/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/egcd2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 02:39:32,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 02:39:32,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 02:39:32,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 02:39:32,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 02:39:32,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 02:39:32,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 02:39:32,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 02:39:32,741 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 02:39:32,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 02:39:32,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 02:39:32,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 02:39:32,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 02:39:32,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 02:39:32,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 02:39:32,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 02:39:32,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 02:39:32,745 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 02:39:32,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 02:39:32,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 02:39:32,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 02:39:32,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 02:39:32,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 02:39:32,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:39:32,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 02:39:32,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 02:39:32,746 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 02:39:32,747 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 02:39:32,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 02:39:32,747 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 02:39:32,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 02:39:32,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 02:39:33,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 02:39:33,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 02:39:33,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 02:39:33,011 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 02:39:33,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-03-18 02:39:33,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1523c7486/785ff766347343ba94929234be2374ad/FLAGb3d1c3e9e [2022-03-18 02:39:33,418 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 02:39:33,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-03-18 02:39:33,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1523c7486/785ff766347343ba94929234be2374ad/FLAGb3d1c3e9e [2022-03-18 02:39:33,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1523c7486/785ff766347343ba94929234be2374ad [2022-03-18 02:39:33,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 02:39:33,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 02:39:33,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 02:39:33,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 02:39:33,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 02:39:33,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:39:33" (1/1) ... [2022-03-18 02:39:33,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87baa67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:39:33, skipping insertion in model container [2022-03-18 02:39:33,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:39:33" (1/1) ... [2022-03-18 02:39:33,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 02:39:33,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 02:39:34,001 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/egcd2-ll_valuebound10.c[490,503] [2022-03-18 02:39:34,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:39:34,026 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 02:39:34,033 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/egcd2-ll_valuebound10.c[490,503] [2022-03-18 02:39:34,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:39:34,050 INFO L208 MainTranslator]: Completed translation [2022-03-18 02:39:34,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:39:34 WrapperNode [2022-03-18 02:39:34,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 02:39:34,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 02:39:34,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 02:39:34,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 02:39:34,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:39:34" (1/1) ... [2022-03-18 02:39:34,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:39:34" (1/1) ... [2022-03-18 02:39:34,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:39:34" (1/1) ... [2022-03-18 02:39:34,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:39:34" (1/1) ... [2022-03-18 02:39:34,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:39:34" (1/1) ... [2022-03-18 02:39:34,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:39:34" (1/1) ... [2022-03-18 02:39:34,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:39:34" (1/1) ... [2022-03-18 02:39:34,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 02:39:34,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 02:39:34,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 02:39:34,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 02:39:34,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:39:34" (1/1) ... [2022-03-18 02:39:34,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:39:34,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:34,107 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) [2022-03-18 02:39:34,108 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 [2022-03-18 02:39:34,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 02:39:34,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 02:39:34,136 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 02:39:34,137 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 02:39:34,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 02:39:34,138 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 02:39:34,138 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 02:39:34,138 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 02:39:34,138 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 02:39:34,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 02:39:34,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 02:39:34,139 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 02:39:34,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 02:39:34,140 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 02:39:34,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 02:39:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 02:39:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 02:39:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 02:39:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 02:39:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 02:39:34,194 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 02:39:34,195 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 02:39:34,372 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 02:39:34,378 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 02:39:34,378 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 02:39:34,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:39:34 BoogieIcfgContainer [2022-03-18 02:39:34,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 02:39:34,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 02:39:34,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 02:39:34,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 02:39:34,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:39:33" (1/3) ... [2022-03-18 02:39:34,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f391797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:39:34, skipping insertion in model container [2022-03-18 02:39:34,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:39:34" (2/3) ... [2022-03-18 02:39:34,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f391797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:39:34, skipping insertion in model container [2022-03-18 02:39:34,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:39:34" (3/3) ... [2022-03-18 02:39:34,406 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2022-03-18 02:39:34,409 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 02:39:34,409 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 02:39:34,474 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 02:39:34,480 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 [2022-03-18 02:39:34,480 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 02:39:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 02:39:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 02:39:34,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:34,503 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 02:39:34,504 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:34,518 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-03-18 02:39:34,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:34,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [331780396] [2022-03-18 02:39:34,536 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:34,537 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 2 times [2022-03-18 02:39:34,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:34,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677682147] [2022-03-18 02:39:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:34,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:39:34,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 02:39:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:39:34,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 02:39:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:39:34,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 02:39:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:39:34,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 02:39:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:39:34,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 02:39:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:39:34,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 02:39:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:39:34,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 02:39:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:39:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 02:39:34,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677682147] [2022-03-18 02:39:34,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677682147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:34,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:34,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:39:34,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [331780396] [2022-03-18 02:39:34,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [331780396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:34,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:34,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:39:34,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443218588] [2022-03-18 02:39:34,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:34,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 02:39:34,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:34,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 02:39:34,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:39:34,811 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:39:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:34,922 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-18 02:39:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 02:39:34,926 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-18 02:39:34,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:34,932 INFO L225 Difference]: With dead ends: 73 [2022-03-18 02:39:34,932 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 02:39:34,938 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:39:34,941 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:34,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:39:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 02:39:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 02:39:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 02:39:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-18 02:39:34,974 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-18 02:39:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:34,974 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-18 02:39:34,974 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:39:34,974 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-18 02:39:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 02:39:34,976 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:34,976 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 02:39:34,977 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 02:39:34,977 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:34,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:34,978 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-03-18 02:39:34,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:34,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [286574487] [2022-03-18 02:39:34,979 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 2 times [2022-03-18 02:39:34,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:34,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313047460] [2022-03-18 02:39:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:34,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:34,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:34,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649093948] [2022-03-18 02:39:34,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:34,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:34,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:35,004 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) [2022-03-18 02:39:35,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 02:39:35,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:35,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:35,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:39:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 02:39:35,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 02:39:35,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:35,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313047460] [2022-03-18 02:39:35,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649093948] [2022-03-18 02:39:35,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649093948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:35,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:35,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-18 02:39:35,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:35,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [286574487] [2022-03-18 02:39:35,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [286574487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:35,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:35,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:39:35,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208604581] [2022-03-18 02:39:35,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:35,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:39:35,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:35,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:39:35,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 02:39:35,484 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:39:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:35,584 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-18 02:39:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:39:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-18 02:39:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:35,585 INFO L225 Difference]: With dead ends: 52 [2022-03-18 02:39:35,586 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 02:39:35,586 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:39:35,587 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:35,588 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 154 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:39:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 02:39:35,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-18 02:39:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 02:39:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-18 02:39:35,600 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-18 02:39:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:35,600 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-18 02:39:35,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:39:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-18 02:39:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 02:39:35,601 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:35,602 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 02:39:35,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:35,827 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 [2022-03-18 02:39:35,827 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:35,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-03-18 02:39:35,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:35,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [794233635] [2022-03-18 02:39:35,829 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 2 times [2022-03-18 02:39:35,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:35,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773315501] [2022-03-18 02:39:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:35,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:35,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:35,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751358945] [2022-03-18 02:39:35,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:35,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:35,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:35,845 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) [2022-03-18 02:39:35,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 02:39:35,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 02:39:35,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:35,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 02:39:35,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 02:39:35,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:39:35,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:35,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773315501] [2022-03-18 02:39:35,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:35,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751358945] [2022-03-18 02:39:35,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751358945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:35,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:35,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:39:35,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:35,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [794233635] [2022-03-18 02:39:35,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [794233635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:35,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:35,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:39:35,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749877619] [2022-03-18 02:39:35,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:35,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:39:35,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:35,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:39:35,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:39:35,982 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 02:39:36,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:36,021 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-18 02:39:36,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:39:36,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-18 02:39:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:36,023 INFO L225 Difference]: With dead ends: 50 [2022-03-18 02:39:36,023 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 02:39:36,024 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:39:36,025 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:36,025 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:39:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 02:39:36,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-18 02:39:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 02:39:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-03-18 02:39:36,036 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2022-03-18 02:39:36,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:36,036 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-03-18 02:39:36,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 02:39:36,036 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-03-18 02:39:36,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 02:39:36,037 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:36,038 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:36,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:36,251 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 [2022-03-18 02:39:36,252 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:36,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:36,252 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-03-18 02:39:36,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:36,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498646865] [2022-03-18 02:39:36,253 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:36,253 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 2 times [2022-03-18 02:39:36,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:36,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274216554] [2022-03-18 02:39:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:36,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:36,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:36,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764435235] [2022-03-18 02:39:36,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:36,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:36,280 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) [2022-03-18 02:39:36,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 02:39:36,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:36,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:36,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:39:36,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 02:39:36,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:39:36,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:36,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274216554] [2022-03-18 02:39:36,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:36,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764435235] [2022-03-18 02:39:36,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764435235] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:36,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:36,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:39:36,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:36,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498646865] [2022-03-18 02:39:36,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498646865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:36,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:36,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:39:36,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966294749] [2022-03-18 02:39:36,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:36,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:39:36,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:36,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:39:36,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:39:36,461 INFO L87 Difference]: Start difference. First operand 43 states and 54 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) [2022-03-18 02:39:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:36,493 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-18 02:39:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:39:36,494 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 50 [2022-03-18 02:39:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:36,496 INFO L225 Difference]: With dead ends: 58 [2022-03-18 02:39:36,496 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 02:39:36,496 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:39:36,497 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:36,498 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 173 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:39:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 02:39:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-18 02:39:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 02:39:36,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-03-18 02:39:36,510 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 50 [2022-03-18 02:39:36,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:36,510 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-03-18 02:39:36,510 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) [2022-03-18 02:39:36,511 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-03-18 02:39:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 02:39:36,512 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:36,512 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:39:36,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:36,727 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 [2022-03-18 02:39:36,728 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:36,728 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-03-18 02:39:36,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:36,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [266070761] [2022-03-18 02:39:36,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:36,729 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 2 times [2022-03-18 02:39:36,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:36,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12608966] [2022-03-18 02:39:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:36,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:36,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:36,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747471446] [2022-03-18 02:39:36,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:36,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:36,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:36,755 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) [2022-03-18 02:39:36,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 02:39:36,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:36,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:36,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:39:36,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:39:36,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:39:36,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:36,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12608966] [2022-03-18 02:39:36,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:36,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747471446] [2022-03-18 02:39:36,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747471446] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:36,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:36,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:39:36,973 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:36,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [266070761] [2022-03-18 02:39:36,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [266070761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:36,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:36,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:39:36,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191425988] [2022-03-18 02:39:36,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:36,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:39:36,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:36,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:39:36,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:39:36,975 INFO L87 Difference]: Start difference. First operand 55 states and 71 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 02:39:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:37,029 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-03-18 02:39:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:39:37,030 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-03-18 02:39:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:37,032 INFO L225 Difference]: With dead ends: 62 [2022-03-18 02:39:37,032 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 02:39:37,032 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:39:37,033 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:37,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:39:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 02:39:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-18 02:39:37,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 02:39:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-03-18 02:39:37,064 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 55 [2022-03-18 02:39:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:37,065 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-03-18 02:39:37,065 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 02:39:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-03-18 02:39:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 02:39:37,070 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:37,070 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:39:37,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 02:39:37,275 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 [2022-03-18 02:39:37,275 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:37,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-03-18 02:39:37,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:37,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [533708257] [2022-03-18 02:39:37,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:37,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 2 times [2022-03-18 02:39:37,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:37,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841760540] [2022-03-18 02:39:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:37,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:37,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:37,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526106898] [2022-03-18 02:39:37,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:37,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:37,293 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) [2022-03-18 02:39:37,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 02:39:37,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:37,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:37,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 02:39:37,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-18 02:39:37,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:37,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:37,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841760540] [2022-03-18 02:39:37,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:37,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526106898] [2022-03-18 02:39:37,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526106898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:39:37,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:39:37,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-18 02:39:37,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:37,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [533708257] [2022-03-18 02:39:37,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [533708257] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:37,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:37,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 02:39:37,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340807861] [2022-03-18 02:39:37,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:37,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 02:39:37,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:37,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 02:39:37,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:39:37,666 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 02:39:37,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:37,776 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-03-18 02:39:37,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 02:39:37,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-18 02:39:37,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:37,778 INFO L225 Difference]: With dead ends: 66 [2022-03-18 02:39:37,778 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 02:39:37,778 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:39:37,781 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:37,781 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 181 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:39:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 02:39:37,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-18 02:39:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 02:39:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-03-18 02:39:37,810 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 60 [2022-03-18 02:39:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:37,811 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-03-18 02:39:37,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 02:39:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-03-18 02:39:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 02:39:37,813 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:37,813 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:37,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:38,020 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 [2022-03-18 02:39:38,020 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:38,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:38,021 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2022-03-18 02:39:38,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:38,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2113326534] [2022-03-18 02:39:38,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:38,022 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 2 times [2022-03-18 02:39:38,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:38,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135415276] [2022-03-18 02:39:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:38,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:38,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:38,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389648657] [2022-03-18 02:39:38,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:38,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:38,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:38,046 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) [2022-03-18 02:39:38,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 02:39:38,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:38,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:38,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 02:39:38,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 02:39:38,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-03-18 02:39:38,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:38,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135415276] [2022-03-18 02:39:38,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:38,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389648657] [2022-03-18 02:39:38,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389648657] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 02:39:38,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:39:38,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-18 02:39:38,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:38,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2113326534] [2022-03-18 02:39:38,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2113326534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:38,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:38,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:39:38,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89016696] [2022-03-18 02:39:38,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:38,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:39:38,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:38,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:39:38,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 02:39:38,352 INFO L87 Difference]: Start difference. First operand 63 states and 77 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-18 02:39:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:38,391 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-18 02:39:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:39:38,392 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-03-18 02:39:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:38,393 INFO L225 Difference]: With dead ends: 69 [2022-03-18 02:39:38,393 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 02:39:38,393 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:39:38,394 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:38,394 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 146 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:39:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 02:39:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-03-18 02:39:38,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 02:39:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-18 02:39:38,409 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 67 [2022-03-18 02:39:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:38,409 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-18 02:39:38,410 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-18 02:39:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-18 02:39:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 02:39:38,411 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:38,411 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:38,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:38,627 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 [2022-03-18 02:39:38,628 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:38,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:38,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-03-18 02:39:38,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:38,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [951879768] [2022-03-18 02:39:38,629 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:38,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 2 times [2022-03-18 02:39:38,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:38,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408839] [2022-03-18 02:39:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:38,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:38,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:38,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50591521] [2022-03-18 02:39:38,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:38,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:38,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:38,653 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) [2022-03-18 02:39:38,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 02:39:38,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:38,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:38,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:39:38,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 02:39:38,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 02:39:38,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:38,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408839] [2022-03-18 02:39:38,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:38,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50591521] [2022-03-18 02:39:38,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50591521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:38,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:38,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:39:38,966 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:38,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [951879768] [2022-03-18 02:39:38,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [951879768] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:38,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:38,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:39:38,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470886019] [2022-03-18 02:39:38,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:38,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:39:38,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:38,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:39:38,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:39:38,968 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:39:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:39,120 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-18 02:39:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:39:39,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-18 02:39:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:39,126 INFO L225 Difference]: With dead ends: 106 [2022-03-18 02:39:39,126 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 02:39:39,126 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:39:39,127 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:39,127 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:39:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 02:39:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-18 02:39:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 02:39:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-18 02:39:39,158 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-18 02:39:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:39,158 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-18 02:39:39,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:39:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-18 02:39:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 02:39:39,159 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:39,159 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:39,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:39,379 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 [2022-03-18 02:39:39,379 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:39,380 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-03-18 02:39:39,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:39,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1144116579] [2022-03-18 02:39:39,381 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2022-03-18 02:39:39,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:39,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58845625] [2022-03-18 02:39:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:39,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:39,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:39,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781877160] [2022-03-18 02:39:39,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:39,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:39,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:39,393 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) [2022-03-18 02:39:39,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 02:39:39,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:39,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:39,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 02:39:39,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 02:39:39,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 02:39:39,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:39,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58845625] [2022-03-18 02:39:39,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:39,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781877160] [2022-03-18 02:39:39,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781877160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:39,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:39,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-18 02:39:39,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:39,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1144116579] [2022-03-18 02:39:39,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1144116579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:39,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:39,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:39:39,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656931456] [2022-03-18 02:39:39,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:39,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:39:39,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:39,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:39:39,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:39:39,795 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 02:39:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:39,967 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-03-18 02:39:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:39:39,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-03-18 02:39:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:39,968 INFO L225 Difference]: With dead ends: 124 [2022-03-18 02:39:39,968 INFO L226 Difference]: Without dead ends: 121 [2022-03-18 02:39:39,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:39:39,969 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:39,970 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 290 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:39:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-18 02:39:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-03-18 02:39:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 02:39:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-03-18 02:39:39,991 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 75 [2022-03-18 02:39:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:39,992 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-03-18 02:39:39,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 02:39:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-03-18 02:39:39,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 02:39:39,993 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:39,993 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:40,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:40,210 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 [2022-03-18 02:39:40,211 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2022-03-18 02:39:40,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:40,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1482703031] [2022-03-18 02:39:40,212 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:40,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 4 times [2022-03-18 02:39:40,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:40,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811765420] [2022-03-18 02:39:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:40,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:40,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:40,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286029888] [2022-03-18 02:39:40,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:39:40,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:40,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:40,224 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) [2022-03-18 02:39:40,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 02:39:40,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:39:40,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:40,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 02:39:40,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 34 proven. 32 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 02:39:40,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-18 02:39:41,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:41,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811765420] [2022-03-18 02:39:41,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:41,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286029888] [2022-03-18 02:39:41,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286029888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:41,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:41,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2022-03-18 02:39:41,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:41,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1482703031] [2022-03-18 02:39:41,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1482703031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:41,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:41,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:39:41,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433962026] [2022-03-18 02:39:41,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:41,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:39:41,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:41,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:39:41,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-18 02:39:41,662 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-03-18 02:39:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:42,254 INFO L93 Difference]: Finished difference Result 134 states and 179 transitions. [2022-03-18 02:39:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:39:42,255 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 80 [2022-03-18 02:39:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:42,256 INFO L225 Difference]: With dead ends: 134 [2022-03-18 02:39:42,256 INFO L226 Difference]: Without dead ends: 132 [2022-03-18 02:39:42,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-03-18 02:39:42,257 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:42,258 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 287 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:39:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-18 02:39:42,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-18 02:39:42,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 02:39:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-03-18 02:39:42,294 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 80 [2022-03-18 02:39:42,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:42,294 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-03-18 02:39:42,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-03-18 02:39:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-03-18 02:39:42,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 02:39:42,295 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:42,296 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:42,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:42,519 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 [2022-03-18 02:39:42,519 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 5 times [2022-03-18 02:39:42,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:42,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [766300327] [2022-03-18 02:39:42,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 6 times [2022-03-18 02:39:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:42,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308184062] [2022-03-18 02:39:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:42,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:42,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:42,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48207212] [2022-03-18 02:39:42,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:39:42,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:42,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:42,535 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) [2022-03-18 02:39:42,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 02:39:42,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:39:42,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:42,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 02:39:42,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-18 02:39:43,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:43,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:43,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308184062] [2022-03-18 02:39:43,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:43,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48207212] [2022-03-18 02:39:43,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48207212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:39:43,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:39:43,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 02:39:43,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:43,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [766300327] [2022-03-18 02:39:43,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [766300327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:43,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:43,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:39:43,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374105357] [2022-03-18 02:39:43,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:43,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:39:43,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:39:43,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:39:43,245 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 02:39:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:43,564 INFO L93 Difference]: Finished difference Result 138 states and 182 transitions. [2022-03-18 02:39:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:39:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2022-03-18 02:39:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:43,566 INFO L225 Difference]: With dead ends: 138 [2022-03-18 02:39:43,566 INFO L226 Difference]: Without dead ends: 136 [2022-03-18 02:39:43,567 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:39:43,567 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 26 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:43,567 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 238 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:39:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-18 02:39:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2022-03-18 02:39:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 76 states have internal predecessors, (87), 47 states have call successors, (47), 13 states have call predecessors, (47), 12 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 02:39:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 178 transitions. [2022-03-18 02:39:43,589 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 178 transitions. Word has length 85 [2022-03-18 02:39:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:43,590 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 178 transitions. [2022-03-18 02:39:43,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 02:39:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 178 transitions. [2022-03-18 02:39:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 02:39:43,591 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:43,591 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:43,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:43,808 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 [2022-03-18 02:39:43,809 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:43,809 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-03-18 02:39:43,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:43,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1359441344] [2022-03-18 02:39:43,810 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:43,810 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 2 times [2022-03-18 02:39:43,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:43,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92156774] [2022-03-18 02:39:43,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:43,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:43,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:43,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998380891] [2022-03-18 02:39:43,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:43,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:43,825 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) [2022-03-18 02:39:43,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 02:39:43,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:43,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:43,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 02:39:43,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 02:39:44,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 02:39:44,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92156774] [2022-03-18 02:39:44,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998380891] [2022-03-18 02:39:44,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998380891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:44,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:44,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 02:39:44,719 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1359441344] [2022-03-18 02:39:44,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1359441344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:44,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:44,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:39:44,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980683914] [2022-03-18 02:39:44,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:44,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:39:44,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:39:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:39:44,721 INFO L87 Difference]: Start difference. First operand 134 states and 178 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 02:39:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:44,959 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2022-03-18 02:39:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:39:44,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-03-18 02:39:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:44,962 INFO L225 Difference]: With dead ends: 161 [2022-03-18 02:39:44,962 INFO L226 Difference]: Without dead ends: 158 [2022-03-18 02:39:44,962 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:39:44,963 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:44,963 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 378 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:39:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-18 02:39:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-03-18 02:39:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 89 states have internal predecessors, (102), 55 states have call successors, (55), 15 states have call predecessors, (55), 14 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-18 02:39:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2022-03-18 02:39:44,989 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 91 [2022-03-18 02:39:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:44,989 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2022-03-18 02:39:44,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 02:39:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2022-03-18 02:39:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-18 02:39:44,990 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:44,990 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:45,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:45,207 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 [2022-03-18 02:39:45,207 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 7 times [2022-03-18 02:39:45,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:45,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1031531309] [2022-03-18 02:39:45,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:45,209 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 8 times [2022-03-18 02:39:45,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:45,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076268139] [2022-03-18 02:39:45,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:45,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:45,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:45,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296811882] [2022-03-18 02:39:45,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:45,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:45,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:45,222 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) [2022-03-18 02:39:45,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 02:39:45,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:45,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:45,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 02:39:45,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-03-18 02:39:45,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:39:45,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:45,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076268139] [2022-03-18 02:39:45,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296811882] [2022-03-18 02:39:45,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296811882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:45,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:45,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:39:45,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1031531309] [2022-03-18 02:39:45,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1031531309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:45,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:45,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:39:45,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009660117] [2022-03-18 02:39:45,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:45,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:39:45,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:45,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:39:45,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:39:45,444 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-18 02:39:45,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:45,520 INFO L93 Difference]: Finished difference Result 205 states and 283 transitions. [2022-03-18 02:39:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:39:45,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2022-03-18 02:39:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:45,522 INFO L225 Difference]: With dead ends: 205 [2022-03-18 02:39:45,523 INFO L226 Difference]: Without dead ends: 160 [2022-03-18 02:39:45,523 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 02:39:45,524 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:45,524 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 188 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:39:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-18 02:39:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 151. [2022-03-18 02:39:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 81 states have (on average 1.123456790123457) internal successors, (91), 83 states have internal predecessors, (91), 55 states have call successors, (55), 15 states have call predecessors, (55), 14 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-18 02:39:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-03-18 02:39:45,555 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 100 [2022-03-18 02:39:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:45,555 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-03-18 02:39:45,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-18 02:39:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-03-18 02:39:45,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 02:39:45,556 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:45,557 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:45,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:45,779 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 [2022-03-18 02:39:45,780 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-03-18 02:39:45,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:45,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1506266773] [2022-03-18 02:39:45,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:45,781 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2022-03-18 02:39:45,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:45,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878392224] [2022-03-18 02:39:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:45,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:45,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:45,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608722834] [2022-03-18 02:39:45,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:45,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:45,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:45,800 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) [2022-03-18 02:39:45,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 02:39:45,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:45,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:45,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-18 02:39:45,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 87 proven. 52 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-18 02:39:46,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:51,868 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse3 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))))) (let ((.cse0 (* .cse3 c_main_~y~0)) (.cse2 (* .cse1 c_main_~x~0))) (let ((.cse4 (+ .cse0 .cse2)) (.cse5 (* c_main_~q~0 c_main_~x~0)) (.cse6 (* c_main_~s~0 c_main_~y~0))) (or (= (+ .cse0 (* c_main_~xy~0 .cse1) .cse2 (* c_main_~yy~0 .cse3)) (+ .cse0 (* .cse4 c_main_~y~0) .cse2)) (not (= c_main_~c~0 .cse4)) (not (= (+ (* c_main_~b~0 c_main_~k~0) c_main_~c~0) c_main_~a~0)) (not (= (+ .cse5 .cse6 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse5 .cse6))))))) is different from true [2022-03-18 02:40:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 39 refuted. 0 times theorem prover too weak. 196 trivial. 4 not checked. [2022-03-18 02:40:05,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:05,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878392224] [2022-03-18 02:40:05,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:05,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608722834] [2022-03-18 02:40:05,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608722834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:05,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:05,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-18 02:40:05,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:05,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1506266773] [2022-03-18 02:40:05,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1506266773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:05,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:05,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:40:05,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768716675] [2022-03-18 02:40:05,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:05,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:40:05,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:40:05,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=440, Unknown=1, NotChecked=44, Total=600 [2022-03-18 02:40:05,292 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:40:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:06,307 INFO L93 Difference]: Finished difference Result 158 states and 204 transitions. [2022-03-18 02:40:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:40:06,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2022-03-18 02:40:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:06,309 INFO L225 Difference]: With dead ends: 158 [2022-03-18 02:40:06,309 INFO L226 Difference]: Without dead ends: 156 [2022-03-18 02:40:06,309 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=147, Invalid=612, Unknown=1, NotChecked=52, Total=812 [2022-03-18 02:40:06,310 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:06,310 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 341 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 02:40:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-18 02:40:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-03-18 02:40:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 84 states have (on average 1.119047619047619) internal successors, (94), 86 states have internal predecessors, (94), 55 states have call successors, (55), 16 states have call predecessors, (55), 15 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-18 02:40:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 201 transitions. [2022-03-18 02:40:06,342 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 201 transitions. Word has length 107 [2022-03-18 02:40:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:06,344 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 201 transitions. [2022-03-18 02:40:06,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:40:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 201 transitions. [2022-03-18 02:40:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 02:40:06,345 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:06,345 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:06,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:06,559 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 [2022-03-18 02:40:06,559 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 3 times [2022-03-18 02:40:06,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:06,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [112143090] [2022-03-18 02:40:06,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:06,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 4 times [2022-03-18 02:40:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:06,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894527449] [2022-03-18 02:40:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:06,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:06,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:06,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265620582] [2022-03-18 02:40:06,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:40:06,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:06,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:06,571 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) [2022-03-18 02:40:06,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 02:40:06,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:40:06,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:06,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 02:40:06,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:07,138 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:40:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 58 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-18 02:40:08,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:09,434 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:40:09,450 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:40:11,885 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:40:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 55 proven. 49 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-18 02:40:39,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:39,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894527449] [2022-03-18 02:40:39,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:39,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265620582] [2022-03-18 02:40:39,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265620582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:39,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:39,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-03-18 02:40:39,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:39,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [112143090] [2022-03-18 02:40:39,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [112143090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:39,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:39,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:40:39,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018326072] [2022-03-18 02:40:39,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:39,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:40:39,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:39,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:40:39,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=625, Unknown=5, NotChecked=0, Total=756 [2022-03-18 02:40:40,000 INFO L87 Difference]: Start difference. First operand 155 states and 201 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 02:40:41,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:41,993 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2022-03-18 02:40:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:40:41,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2022-03-18 02:40:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:41,996 INFO L225 Difference]: With dead ends: 188 [2022-03-18 02:40:41,996 INFO L226 Difference]: Without dead ends: 185 [2022-03-18 02:40:41,996 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=186, Invalid=931, Unknown=5, NotChecked=0, Total=1122 [2022-03-18 02:40:41,997 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 42 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:41,997 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 483 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 02:40:41,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-18 02:40:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-03-18 02:40:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 99 states have (on average 1.121212121212121) internal successors, (111), 101 states have internal predecessors, (111), 67 states have call successors, (67), 18 states have call predecessors, (67), 17 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-18 02:40:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 242 transitions. [2022-03-18 02:40:42,031 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 242 transitions. Word has length 113 [2022-03-18 02:40:42,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:42,032 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 242 transitions. [2022-03-18 02:40:42,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 02:40:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 242 transitions. [2022-03-18 02:40:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 02:40:42,034 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:42,034 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:42,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:42,253 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 [2022-03-18 02:40:42,254 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:42,254 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 5 times [2022-03-18 02:40:42,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:42,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [922984405] [2022-03-18 02:40:42,255 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:42,255 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 6 times [2022-03-18 02:40:42,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:42,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383919116] [2022-03-18 02:40:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:42,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:42,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:42,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468793152] [2022-03-18 02:40:42,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:40:42,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:42,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:42,264 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) [2022-03-18 02:40:42,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 02:40:42,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:40:42,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:42,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:40:42,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-18 02:40:42,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-18 02:40:42,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:42,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383919116] [2022-03-18 02:40:42,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:42,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468793152] [2022-03-18 02:40:42,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468793152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:42,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:42,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-18 02:40:42,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:42,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [922984405] [2022-03-18 02:40:42,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [922984405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:42,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:42,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 02:40:42,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697929865] [2022-03-18 02:40:42,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:42,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 02:40:42,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 02:40:42,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 02:40:42,631 INFO L87 Difference]: Start difference. First operand 184 states and 242 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-18 02:40:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:42,818 INFO L93 Difference]: Finished difference Result 244 states and 342 transitions. [2022-03-18 02:40:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:40:42,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2022-03-18 02:40:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:42,819 INFO L225 Difference]: With dead ends: 244 [2022-03-18 02:40:42,819 INFO L226 Difference]: Without dead ends: 236 [2022-03-18 02:40:42,820 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:40:42,820 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 14 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:42,820 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 359 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:40:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-18 02:40:42,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 217. [2022-03-18 02:40:42,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 87 states have call successors, (87), 18 states have call predecessors, (87), 17 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-03-18 02:40:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 300 transitions. [2022-03-18 02:40:42,869 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 300 transitions. Word has length 116 [2022-03-18 02:40:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:42,869 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 300 transitions. [2022-03-18 02:40:42,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-18 02:40:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 300 transitions. [2022-03-18 02:40:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-18 02:40:42,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:42,870 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1] [2022-03-18 02:40:42,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:43,093 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 [2022-03-18 02:40:43,093 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:43,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:43,094 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 3 times [2022-03-18 02:40:43,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:43,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [758683228] [2022-03-18 02:40:43,094 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:43,095 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 4 times [2022-03-18 02:40:43,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:43,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358727349] [2022-03-18 02:40:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:43,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:43,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:43,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825922781] [2022-03-18 02:40:43,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:40:43,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:43,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:43,103 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) [2022-03-18 02:40:43,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 02:40:43,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:40:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:43,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 02:40:43,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-18 02:40:43,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-18 02:40:43,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:43,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358727349] [2022-03-18 02:40:43,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:43,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825922781] [2022-03-18 02:40:43,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825922781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:43,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:43,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:40:43,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:43,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [758683228] [2022-03-18 02:40:43,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [758683228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:43,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:43,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:40:43,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270829094] [2022-03-18 02:40:43,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:43,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:40:43,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:43,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:40:43,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:40:43,528 INFO L87 Difference]: Start difference. First operand 217 states and 300 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-18 02:40:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:43,729 INFO L93 Difference]: Finished difference Result 235 states and 314 transitions. [2022-03-18 02:40:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:40:43,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 122 [2022-03-18 02:40:43,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:43,731 INFO L225 Difference]: With dead ends: 235 [2022-03-18 02:40:43,731 INFO L226 Difference]: Without dead ends: 232 [2022-03-18 02:40:43,731 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:40:43,731 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:43,731 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 209 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:40:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-18 02:40:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-03-18 02:40:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 125 states have internal predecessors, (141), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-18 02:40:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 309 transitions. [2022-03-18 02:40:43,773 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 309 transitions. Word has length 122 [2022-03-18 02:40:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:43,774 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 309 transitions. [2022-03-18 02:40:43,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-18 02:40:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 309 transitions. [2022-03-18 02:40:43,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 02:40:43,775 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:43,775 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-03-18 02:40:43,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:43,983 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 [2022-03-18 02:40:43,983 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:43,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 5 times [2022-03-18 02:40:43,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:43,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86406293] [2022-03-18 02:40:43,984 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 6 times [2022-03-18 02:40:43,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:43,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618606296] [2022-03-18 02:40:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:43,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:43,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:43,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052958131] [2022-03-18 02:40:43,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:40:43,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:43,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:43,994 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) [2022-03-18 02:40:44,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 02:40:44,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:40:44,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:44,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 02:40:44,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-18 02:40:44,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-18 02:40:45,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:45,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618606296] [2022-03-18 02:40:45,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:45,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052958131] [2022-03-18 02:40:45,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052958131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:45,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:45,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-03-18 02:40:45,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:45,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86406293] [2022-03-18 02:40:45,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86406293] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:45,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:45,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:40:45,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914629297] [2022-03-18 02:40:45,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:45,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:40:45,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:45,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:40:45,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:40:45,806 INFO L87 Difference]: Start difference. First operand 231 states and 309 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-18 02:40:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:46,272 INFO L93 Difference]: Finished difference Result 269 states and 358 transitions. [2022-03-18 02:40:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:40:46,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2022-03-18 02:40:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:46,274 INFO L225 Difference]: With dead ends: 269 [2022-03-18 02:40:46,274 INFO L226 Difference]: Without dead ends: 267 [2022-03-18 02:40:46,275 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:40:46,275 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 22 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:46,275 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 562 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:40:46,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-18 02:40:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2022-03-18 02:40:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-18 02:40:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 353 transitions. [2022-03-18 02:40:46,325 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 353 transitions. Word has length 127 [2022-03-18 02:40:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:46,325 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 353 transitions. [2022-03-18 02:40:46,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-18 02:40:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 353 transitions. [2022-03-18 02:40:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-18 02:40:46,326 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:46,326 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:46,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:46,544 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 [2022-03-18 02:40:46,544 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:46,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 7 times [2022-03-18 02:40:46,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:46,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [975505856] [2022-03-18 02:40:46,545 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:46,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 8 times [2022-03-18 02:40:46,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:46,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83021384] [2022-03-18 02:40:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:46,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:46,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:46,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775534582] [2022-03-18 02:40:46,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:40:46,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:46,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:46,553 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) [2022-03-18 02:40:46,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 02:40:46,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:40:46,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:46,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 02:40:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-03-18 02:40:47,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:49,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:49,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83021384] [2022-03-18 02:40:49,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:49,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775534582] [2022-03-18 02:40:49,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775534582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:40:49,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:40:49,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 02:40:49,724 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:49,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [975505856] [2022-03-18 02:40:49,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [975505856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:49,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:49,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:40:49,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896625247] [2022-03-18 02:40:49,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:49,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:40:49,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:49,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:40:49,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2022-03-18 02:40:49,725 INFO L87 Difference]: Start difference. First operand 264 states and 353 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-18 02:40:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:49,989 INFO L93 Difference]: Finished difference Result 281 states and 367 transitions. [2022-03-18 02:40:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:40:49,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 129 [2022-03-18 02:40:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:49,991 INFO L225 Difference]: With dead ends: 281 [2022-03-18 02:40:49,991 INFO L226 Difference]: Without dead ends: 279 [2022-03-18 02:40:49,991 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=62, Invalid=209, Unknown=1, NotChecked=0, Total=272 [2022-03-18 02:40:49,992 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:49,992 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 264 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:40:49,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-18 02:40:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 258. [2022-03-18 02:40:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 143 states have (on average 1.118881118881119) internal successors, (160), 145 states have internal predecessors, (160), 88 states have call successors, (88), 27 states have call predecessors, (88), 26 states have return successors, (86), 85 states have call predecessors, (86), 86 states have call successors, (86) [2022-03-18 02:40:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 334 transitions. [2022-03-18 02:40:50,033 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 334 transitions. Word has length 129 [2022-03-18 02:40:50,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:50,033 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 334 transitions. [2022-03-18 02:40:50,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-18 02:40:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 334 transitions. [2022-03-18 02:40:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-18 02:40:50,034 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:50,034 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-03-18 02:40:50,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:50,244 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 [2022-03-18 02:40:50,244 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 9 times [2022-03-18 02:40:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:50,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1627679633] [2022-03-18 02:40:50,245 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:50,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 10 times [2022-03-18 02:40:50,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:50,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371990036] [2022-03-18 02:40:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:50,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:50,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:50,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057910696] [2022-03-18 02:40:50,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:40:50,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:50,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:50,254 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) [2022-03-18 02:40:50,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 02:40:50,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:40:50,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:50,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-18 02:40:50,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:41:01,283 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:41:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 133 proven. 85 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-03-18 02:41:01,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:41:01,386 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:41:01,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:41:01,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371990036] [2022-03-18 02:41:01,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:41:01,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057910696] [2022-03-18 02:41:01,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057910696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:41:01,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:41:01,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-18 02:41:01,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:41:01,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1627679633] [2022-03-18 02:41:01,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1627679633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:41:01,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:41:01,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 02:41:01,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637963055] [2022-03-18 02:41:01,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:41:01,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 02:41:01,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:01,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 02:41:01,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:41:01,575 INFO L87 Difference]: Start difference. First operand 258 states and 334 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-18 02:41:03,814 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 [] [2022-03-18 02:41:17,938 WARN L232 SmtUtils]: Spent 14.06s on a formula simplification. DAG size of input: 36 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:41:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:41:18,111 INFO L93 Difference]: Finished difference Result 296 states and 384 transitions. [2022-03-18 02:41:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:41:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 132 [2022-03-18 02:41:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:41:18,114 INFO L225 Difference]: With dead ends: 296 [2022-03-18 02:41:18,114 INFO L226 Difference]: Without dead ends: 294 [2022-03-18 02:41:18,114 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:41:18,115 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 42 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:41:18,115 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 233 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 269 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 02:41:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-03-18 02:41:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2022-03-18 02:41:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 161 states have (on average 1.124223602484472) internal successors, (181), 163 states have internal predecessors, (181), 100 states have call successors, (100), 30 states have call predecessors, (100), 29 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2022-03-18 02:41:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 379 transitions. [2022-03-18 02:41:18,168 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 379 transitions. Word has length 132 [2022-03-18 02:41:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:41:18,168 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 379 transitions. [2022-03-18 02:41:18,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-18 02:41:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 379 transitions. [2022-03-18 02:41:18,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 02:41:18,169 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:41:18,169 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:41:18,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 02:41:18,370 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 [2022-03-18 02:41:18,370 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:41:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:41:18,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 7 times [2022-03-18 02:41:18,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:18,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [871571664] [2022-03-18 02:41:18,371 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:41:18,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 8 times [2022-03-18 02:41:18,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:41:18,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513004543] [2022-03-18 02:41:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:41:18,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:41:18,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:41:18,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726423111] [2022-03-18 02:41:18,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:41:18,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:41:18,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:41:18,385 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) [2022-03-18 02:41:18,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 02:41:18,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:41:18,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:41:18,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 02:41:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:41:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-18 02:41:19,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:41:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-18 02:41:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:41:21,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513004543] [2022-03-18 02:41:21,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:41:21,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726423111] [2022-03-18 02:41:21,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726423111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:41:21,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:41:21,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-03-18 02:41:21,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:41:21,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [871571664] [2022-03-18 02:41:21,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [871571664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:41:21,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:41:21,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:41:21,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334513882] [2022-03-18 02:41:21,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:41:21,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:41:21,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:21,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:41:21,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:41:21,747 INFO L87 Difference]: Start difference. First operand 291 states and 379 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-18 02:41:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:41:22,830 INFO L93 Difference]: Finished difference Result 339 states and 443 transitions. [2022-03-18 02:41:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:41:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 135 [2022-03-18 02:41:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:41:22,833 INFO L225 Difference]: With dead ends: 339 [2022-03-18 02:41:22,833 INFO L226 Difference]: Without dead ends: 332 [2022-03-18 02:41:22,834 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:41:22,834 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:41:22,834 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 503 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 02:41:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-18 02:41:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 301. [2022-03-18 02:41:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 166 states have (on average 1.1265060240963856) internal successors, (187), 168 states have internal predecessors, (187), 104 states have call successors, (104), 31 states have call predecessors, (104), 30 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2022-03-18 02:41:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 393 transitions. [2022-03-18 02:41:22,896 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 393 transitions. Word has length 135 [2022-03-18 02:41:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:41:22,896 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 393 transitions. [2022-03-18 02:41:22,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-18 02:41:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 393 transitions. [2022-03-18 02:41:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 02:41:22,897 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:41:22,897 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:41:22,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 02:41:23,111 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 [2022-03-18 02:41:23,111 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:41:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:41:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 9 times [2022-03-18 02:41:23,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:23,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [82834517] [2022-03-18 02:41:23,112 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:41:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 10 times [2022-03-18 02:41:23,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:41:23,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126120222] [2022-03-18 02:41:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:41:23,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:41:23,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:41:23,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289703812] [2022-03-18 02:41:23,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:41:23,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:41:23,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:41:23,123 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) [2022-03-18 02:41:23,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 02:41:23,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:41:23,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:41:23,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 02:41:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:41:24,875 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:41:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 149 proven. 58 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-03-18 02:41:27,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:41:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 169 proven. 21 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-03-18 02:41:30,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:41:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126120222] [2022-03-18 02:41:30,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:41:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289703812] [2022-03-18 02:41:30,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289703812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:41:30,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:41:30,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 32 [2022-03-18 02:41:30,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:41:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [82834517] [2022-03-18 02:41:30,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [82834517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:41:30,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:41:30,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 02:41:30,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322713994] [2022-03-18 02:41:30,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:41:30,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 02:41:30,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:30,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 02:41:30,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-03-18 02:41:30,922 INFO L87 Difference]: Start difference. First operand 301 states and 393 transitions. Second operand has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-18 02:41:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:41:33,214 INFO L93 Difference]: Finished difference Result 351 states and 459 transitions. [2022-03-18 02:41:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 02:41:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2022-03-18 02:41:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:41:33,217 INFO L225 Difference]: With dead ends: 351 [2022-03-18 02:41:33,217 INFO L226 Difference]: Without dead ends: 348 [2022-03-18 02:41:33,218 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 02:41:33,218 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 57 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:41:33,219 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 510 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 02:41:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-03-18 02:41:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 315. [2022-03-18 02:41:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 174 states have (on average 1.1264367816091954) internal successors, (196), 176 states have internal predecessors, (196), 108 states have call successors, (108), 33 states have call predecessors, (108), 32 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2022-03-18 02:41:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 410 transitions. [2022-03-18 02:41:33,291 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 410 transitions. Word has length 138 [2022-03-18 02:41:33,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:41:33,292 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 410 transitions. [2022-03-18 02:41:33,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-18 02:41:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 410 transitions. [2022-03-18 02:41:33,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 02:41:33,293 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:41:33,293 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:41:33,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 02:41:33,507 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 [2022-03-18 02:41:33,507 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:41:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:41:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 11 times [2022-03-18 02:41:33,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:33,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1143341495] [2022-03-18 02:41:33,508 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:41:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 12 times [2022-03-18 02:41:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:41:33,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471507463] [2022-03-18 02:41:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:41:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:41:33,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:41:33,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803380093] [2022-03-18 02:41:33,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:41:33,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:41:33,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:41:33,522 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) [2022-03-18 02:41:33,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 02:41:33,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:41:33,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:41:33,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 02:41:33,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:41:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 76 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-03-18 02:41:34,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:41:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 149 proven. 31 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2022-03-18 02:41:34,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:41:34,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471507463] [2022-03-18 02:41:34,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:41:34,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803380093] [2022-03-18 02:41:34,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803380093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:41:34,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:41:34,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2022-03-18 02:41:34,566 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:41:34,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1143341495] [2022-03-18 02:41:34,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1143341495] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:41:34,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:41:34,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:41:34,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528522806] [2022-03-18 02:41:34,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:41:34,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:41:34,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:34,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:41:34,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:41:34,567 INFO L87 Difference]: Start difference. First operand 315 states and 410 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-18 02:41:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:41:35,262 INFO L93 Difference]: Finished difference Result 383 states and 501 transitions. [2022-03-18 02:41:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:41:35,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 149 [2022-03-18 02:41:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:41:35,265 INFO L225 Difference]: With dead ends: 383 [2022-03-18 02:41:35,266 INFO L226 Difference]: Without dead ends: 381 [2022-03-18 02:41:35,266 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 280 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-18 02:41:35,266 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 38 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:41:35,267 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 438 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:41:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-18 02:41:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-03-18 02:41:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 207 states have (on average 1.1256038647342994) internal successors, (233), 209 states have internal predecessors, (233), 132 states have call successors, (132), 38 states have call predecessors, (132), 37 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2022-03-18 02:41:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 495 transitions. [2022-03-18 02:41:35,349 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 495 transitions. Word has length 149 [2022-03-18 02:41:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:41:35,350 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 495 transitions. [2022-03-18 02:41:35,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-18 02:41:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 495 transitions. [2022-03-18 02:41:35,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-18 02:41:35,351 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:41:35,351 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:41:35,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 02:41:35,575 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 [2022-03-18 02:41:35,575 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:41:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:41:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 13 times [2022-03-18 02:41:35,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:35,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [139969632] [2022-03-18 02:41:35,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:41:35,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 14 times [2022-03-18 02:41:35,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:41:35,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489231463] [2022-03-18 02:41:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:41:35,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:41:35,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:41:35,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017888346] [2022-03-18 02:41:35,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:41:35,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:41:35,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:41:35,584 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) [2022-03-18 02:41:35,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 02:41:35,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:41:35,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:41:35,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-18 02:41:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:41:37,195 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:41:37,197 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:41:37,198 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:41:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 192 proven. 173 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 02:41:41,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:41:48,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:41:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489231463] [2022-03-18 02:41:48,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:41:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017888346] [2022-03-18 02:41:48,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017888346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:41:48,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:41:48,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-18 02:41:48,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:41:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [139969632] [2022-03-18 02:41:48,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [139969632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:41:48,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:41:48,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 02:41:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338445934] [2022-03-18 02:41:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:41:48,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 02:41:48,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:48,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 02:41:48,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=395, Unknown=3, NotChecked=0, Total=506 [2022-03-18 02:41:48,330 INFO L87 Difference]: Start difference. First operand 377 states and 495 transitions. Second operand has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-03-18 02:41:52,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:41:54,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:41:56,267 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:41:58,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:42:00,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:42:02,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:42:24,677 WARN L232 SmtUtils]: Spent 22.23s on a formula simplification. DAG size of input: 65 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:42:49,104 WARN L232 SmtUtils]: Spent 24.30s on a formula simplification. DAG size of input: 69 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:42:51,633 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 [] [2022-03-18 02:42:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:52,275 INFO L93 Difference]: Finished difference Result 415 states and 544 transitions. [2022-03-18 02:42:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:42:52,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 154 [2022-03-18 02:42:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:52,277 INFO L225 Difference]: With dead ends: 415 [2022-03-18 02:42:52,277 INFO L226 Difference]: Without dead ends: 413 [2022-03-18 02:42:52,278 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=158, Invalid=651, Unknown=3, NotChecked=0, Total=812 [2022-03-18 02:42:52,279 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 31 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 50 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:52,280 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 786 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 879 Invalid, 7 Unknown, 0 Unchecked, 17.0s Time] [2022-03-18 02:42:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-03-18 02:42:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 410. [2022-03-18 02:42:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 225 states have (on average 1.1244444444444444) internal successors, (253), 227 states have internal predecessors, (253), 144 states have call successors, (144), 41 states have call predecessors, (144), 40 states have return successors, (142), 141 states have call predecessors, (142), 142 states have call successors, (142) [2022-03-18 02:42:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 539 transitions. [2022-03-18 02:42:52,395 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 539 transitions. Word has length 154 [2022-03-18 02:42:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:52,396 INFO L478 AbstractCegarLoop]: Abstraction has 410 states and 539 transitions. [2022-03-18 02:42:52,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-03-18 02:42:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 539 transitions. [2022-03-18 02:42:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-18 02:42:52,397 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:52,397 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1] [2022-03-18 02:42:52,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:52,598 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 [2022-03-18 02:42:52,598 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:52,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 11 times [2022-03-18 02:42:52,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:52,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [127154471] [2022-03-18 02:42:52,599 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:52,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 12 times [2022-03-18 02:42:52,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:52,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090545357] [2022-03-18 02:42:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:52,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:52,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:52,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83708969] [2022-03-18 02:42:52,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:42:52,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:52,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:52,609 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) [2022-03-18 02:42:52,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 02:42:52,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:42:52,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:52,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 02:42:52,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 89 proven. 97 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-03-18 02:42:53,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:53,892 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:43:25,068 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 107 proven. 85 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-03-18 02:45:27,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:27,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090545357] [2022-03-18 02:45:27,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:27,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83708969] [2022-03-18 02:45:27,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83708969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:45:27,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:45:27,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2022-03-18 02:45:27,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:27,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [127154471] [2022-03-18 02:45:27,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [127154471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:27,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:27,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:45:27,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948855747] [2022-03-18 02:45:27,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:27,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:45:27,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:27,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:45:27,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-18 02:45:27,629 INFO L87 Difference]: Start difference. First operand 410 states and 539 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 02:45:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:28,217 INFO L93 Difference]: Finished difference Result 422 states and 549 transitions. [2022-03-18 02:45:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:45:28,218 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 157 [2022-03-18 02:45:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:28,223 INFO L225 Difference]: With dead ends: 422 [2022-03-18 02:45:28,223 INFO L226 Difference]: Without dead ends: 415 [2022-03-18 02:45:28,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:45:28,224 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 23 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:28,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 371 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:45:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-18 02:45:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 383. [2022-03-18 02:45:28,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 211 states have (on average 1.1184834123222749) internal successors, (236), 212 states have internal predecessors, (236), 133 states have call successors, (133), 39 states have call predecessors, (133), 38 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-18 02:45:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 500 transitions. [2022-03-18 02:45:28,323 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 500 transitions. Word has length 157 [2022-03-18 02:45:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:28,323 INFO L478 AbstractCegarLoop]: Abstraction has 383 states and 500 transitions. [2022-03-18 02:45:28,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 02:45:28,324 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 500 transitions. [2022-03-18 02:45:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-18 02:45:28,325 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:28,325 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:45:28,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 02:45:28,547 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 [2022-03-18 02:45:28,547 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 13 times [2022-03-18 02:45:28,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:28,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [977848316] [2022-03-18 02:45:28,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 14 times [2022-03-18 02:45:28,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:28,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371690247] [2022-03-18 02:45:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:28,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:28,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:28,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374002221] [2022-03-18 02:45:28,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:45:28,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:28,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:28,560 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) [2022-03-18 02:45:28,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 02:45:28,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:45:28,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:28,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-18 02:45:28,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:29,373 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:29,375 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 142 proven. 118 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2022-03-18 02:45:29,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:34,058 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:34,061 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:37,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:37,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371690247] [2022-03-18 02:45:37,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:37,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374002221] [2022-03-18 02:45:37,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374002221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:45:37,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:45:37,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-18 02:45:37,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:37,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [977848316] [2022-03-18 02:45:37,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [977848316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:37,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:37,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 02:45:37,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923032597] [2022-03-18 02:45:37,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:37,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 02:45:37,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:37,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 02:45:37,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:45:37,230 INFO L87 Difference]: Start difference. First operand 383 states and 500 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-18 02:45:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:41,511 INFO L93 Difference]: Finished difference Result 427 states and 561 transitions. [2022-03-18 02:45:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:45:41,512 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) Word has length 160 [2022-03-18 02:45:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:41,513 INFO L225 Difference]: With dead ends: 427 [2022-03-18 02:45:41,514 INFO L226 Difference]: Without dead ends: 424 [2022-03-18 02:45:41,514 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:45:41,514 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 38 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:41,514 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 618 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 02:45:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-03-18 02:45:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 422. [2022-03-18 02:45:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 231 states have (on average 1.121212121212121) internal successors, (259), 232 states have internal predecessors, (259), 149 states have call successors, (149), 42 states have call predecessors, (149), 41 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-18 02:45:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 555 transitions. [2022-03-18 02:45:41,621 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 555 transitions. Word has length 160 [2022-03-18 02:45:41,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:41,622 INFO L478 AbstractCegarLoop]: Abstraction has 422 states and 555 transitions. [2022-03-18 02:45:41,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-18 02:45:41,622 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 555 transitions. [2022-03-18 02:45:41,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-18 02:45:41,623 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:41,623 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:45:41,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 02:45:41,838 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 [2022-03-18 02:45:41,839 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:41,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 15 times [2022-03-18 02:45:41,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:41,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [479175888] [2022-03-18 02:45:41,840 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 16 times [2022-03-18 02:45:41,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:41,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72547957] [2022-03-18 02:45:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:41,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:41,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:41,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132313412] [2022-03-18 02:45:41,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:45:41,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:41,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:41,847 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) [2022-03-18 02:45:41,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 02:45:41,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:45:41,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:41,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 02:45:41,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:42,682 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:42,857 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 177 proven. 122 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2022-03-18 02:45:44,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 202 proven. 12 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2022-03-18 02:45:46,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72547957] [2022-03-18 02:45:46,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132313412] [2022-03-18 02:45:46,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132313412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:45:46,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:45:46,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 23 [2022-03-18 02:45:46,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:46,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [479175888] [2022-03-18 02:45:46,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [479175888] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:46,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:46,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 02:45:46,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860009046] [2022-03-18 02:45:46,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:46,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 02:45:46,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:46,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 02:45:46,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-18 02:45:46,098 INFO L87 Difference]: Start difference. First operand 422 states and 555 transitions. Second operand has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-18 02:45:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:47,178 INFO L93 Difference]: Finished difference Result 471 states and 620 transitions. [2022-03-18 02:45:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:45:47,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 160 [2022-03-18 02:45:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:47,184 INFO L225 Difference]: With dead ends: 471 [2022-03-18 02:45:47,184 INFO L226 Difference]: Without dead ends: 468 [2022-03-18 02:45:47,185 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-18 02:45:47,185 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:47,185 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 716 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:45:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-03-18 02:45:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 465. [2022-03-18 02:45:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 254 states have (on average 1.1220472440944882) internal successors, (285), 255 states have internal predecessors, (285), 165 states have call successors, (165), 46 states have call predecessors, (165), 45 states have return successors, (163), 163 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-18 02:45:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 613 transitions. [2022-03-18 02:45:47,286 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 613 transitions. Word has length 160 [2022-03-18 02:45:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:47,286 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 613 transitions. [2022-03-18 02:45:47,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-18 02:45:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 613 transitions. [2022-03-18 02:45:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-03-18 02:45:47,288 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:47,288 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:45:47,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 02:45:47,497 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 [2022-03-18 02:45:47,497 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:47,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:47,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 15 times [2022-03-18 02:45:47,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:47,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910537455] [2022-03-18 02:45:47,498 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:47,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 16 times [2022-03-18 02:45:47,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:47,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018884675] [2022-03-18 02:45:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:47,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:47,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:47,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592130676] [2022-03-18 02:45:47,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:45:47,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:47,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:47,507 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) [2022-03-18 02:45:47,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 02:45:47,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:45:47,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:47,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-18 02:45:47,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 162 proven. 112 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2022-03-18 02:45:49,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 108 proven. 94 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2022-03-18 02:45:51,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:51,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018884675] [2022-03-18 02:45:51,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:51,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592130676] [2022-03-18 02:45:51,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592130676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:45:51,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:45:51,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-03-18 02:45:51,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:51,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1910537455] [2022-03-18 02:45:51,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1910537455] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:51,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:51,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 02:45:51,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278116076] [2022-03-18 02:45:51,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:51,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 02:45:51,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:51,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 02:45:51,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 02:45:51,681 INFO L87 Difference]: Start difference. First operand 465 states and 613 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2022-03-18 02:45:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:53,142 INFO L93 Difference]: Finished difference Result 511 states and 668 transitions. [2022-03-18 02:45:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 02:45:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) Word has length 174 [2022-03-18 02:45:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:53,145 INFO L225 Difference]: With dead ends: 511 [2022-03-18 02:45:53,145 INFO L226 Difference]: Without dead ends: 509 [2022-03-18 02:45:53,146 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 312 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 02:45:53,146 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 62 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:53,146 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 595 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 02:45:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-03-18 02:45:53,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 488. [2022-03-18 02:45:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 270 states have (on average 1.114814814814815) internal successors, (301), 272 states have internal predecessors, (301), 168 states have call successors, (168), 50 states have call predecessors, (168), 49 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-18 02:45:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 635 transitions. [2022-03-18 02:45:53,272 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 635 transitions. Word has length 174 [2022-03-18 02:45:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:53,272 INFO L478 AbstractCegarLoop]: Abstraction has 488 states and 635 transitions. [2022-03-18 02:45:53,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2022-03-18 02:45:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 635 transitions. [2022-03-18 02:45:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-18 02:45:53,274 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:53,274 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 1, 1] [2022-03-18 02:45:53,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 02:45:53,487 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 [2022-03-18 02:45:53,487 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 17 times [2022-03-18 02:45:53,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:53,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1879636139] [2022-03-18 02:45:53,488 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 18 times [2022-03-18 02:45:53,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:53,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440492488] [2022-03-18 02:45:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:53,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:53,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:53,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564099384] [2022-03-18 02:45:53,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:45:53,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:53,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:53,511 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) [2022-03-18 02:45:53,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 02:45:54,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:45:54,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-18 02:45:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:56,002 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:46:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 176 proven. 91 refuted. 0 times theorem prover too weak. 943 trivial. 0 not checked. [2022-03-18 02:46:04,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:46:17,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:46:17,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440492488] [2022-03-18 02:46:17,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:46:17,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564099384] [2022-03-18 02:46:17,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564099384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:46:17,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:46:17,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-18 02:46:17,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:46:17,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1879636139] [2022-03-18 02:46:17,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1879636139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:46:17,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:46:17,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:46:17,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532030672] [2022-03-18 02:46:17,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:46:17,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:46:17,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:17,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:46:17,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=562, Unknown=1, NotChecked=0, Total=702 [2022-03-18 02:46:17,749 INFO L87 Difference]: Start difference. First operand 488 states and 635 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) [2022-03-18 02:46:18,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:46:18,755 INFO L93 Difference]: Finished difference Result 510 states and 659 transitions. [2022-03-18 02:46:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 02:46:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) Word has length 176 [2022-03-18 02:46:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:46:18,759 INFO L225 Difference]: With dead ends: 510 [2022-03-18 02:46:18,759 INFO L226 Difference]: Without dead ends: 508 [2022-03-18 02:46:18,760 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=171, Invalid=758, Unknown=1, NotChecked=0, Total=930 [2022-03-18 02:46:18,760 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 19 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:46:18,761 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 347 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 296 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-03-18 02:46:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-03-18 02:46:18,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2022-03-18 02:46:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 283 states have (on average 1.1130742049469964) internal successors, (315), 286 states have internal predecessors, (315), 172 states have call successors, (172), 53 states have call predecessors, (172), 52 states have return successors, (170), 168 states have call predecessors, (170), 170 states have call successors, (170) [2022-03-18 02:46:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 657 transitions. [2022-03-18 02:46:18,917 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 657 transitions. Word has length 176 [2022-03-18 02:46:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:46:18,917 INFO L478 AbstractCegarLoop]: Abstraction has 508 states and 657 transitions. [2022-03-18 02:46:18,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) [2022-03-18 02:46:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 657 transitions. [2022-03-18 02:46:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-18 02:46:18,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:46:18,919 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:46:18,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 02:46:19,126 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 [2022-03-18 02:46:19,126 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:46:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:46:19,127 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 19 times [2022-03-18 02:46:19,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:19,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1426574982] [2022-03-18 02:46:19,127 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:46:19,127 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 20 times [2022-03-18 02:46:19,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:46:19,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469930445] [2022-03-18 02:46:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:46:19,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:46:19,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:46:19,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526697686] [2022-03-18 02:46:19,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:46:19,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:46:19,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:46:19,136 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) [2022-03-18 02:46:19,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 02:46:19,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:46:19,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:46:19,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 119 conjunts are in the unsatisfiable core [2022-03-18 02:46:19,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:46:21,097 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:46:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 196 proven. 280 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2022-03-18 02:46:23,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:46:31,572 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:16,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:47:16,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469930445] [2022-03-18 02:47:16,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:47:16,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526697686] [2022-03-18 02:47:16,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526697686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:47:16,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:47:16,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-18 02:47:16,036 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:47:16,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1426574982] [2022-03-18 02:47:16,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1426574982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:47:16,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:47:16,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 02:47:16,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955454229] [2022-03-18 02:47:16,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:47:16,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 02:47:16,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:47:16,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 02:47:16,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=881, Unknown=2, NotChecked=0, Total=1122 [2022-03-18 02:47:16,038 INFO L87 Difference]: Start difference. First operand 508 states and 657 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-18 02:47:18,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:47:18,350 INFO L93 Difference]: Finished difference Result 522 states and 669 transitions. [2022-03-18 02:47:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 02:47:18,351 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 179 [2022-03-18 02:47:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:47:18,353 INFO L225 Difference]: With dead ends: 522 [2022-03-18 02:47:18,353 INFO L226 Difference]: Without dead ends: 520 [2022-03-18 02:47:18,354 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=323, Invalid=1315, Unknown=2, NotChecked=0, Total=1640 [2022-03-18 02:47:18,355 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 62 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:47:18,355 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 428 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 865 Invalid, 0 Unknown, 179 Unchecked, 0.6s Time] [2022-03-18 02:47:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-18 02:47:18,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 516. [2022-03-18 02:47:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 289 states have (on average 1.1107266435986158) internal successors, (321), 292 states have internal predecessors, (321), 172 states have call successors, (172), 55 states have call predecessors, (172), 54 states have return successors, (170), 168 states have call predecessors, (170), 170 states have call successors, (170) [2022-03-18 02:47:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 663 transitions. [2022-03-18 02:47:18,483 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 663 transitions. Word has length 179 [2022-03-18 02:47:18,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:47:18,483 INFO L478 AbstractCegarLoop]: Abstraction has 516 states and 663 transitions. [2022-03-18 02:47:18,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-18 02:47:18,483 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 663 transitions. [2022-03-18 02:47:18,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-18 02:47:18,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:47:18,485 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:47:18,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 02:47:18,699 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 [2022-03-18 02:47:18,699 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:47:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:47:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 17 times [2022-03-18 02:47:18,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:47:18,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1141286756] [2022-03-18 02:47:18,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:47:18,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 18 times [2022-03-18 02:47:18,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:47:18,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877772686] [2022-03-18 02:47:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:47:18,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:47:18,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:47:18,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180421318] [2022-03-18 02:47:18,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:47:18,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:47:18,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:47:18,712 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) [2022-03-18 02:47:18,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 02:47:18,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:47:18,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:47:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 02:47:18,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:47:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 107 proven. 63 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2022-03-18 02:47:19,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:47:19,753 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:19,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:47:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877772686] [2022-03-18 02:47:19,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:47:19,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180421318] [2022-03-18 02:47:19,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180421318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:47:19,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:47:19,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 02:47:19,823 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:47:19,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1141286756] [2022-03-18 02:47:19,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1141286756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:47:19,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:47:19,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:47:19,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516665686] [2022-03-18 02:47:19,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:47:19,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:47:19,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:47:19,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:47:19,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:47:19,827 INFO L87 Difference]: Start difference. First operand 516 states and 663 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) 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, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 02:47:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:47:20,259 INFO L93 Difference]: Finished difference Result 525 states and 671 transitions. [2022-03-18 02:47:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:47:20,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) 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, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 182 [2022-03-18 02:47:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:47:20,262 INFO L225 Difference]: With dead ends: 525 [2022-03-18 02:47:20,262 INFO L226 Difference]: Without dead ends: 522 [2022-03-18 02:47:20,262 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:47:20,263 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:47:20,263 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 306 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:47:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-03-18 02:47:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 499. [2022-03-18 02:47:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 280 states have (on average 1.1071428571428572) internal successors, (310), 282 states have internal predecessors, (310), 165 states have call successors, (165), 54 states have call predecessors, (165), 53 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-18 02:47:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 638 transitions. [2022-03-18 02:47:20,404 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 638 transitions. Word has length 182 [2022-03-18 02:47:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:47:20,405 INFO L478 AbstractCegarLoop]: Abstraction has 499 states and 638 transitions. [2022-03-18 02:47:20,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) 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, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 02:47:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 638 transitions. [2022-03-18 02:47:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-18 02:47:20,414 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:47:20,414 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:47:20,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 02:47:20,631 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 [2022-03-18 02:47:20,631 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:47:20,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:47:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 19 times [2022-03-18 02:47:20,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:47:20,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1019898941] [2022-03-18 02:47:20,632 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:47:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 20 times [2022-03-18 02:47:20,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:47:20,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260684179] [2022-03-18 02:47:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:47:20,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:47:20,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:47:20,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532718343] [2022-03-18 02:47:20,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:47:20,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:47:20,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:47:20,639 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) [2022-03-18 02:47:20,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 02:47:20,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:47:20,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:47:20,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-18 02:47:20,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:47:21,735 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:21,737 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:21,739 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:21,748 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:21,769 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:21,771 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:27,002 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((main_~k~0 Int)) (let ((.cse0 (* (- 1) c_main_~q~0))) (and (= (mod .cse0 main_~k~0) 0) (not (= main_~k~0 0)) (let ((.cse9 (div .cse0 main_~k~0))) (let ((.cse8 (* .cse9 c_main_~x~0))) (let ((.cse6 (= c_main_~y~0 0)) (.cse5 (* 3 .cse8)) (.cse3 (* main_~k~0 .cse9 c_main_~x~0)) (.cse7 (+ (* (- 1) main_~k~0 .cse9 c_main_~x~0) (* (- 1) c_main_~b~0) c_main_~y~0))) (or (let ((.cse1 (+ (* (- 1) c_main_~s~0) 1))) (let ((.cse2 (div .cse1 main_~k~0))) (let ((.cse4 (* .cse2 c_main_~y~0))) (and (= (mod .cse1 main_~k~0) 0) (= (+ (* .cse2 main_~k~0 c_main_~y~0) .cse3) (+ (* 3 .cse4) .cse5)) .cse6 (= .cse7 0) (= (+ .cse4 .cse8) (+ (* c_main_~b~0 .cse2) (* .cse2 .cse2 main_~k~0 c_main_~y~0) (* .cse2 main_~k~0 .cse9 c_main_~x~0) c_main_~x~0)))))) (let ((.cse10 (* main_~k~0 c_main_~y~0))) (let ((.cse15 (div .cse7 .cse10))) (let ((.cse12 (* .cse15 main_~k~0 c_main_~y~0)) (.cse11 (* c_main_~b~0 .cse15)) (.cse13 (* .cse15 .cse15 main_~k~0 c_main_~y~0)) (.cse14 (* .cse15 main_~k~0 .cse9 c_main_~x~0)) (.cse16 (* .cse15 c_main_~y~0))) (and (= (mod .cse7 .cse10) 0) (not .cse6) (= (+ c_main_~b~0 .cse11 .cse12 .cse13 .cse14 .cse3) 0) (= (+ (* .cse15 main_~k~0) c_main_~s~0) 1) (= (+ .cse5 (* 3 .cse16)) (+ .cse12 .cse3)) (= (+ .cse11 .cse13 .cse14 c_main_~x~0) (+ .cse8 .cse16))))))))))))) (and (let ((.cse17 (= c_main_~b~0 0)) (.cse20 (= c_main_~b~0 c_main_~y~0))) (or (and .cse17 (exists ((v_main_~q~0_107 Int) (v_main_~s~0_107 Int)) (let ((.cse19 (* v_main_~s~0_107 c_main_~y~0)) (.cse18 (* v_main_~q~0_107 c_main_~x~0))) (and (= (+ .cse18 .cse19) (+ (* v_main_~s~0_107 c_main_~b~0) c_main_~x~0)) (= 0 (+ (* .cse19 3) (* .cse18 3)))))) .cse20) (and (= (let ((.cse21 (div (* (- 1) c_main_~b~0) c_main_~b~0))) (+ (* (* (div (+ (* c_main_~b~0 .cse21) (* (- 1) .cse21 c_main_~y~0) c_main_~x~0) c_main_~x~0) c_main_~x~0) 3) (* (* .cse21 c_main_~y~0) 3))) 0) (not .cse17) .cse20))) (= (* (- 1) c_main_~q~0) 0) (= c_main_~s~0 1))) is different from true [2022-03-18 02:47:34,915 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:34,951 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:42,154 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 220 proven. 206 refuted. 0 times theorem prover too weak. 879 trivial. 4 not checked. [2022-03-18 02:47:45,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:47:49,647 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:47:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 250 proven. 12 refuted. 0 times theorem prover too weak. 1047 trivial. 0 not checked. [2022-03-18 02:47:50,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:47:50,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260684179] [2022-03-18 02:47:50,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:47:50,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532718343] [2022-03-18 02:47:50,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532718343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:47:50,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:47:50,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 26 [2022-03-18 02:47:50,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:47:50,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1019898941] [2022-03-18 02:47:50,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1019898941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:47:50,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:47:50,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 02:47:50,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574114422] [2022-03-18 02:47:50,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:47:50,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 02:47:50,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:47:50,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 02:47:50,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=524, Unknown=1, NotChecked=46, Total=650 [2022-03-18 02:47:50,011 INFO L87 Difference]: Start difference. First operand 499 states and 638 transitions. Second operand has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-18 02:47:56,477 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 [] [2022-03-18 02:48:02,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:48:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:48:03,764 INFO L93 Difference]: Finished difference Result 516 states and 660 transitions. [2022-03-18 02:48:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 02:48:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) Word has length 182 [2022-03-18 02:48:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:48:03,767 INFO L225 Difference]: With dead ends: 516 [2022-03-18 02:48:03,767 INFO L226 Difference]: Without dead ends: 509 [2022-03-18 02:48:03,768 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=122, Invalid=750, Unknown=2, NotChecked=56, Total=930 [2022-03-18 02:48:03,768 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 29 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:48:03,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 789 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 912 Invalid, 1 Unknown, 245 Unchecked, 4.9s Time] [2022-03-18 02:48:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-03-18 02:48:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 508. [2022-03-18 02:48:03,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 285 states have (on average 1.1087719298245613) internal successors, (316), 287 states have internal predecessors, (316), 169 states have call successors, (169), 54 states have call predecessors, (169), 53 states have return successors, (167), 166 states have call predecessors, (167), 167 states have call successors, (167) [2022-03-18 02:48:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 652 transitions. [2022-03-18 02:48:03,919 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 652 transitions. Word has length 182 [2022-03-18 02:48:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:48:03,919 INFO L478 AbstractCegarLoop]: Abstraction has 508 states and 652 transitions. [2022-03-18 02:48:03,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-18 02:48:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 652 transitions. [2022-03-18 02:48:03,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-18 02:48:03,921 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:48:03,921 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:48:03,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 02:48:04,144 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 [2022-03-18 02:48:04,145 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:48:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:48:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash -804600145, now seen corresponding path program 21 times [2022-03-18 02:48:04,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:48:04,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308586416] [2022-03-18 02:48:04,146 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:48:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash -804600145, now seen corresponding path program 22 times [2022-03-18 02:48:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:48:04,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110163208] [2022-03-18 02:48:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:48:04,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:48:04,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:48:04,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092232771] [2022-03-18 02:48:04,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:48:04,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:48:04,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:48:04,154 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) [2022-03-18 02:48:04,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 02:48:04,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:48:04,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:48:04,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-18 02:48:04,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:48:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 246 proven. 238 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2022-03-18 02:48:09,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:48:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 250 proven. 12 refuted. 0 times theorem prover too weak. 1047 trivial. 0 not checked. [2022-03-18 02:48:11,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:48:11,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110163208] [2022-03-18 02:48:11,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:48:11,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092232771] [2022-03-18 02:48:11,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092232771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:48:11,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:48:11,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 30 [2022-03-18 02:48:11,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:48:11,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308586416] [2022-03-18 02:48:11,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308586416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:48:11,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:48:11,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 02:48:11,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489770684] [2022-03-18 02:48:11,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:48:11,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 02:48:11,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:48:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 02:48:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:48:11,975 INFO L87 Difference]: Start difference. First operand 508 states and 652 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-18 02:48:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:48:16,787 INFO L93 Difference]: Finished difference Result 597 states and 773 transitions. [2022-03-18 02:48:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 02:48:16,787 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) Word has length 182 [2022-03-18 02:48:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:48:16,791 INFO L225 Difference]: With dead ends: 597 [2022-03-18 02:48:16,791 INFO L226 Difference]: Without dead ends: 594 [2022-03-18 02:48:16,791 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 331 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 02:48:16,792 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 53 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:48:16,792 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 600 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-18 02:48:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-03-18 02:48:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 561. [2022-03-18 02:48:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 313 states have (on average 1.1118210862619808) internal successors, (348), 315 states have internal predecessors, (348), 189 states have call successors, (189), 59 states have call predecessors, (189), 58 states have return successors, (187), 186 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-18 02:48:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 724 transitions. [2022-03-18 02:48:16,933 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 724 transitions. Word has length 182 [2022-03-18 02:48:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:48:16,934 INFO L478 AbstractCegarLoop]: Abstraction has 561 states and 724 transitions. [2022-03-18 02:48:16,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-18 02:48:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 724 transitions. [2022-03-18 02:48:16,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-18 02:48:16,936 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:48:16,936 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 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] [2022-03-18 02:48:16,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 02:48:17,151 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 [2022-03-18 02:48:17,151 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:48:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:48:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash 581430734, now seen corresponding path program 23 times [2022-03-18 02:48:17,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:48:17,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [754849824] [2022-03-18 02:48:17,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:48:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash 581430734, now seen corresponding path program 24 times [2022-03-18 02:48:17,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:48:17,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989992606] [2022-03-18 02:48:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:48:17,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:48:17,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:48:17,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736643741] [2022-03-18 02:48:17,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:48:17,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:48:17,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:48:17,164 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) [2022-03-18 02:48:17,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 02:48:18,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:48:18,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:48:18,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 02:48:18,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:48:18,858 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:48:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 216 proven. 68 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2022-03-18 02:48:20,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:48:21,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:48:21,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989992606] [2022-03-18 02:48:21,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:48:21,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736643741] [2022-03-18 02:48:21,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736643741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:48:21,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:48:21,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-18 02:48:21,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:48:21,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [754849824] [2022-03-18 02:48:21,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [754849824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:48:21,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:48:21,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:48:21,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546503845] [2022-03-18 02:48:21,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:48:21,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:48:21,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:48:21,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:48:21,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:48:21,328 INFO L87 Difference]: Start difference. First operand 561 states and 724 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-18 02:48:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:48:24,769 INFO L93 Difference]: Finished difference Result 640 states and 849 transitions. [2022-03-18 02:48:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 02:48:24,769 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 185 [2022-03-18 02:48:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:48:24,773 INFO L225 Difference]: With dead ends: 640 [2022-03-18 02:48:24,773 INFO L226 Difference]: Without dead ends: 633 [2022-03-18 02:48:24,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=119, Invalid=692, Unknown=1, NotChecked=0, Total=812 [2022-03-18 02:48:24,774 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 26 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:48:24,774 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 415 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 490 Invalid, 0 Unknown, 58 Unchecked, 1.1s Time] [2022-03-18 02:48:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-03-18 02:48:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 615. [2022-03-18 02:48:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 331 states have (on average 1.1329305135951662) internal successors, (375), 333 states have internal predecessors, (375), 225 states have call successors, (225), 59 states have call predecessors, (225), 58 states have return successors, (223), 222 states have call predecessors, (223), 223 states have call successors, (223) [2022-03-18 02:48:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 823 transitions. [2022-03-18 02:48:24,926 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 823 transitions. Word has length 185 [2022-03-18 02:48:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:48:24,926 INFO L478 AbstractCegarLoop]: Abstraction has 615 states and 823 transitions. [2022-03-18 02:48:24,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-18 02:48:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 823 transitions. [2022-03-18 02:48:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-18 02:48:24,928 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:48:24,929 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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] [2022-03-18 02:48:24,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 02:48:25,135 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 [2022-03-18 02:48:25,135 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:48:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:48:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1344592104, now seen corresponding path program 21 times [2022-03-18 02:48:25,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:48:25,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2140732923] [2022-03-18 02:48:25,136 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:48:25,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1344592104, now seen corresponding path program 22 times [2022-03-18 02:48:25,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:48:25,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150998405] [2022-03-18 02:48:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:48:25,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:48:25,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:48:25,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036230124] [2022-03-18 02:48:25,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:48:25,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:48:25,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:48:25,143 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) [2022-03-18 02:48:25,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 02:48:25,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:48:25,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:48:25,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-18 02:48:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:48:26,619 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:48:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 243 proven. 218 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2022-03-18 02:48:27,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:48:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 183 proven. 134 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2022-03-18 02:48:30,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:48:30,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150998405] [2022-03-18 02:48:30,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:48:30,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036230124] [2022-03-18 02:48:30,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036230124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:48:30,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:48:30,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 36 [2022-03-18 02:48:30,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:48:30,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2140732923] [2022-03-18 02:48:30,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2140732923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:48:30,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:48:30,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 02:48:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377307798] [2022-03-18 02:48:30,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:48:30,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 02:48:30,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:48:30,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 02:48:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 02:48:30,755 INFO L87 Difference]: Start difference. First operand 615 states and 823 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-03-18 02:48:33,698 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 [] [2022-03-18 02:48:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:48:35,394 INFO L93 Difference]: Finished difference Result 660 states and 884 transitions. [2022-03-18 02:48:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 02:48:35,395 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 193 [2022-03-18 02:48:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:48:35,397 INFO L225 Difference]: With dead ends: 660 [2022-03-18 02:48:35,397 INFO L226 Difference]: Without dead ends: 658 [2022-03-18 02:48:35,397 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 345 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=332, Invalid=1390, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 02:48:35,398 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:48:35,398 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 516 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1193 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-03-18 02:48:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-03-18 02:48:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 619. [2022-03-18 02:48:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 334 states have (on average 1.1317365269461077) internal successors, (378), 336 states have internal predecessors, (378), 225 states have call successors, (225), 60 states have call predecessors, (225), 59 states have return successors, (223), 222 states have call predecessors, (223), 223 states have call successors, (223) [2022-03-18 02:48:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 826 transitions. [2022-03-18 02:48:35,556 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 826 transitions. Word has length 193 [2022-03-18 02:48:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:48:35,557 INFO L478 AbstractCegarLoop]: Abstraction has 619 states and 826 transitions. [2022-03-18 02:48:35,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-03-18 02:48:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 826 transitions. [2022-03-18 02:48:35,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-03-18 02:48:35,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:48:35,559 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:48:35,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 02:48:35,775 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 [2022-03-18 02:48:35,775 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:48:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:48:35,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1655342009, now seen corresponding path program 23 times [2022-03-18 02:48:35,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:48:35,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1824710447] [2022-03-18 02:48:35,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:48:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1655342009, now seen corresponding path program 24 times [2022-03-18 02:48:35,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:48:35,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74972781] [2022-03-18 02:48:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:48:35,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:48:35,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:48:35,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026568392] [2022-03-18 02:48:35,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:48:35,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:48:35,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:48:35,784 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) [2022-03-18 02:48:35,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 02:48:37,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:48:37,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:48:37,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-18 02:48:37,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:48:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 241 proven. 83 refuted. 0 times theorem prover too weak. 1217 trivial. 0 not checked. [2022-03-18 02:48:38,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:48:38,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:48:38,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74972781] [2022-03-18 02:48:38,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:48:38,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026568392] [2022-03-18 02:48:38,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026568392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:48:38,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:48:38,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-18 02:48:38,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:48:38,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1824710447] [2022-03-18 02:48:38,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1824710447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:48:38,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:48:38,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:48:38,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019537096] [2022-03-18 02:48:38,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:48:38,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:48:38,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:48:38,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:48:38,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:48:38,993 INFO L87 Difference]: Start difference. First operand 619 states and 826 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-18 02:48:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:48:40,484 INFO L93 Difference]: Finished difference Result 664 states and 881 transitions. [2022-03-18 02:48:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 02:48:40,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 196 [2022-03-18 02:48:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:48:40,487 INFO L225 Difference]: With dead ends: 664 [2022-03-18 02:48:40,487 INFO L226 Difference]: Without dead ends: 662 [2022-03-18 02:48:40,487 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-18 02:48:40,488 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 30 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:48:40,488 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 453 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 503 Invalid, 0 Unknown, 115 Unchecked, 1.0s Time] [2022-03-18 02:48:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-18 02:48:40,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 634. [2022-03-18 02:48:40,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 342 states have (on average 1.128654970760234) internal successors, (386), 346 states have internal predecessors, (386), 231 states have call successors, (231), 61 states have call predecessors, (231), 60 states have return successors, (229), 226 states have call predecessors, (229), 229 states have call successors, (229) [2022-03-18 02:48:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 846 transitions. [2022-03-18 02:48:40,718 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 846 transitions. Word has length 196 [2022-03-18 02:48:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:48:40,718 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 846 transitions. [2022-03-18 02:48:40,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-18 02:48:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 846 transitions. [2022-03-18 02:48:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-03-18 02:48:40,721 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:48:40,721 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:48:40,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-18 02:48:40,927 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 [2022-03-18 02:48:40,927 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:48:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:48:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash -908928347, now seen corresponding path program 25 times [2022-03-18 02:48:40,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:48:40,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [397457467] [2022-03-18 02:48:40,928 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:48:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash -908928347, now seen corresponding path program 26 times [2022-03-18 02:48:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:48:40,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421362226] [2022-03-18 02:48:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:48:40,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:48:40,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:48:40,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601221028] [2022-03-18 02:48:40,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:48:40,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:48:40,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:48:40,936 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:48:40,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 02:48:41,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:48:41,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:48:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 110 conjunts are in the unsatisfiable core [2022-03-18 02:48:41,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:48:41,766 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:48:41,767 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:48:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 193 proven. 348 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2022-03-18 02:48:42,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:48:43,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:48:43,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421362226] [2022-03-18 02:48:43,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:48:43,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601221028] [2022-03-18 02:48:43,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601221028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:48:43,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:48:43,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-18 02:48:43,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:48:43,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [397457467] [2022-03-18 02:48:43,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [397457467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:48:43,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:48:43,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 02:48:43,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292324029] [2022-03-18 02:48:43,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:48:43,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 02:48:43,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:48:43,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 02:48:43,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-18 02:48:43,644 INFO L87 Difference]: Start difference. First operand 634 states and 846 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 13 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 12 states have call predecessors, (33), 13 states have call successors, (33) [2022-03-18 02:48:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:48:44,757 INFO L93 Difference]: Finished difference Result 684 states and 911 transitions. [2022-03-18 02:48:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 02:48:44,759 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 13 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 12 states have call predecessors, (33), 13 states have call successors, (33) Word has length 196 [2022-03-18 02:48:44,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:48:44,762 INFO L225 Difference]: With dead ends: 684 [2022-03-18 02:48:44,762 INFO L226 Difference]: Without dead ends: 682 [2022-03-18 02:48:44,762 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-03-18 02:48:44,763 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 41 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 02:48:44,763 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 794 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 02:48:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-03-18 02:48:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 654. [2022-03-18 02:48:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 355 states have (on average 1.123943661971831) internal successors, (399), 360 states have internal predecessors, (399), 235 states have call successors, (235), 64 states have call predecessors, (235), 63 states have return successors, (233), 229 states have call predecessors, (233), 233 states have call successors, (233) [2022-03-18 02:48:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 867 transitions. [2022-03-18 02:48:44,948 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 867 transitions. Word has length 196 [2022-03-18 02:48:44,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:48:44,949 INFO L478 AbstractCegarLoop]: Abstraction has 654 states and 867 transitions. [2022-03-18 02:48:44,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 13 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 12 states have call predecessors, (33), 13 states have call successors, (33) [2022-03-18 02:48:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 867 transitions. [2022-03-18 02:48:44,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-03-18 02:48:44,951 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:48:44,951 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:48:44,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-18 02:48:45,158 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:48:45,158 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:48:45,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:48:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash -947049337, now seen corresponding path program 27 times [2022-03-18 02:48:45,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:48:45,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [54431621] [2022-03-18 02:48:45,159 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:48:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash -947049337, now seen corresponding path program 28 times [2022-03-18 02:48:45,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:48:45,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464887372] [2022-03-18 02:48:45,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:48:45,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:48:45,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:48:45,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901864764] [2022-03-18 02:48:45,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:48:45,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:48:45,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:48:45,167 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:48:45,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 02:48:45,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:48:45,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:48:45,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 145 conjunts are in the unsatisfiable core [2022-03-18 02:48:45,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:48:47,044 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:49:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 391 proven. 273 refuted. 0 times theorem prover too weak. 877 trivial. 0 not checked. [2022-03-18 02:49:24,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:49:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 347 proven. 21 refuted. 0 times theorem prover too weak. 1173 trivial. 0 not checked. [2022-03-18 02:49:32,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:49:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464887372] [2022-03-18 02:49:32,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:49:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901864764] [2022-03-18 02:49:32,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901864764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:49:32,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:49:32,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 12] total 35 [2022-03-18 02:49:32,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:49:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [54431621] [2022-03-18 02:49:32,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [54431621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:49:32,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:49:32,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 02:49:32,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938537109] [2022-03-18 02:49:32,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:49:32,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 02:49:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:32,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 02:49:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=985, Unknown=7, NotChecked=0, Total=1190 [2022-03-18 02:49:32,418 INFO L87 Difference]: Start difference. First operand 654 states and 867 transitions. Second operand has 27 states, 25 states have (on average 1.76) internal successors, (44), 20 states have internal predecessors, (44), 15 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 16 states have call predecessors, (33), 14 states have call successors, (33) [2022-03-18 02:49:47,885 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse29 (* (- 1) c_main_~y~0)) (.cse26 (+ c_main_~s~0 c_main_~r~0))) (let ((.cse25 (div (+ (* (- 1) .cse26 c_main_~y~0) .cse29) (* .cse26 c_main_~x~0))) (.cse28 (div (+ (* (- 1) c_main_~s~0 c_main_~y~0) .cse29 (* (- 1) c_main_~r~0 c_main_~y~0)) (+ (* c_main_~s~0 c_main_~x~0) (* c_main_~r~0 c_main_~x~0))))) (let ((.cse1 (* c_main_~s~0 .cse28 c_main_~x~0)) (.cse3 (* .cse28 c_main_~r~0 c_main_~x~0)) (.cse2 (* c_main_~s~0 c_main_~y~0)) (.cse0 (* c_main_~r~0 c_main_~y~0)) (.cse24 (* (- 1) .cse25 .cse26))) (let ((.cse27 (+ (- 1) .cse24 .cse25)) (.cse5 (* .cse26 c_main_~y~0)) (.cse4 (* (- 1) .cse0)) (.cse7 (* (- 1) .cse2)) (.cse8 (* (- 1) .cse3)) (.cse6 (* .cse25 .cse26 c_main_~x~0)) (.cse9 (* (- 1) .cse1))) (and (< (+ .cse0 .cse1 .cse2 c_main_~x~0 .cse3) (* 2 c_main_~a~0)) (= (+ .cse4 (* .cse5 2) (* 2 .cse6) .cse7 .cse8 c_main_~x~0 c_main_~a~0 .cse9) c_main_~y~0) (<= (+ c_main_~s~0 c_main_~r~0 1) 0) (<= c_main_~x~0 10) (exists ((main_~r~0 Int)) (let ((.cse21 (+ c_main_~s~0 main_~r~0)) (.cse23 (* (- 1) c_main_~y~0))) (let ((.cse22 (div (+ (* (- 1) c_main_~s~0 c_main_~y~0) (* (- 1) main_~r~0 c_main_~y~0) .cse23) (+ (* c_main_~s~0 c_main_~x~0) (* main_~r~0 c_main_~x~0)))) (.cse16 (div (+ .cse23 (* (- 1) .cse21 c_main_~y~0)) (* .cse21 c_main_~x~0)))) (let ((.cse15 (* (- 1) .cse21 .cse16)) (.cse13 (* (- 1) c_main_~b~0)) (.cse14 (* .cse21 c_main_~x~0 .cse16)) (.cse18 (* 2 c_main_~x~0)) (.cse12 (* .cse21 c_main_~y~0)) (.cse19 (* main_~r~0 .cse22 c_main_~x~0)) (.cse20 (* c_main_~s~0 .cse22 c_main_~x~0)) (.cse11 (* main_~r~0 c_main_~y~0)) (.cse17 (* c_main_~s~0 c_main_~y~0))) (and (let ((.cse10 (+ (- 1) .cse15 .cse16))) (= (+ (* .cse10 c_main_~x~0) .cse11 (* (+ .cse12 .cse13 .cse14 c_main_~x~0) c_main_~y~0)) (+ .cse12 (* main_~r~0 c_main_~y~0 c_main_~y~0) .cse13 .cse14 c_main_~x~0 (* .cse10 c_main_~x~0 c_main_~y~0)))) (<= (+ c_main_~s~0 main_~r~0 1) 0) (< c_main_~y~0 (+ (* .cse11 2) (* 2 .cse17) .cse18 (* .cse19 2) (* .cse20 2))) (= (+ (* .cse21 .cse16) 1) (+ (- 1) .cse15 c_main_~q~0 .cse16)) (= (+ .cse13 (* .cse14 2) .cse18 (* .cse12 2)) c_main_~y~0) (< (* c_main_~b~0 2) (+ .cse19 .cse20 .cse11 .cse17 c_main_~x~0))))))) (= (+ (- 1) .cse24 c_main_~q~0 .cse25) (+ (* .cse25 .cse26) 1)) (= c_main_~p~0 .cse27) (= (+ .cse0 (* (+ .cse5 .cse4 .cse7 .cse8 .cse6 c_main_~a~0 .cse9) c_main_~y~0) (* c_main_~x~0 .cse27)) (+ (* c_main_~x~0 .cse27 c_main_~y~0) .cse5 .cse4 .cse7 .cse8 .cse6 c_main_~a~0 .cse9 (* c_main_~r~0 c_main_~y~0 c_main_~y~0))) (< c_main_~y~0 (+ (* 2 .cse2) (* 2 c_main_~x~0) (* 2 .cse1) (* 2 .cse0) (* 2 .cse3))) (= (+ (* (- 1) c_main_~a~0) .cse0 .cse1 .cse2 c_main_~x~0 .cse3) c_main_~b~0)))))) is different from false [2022-03-18 02:49:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:49:50,119 INFO L93 Difference]: Finished difference Result 717 states and 955 transitions. [2022-03-18 02:49:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 02:49:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 20 states have internal predecessors, (44), 15 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 16 states have call predecessors, (33), 14 states have call successors, (33) Word has length 196 [2022-03-18 02:49:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:49:50,123 INFO L225 Difference]: With dead ends: 717 [2022-03-18 02:49:50,123 INFO L226 Difference]: Without dead ends: 715 [2022-03-18 02:49:50,124 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 354 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=293, Invalid=1595, Unknown=8, NotChecked=84, Total=1980 [2022-03-18 02:49:50,125 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 67 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:49:50,125 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 553 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1397 Invalid, 0 Unknown, 101 Unchecked, 6.9s Time] [2022-03-18 02:49:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-03-18 02:49:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 665. [2022-03-18 02:49:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 362 states have (on average 1.1215469613259668) internal successors, (406), 368 states have internal predecessors, (406), 238 states have call successors, (238), 65 states have call predecessors, (238), 64 states have return successors, (236), 231 states have call predecessors, (236), 236 states have call successors, (236) [2022-03-18 02:49:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 880 transitions. [2022-03-18 02:49:50,364 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 880 transitions. Word has length 196 [2022-03-18 02:49:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:49:50,364 INFO L478 AbstractCegarLoop]: Abstraction has 665 states and 880 transitions. [2022-03-18 02:49:50,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 20 states have internal predecessors, (44), 15 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 16 states have call predecessors, (33), 14 states have call successors, (33) [2022-03-18 02:49:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 880 transitions. [2022-03-18 02:49:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-18 02:49:50,366 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:49:50,367 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 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] [2022-03-18 02:49:50,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-18 02:49:50,572 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-18 02:49:50,572 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:49:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:49:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash -735172514, now seen corresponding path program 29 times [2022-03-18 02:49:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:50,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1103473434] [2022-03-18 02:49:50,573 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:49:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash -735172514, now seen corresponding path program 30 times [2022-03-18 02:49:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:49:50,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106999958] [2022-03-18 02:49:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:49:50,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:49:50,579 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:49:50,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267696871] [2022-03-18 02:49:50,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:49:50,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:50,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:49:50,581 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:49:50,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 02:49:50,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:49:50,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:49:50,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 02:49:50,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:49:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 157 proven. 10 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2022-03-18 02:49:50,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:49:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 157 proven. 10 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2022-03-18 02:49:51,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:49:51,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106999958] [2022-03-18 02:49:51,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:49:51,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267696871] [2022-03-18 02:49:51,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267696871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:49:51,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:49:51,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-18 02:49:51,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:49:51,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1103473434] [2022-03-18 02:49:51,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1103473434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:49:51,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:49:51,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 02:49:51,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389931368] [2022-03-18 02:49:51,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:49:51,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 02:49:51,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:51,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 02:49:51,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:49:51,253 INFO L87 Difference]: Start difference. First operand 665 states and 880 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-18 02:49:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:49:51,756 INFO L93 Difference]: Finished difference Result 687 states and 897 transitions. [2022-03-18 02:49:51,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 02:49:51,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 198 [2022-03-18 02:49:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:49:51,763 INFO L225 Difference]: With dead ends: 687 [2022-03-18 02:49:51,763 INFO L226 Difference]: Without dead ends: 685 [2022-03-18 02:49:51,763 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 387 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:49:51,764 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:49:51,764 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 178 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:49:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-03-18 02:49:52,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 685. [2022-03-18 02:49:52,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 377 states have (on average 1.1167108753315649) internal successors, (421), 383 states have internal predecessors, (421), 238 states have call successors, (238), 70 states have call predecessors, (238), 69 states have return successors, (236), 231 states have call predecessors, (236), 236 states have call successors, (236) [2022-03-18 02:49:52,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 895 transitions. [2022-03-18 02:49:52,041 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 895 transitions. Word has length 198 [2022-03-18 02:49:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:49:52,041 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 895 transitions. [2022-03-18 02:49:52,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-18 02:49:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 895 transitions. [2022-03-18 02:49:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-18 02:49:52,044 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:49:52,044 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:49:52,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-18 02:49:52,258 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-18 02:49:52,258 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:49:52,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:49:52,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1739662275, now seen corresponding path program 31 times [2022-03-18 02:49:52,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:52,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574504271] [2022-03-18 02:49:52,259 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:49:52,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1739662275, now seen corresponding path program 32 times [2022-03-18 02:49:52,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:49:52,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86978282] [2022-03-18 02:49:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:49:52,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:49:52,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:49:52,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666768098] [2022-03-18 02:49:52,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:49:52,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:52,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:49:52,267 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:49:52,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 02:49:52,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:49:52,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:49:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-18 02:49:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:49:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 258 proven. 162 refuted. 0 times theorem prover too weak. 1233 trivial. 0 not checked. [2022-03-18 02:49:55,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:50:27,477 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse9 (* c_main_~s~0 c_main_~k~0)) (.cse10 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse8 (+ (* (- 2) c_main_~p~0) c_main_~q~0 (* (- 2) .cse10))) (.cse7 (+ (* 2 .cse9) (* (- 2) c_main_~r~0) c_main_~s~0))) (let ((.cse5 (* .cse7 c_main_~y~0)) (.cse6 (* .cse8 c_main_~x~0)) (.cse2 (+ c_main_~p~0 .cse10)) (.cse3 (+ c_main_~r~0 (* (- 1) .cse9)))) (let ((.cse0 (* .cse3 c_main_~y~0)) (.cse1 (* .cse2 c_main_~x~0)) (.cse4 (+ .cse5 .cse6))) (or (not (= (+ .cse0 .cse1 (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse2) c_main_~c~0 (* c_main_~yy~0 .cse3)))) (<= (* 3 c_main_~c~0) c_main_~b~0) (not (= c_main_~c~0 (+ .cse0 .cse1))) (= .cse4 0) (= (+ .cse5 .cse6 (* .cse4 c_main_~y~0)) (+ .cse5 (* c_main_~yy~0 .cse7) .cse6 (* c_main_~xy~0 .cse8))) (not (<= (* 2 c_main_~c~0) c_main_~b~0)) (not (= .cse4 (+ c_main_~b~0 (* (- 2) c_main_~c~0))))))))) is different from true [2022-03-18 02:50:46,918 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse9 (* c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse8 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse13 (* c_main_~p~0 c_main_~x~0)) (.cse14 (* c_main_~r~0 c_main_~y~0))) (let ((.cse0 (* 2 .cse14)) (.cse1 (* 2 .cse13)) (.cse2 (* c_main_~q~0 c_main_~x~0)) (.cse3 (* c_main_~s~0 c_main_~y~0)) (.cse4 (* 2 .cse8)) (.cse5 (* 2 .cse9)) (.cse6 (* 2 c_main_~c~0)) (.cse11 (* c_main_~q~0 c_main_~xy~0 c_main_~k~0)) (.cse12 (* c_main_~yy~0 c_main_~s~0 c_main_~k~0)) (.cse10 (* c_main_~xy~0 c_main_~p~0)) (.cse7 (* c_main_~yy~0 c_main_~r~0))) (or (<= (* 3 c_main_~c~0) c_main_~b~0) (= (+ .cse0 .cse1) (+ .cse2 .cse3 .cse4 .cse5)) (not (= (+ c_main_~b~0 .cse0 .cse1) (+ .cse2 .cse6 .cse3 .cse4 .cse5))) (not (= (+ .cse7 .cse8 c_main_~c~0 .cse9 .cse10) (+ .cse11 .cse12 .cse13 .cse14 (* c_main_~c~0 c_main_~y~0)))) (< c_main_~b~0 .cse6) (= (+ (* 2 (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) (* 2 (* c_main_~p~0 c_main_~x~0 c_main_~y~0)) (* .cse11 2) (* .cse12 2)) (+ (* 2 .cse10) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* .cse7 2) (* (* c_main_~q~0 c_main_~x~0 c_main_~y~0 c_main_~k~0) 2) (* 2 (* c_main_~s~0 c_main_~y~0 c_main_~y~0 c_main_~k~0)) (* c_main_~s~0 c_main_~y~0 c_main_~y~0))) (not (= (+ .cse13 .cse14) (+ .cse8 c_main_~c~0 .cse9)))))) is different from true [2022-03-18 02:51:48,811 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse13 (* c_main_~p~0 c_main_~x~0)) (.cse14 (* c_main_~r~0 c_main_~y~0)) (.cse0 (+ c_main_~k~0 1))) (let ((.cse19 (* (- 1) c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse20 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse18 (* (- 1) c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse17 (* (- 1) c_main_~q~0 c_main_~x~0)) (.cse21 (* c_main_~q~0 c_main_~x~0 .cse0)) (.cse22 (* c_main_~s~0 c_main_~y~0 .cse0)) (.cse15 (* 2 .cse14)) (.cse16 (* 2 .cse13))) (let ((.cse9 (+ .cse15 .cse16)) (.cse7 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse8 (* c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse5 (* c_main_~q~0 c_main_~x~0)) (.cse10 (* 2 .cse22)) (.cse11 (* .cse21 2)) (.cse6 (* c_main_~s~0 c_main_~y~0)) (.cse3 (* c_main_~q~0 c_main_~xy~0 .cse0)) (.cse4 (* c_main_~yy~0 c_main_~s~0 .cse0)) (.cse12 (+ .cse19 .cse20 .cse18 .cse13 .cse14 .cse17)) (.cse2 (* c_main_~yy~0 c_main_~r~0)) (.cse1 (* c_main_~xy~0 c_main_~p~0))) (or (= (+ (* 2 (* c_main_~q~0 c_main_~x~0 c_main_~y~0 .cse0)) (* 2 .cse1) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* .cse2 2) (* c_main_~s~0 c_main_~y~0 c_main_~y~0) (* (* c_main_~s~0 c_main_~y~0 c_main_~y~0 .cse0) 2)) (+ (* 2 (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (* c_main_~q~0 c_main_~xy~0) (* .cse3 2) (* c_main_~yy~0 c_main_~s~0) (* 2 (* c_main_~p~0 c_main_~x~0 c_main_~y~0)) (* .cse4 2))) (< (+ (* .cse5 2) c_main_~b~0 (* 2 .cse6) (* 2 .cse7) (* 2 .cse8)) .cse9) (= .cse9 (+ .cse5 .cse10 .cse11 .cse6)) (not (= .cse12 (+ (* (- 1) c_main_~b~0) c_main_~c~0))) (<= (+ (* 3 .cse13) (* 3 .cse14)) (+ c_main_~b~0 (* .cse5 3) (* 3 .cse6) (* .cse7 3) (* 3 .cse8))) (not (= (+ c_main_~b~0 .cse15 .cse16) (+ (* 2 .cse17) (* .cse18 2) .cse5 .cse10 .cse11 .cse6 .cse15 .cse16 (* .cse19 2) (* .cse20 2)))) (not (= (+ .cse3 .cse4 .cse13 .cse14 (* .cse12 c_main_~y~0)) (+ .cse21 .cse19 .cse2 .cse20 .cse18 .cse13 .cse14 .cse17 .cse22 .cse1))))))) is different from true [2022-03-18 02:53:06,392 WARN L232 SmtUtils]: Spent 12.00s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)