/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_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 22:32:01,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 22:32:01,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 22:32:01,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 22:32:01,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 22:32:01,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 22:32:01,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 22:32:01,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 22:32:01,855 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 22:32:01,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 22:32:01,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 22:32:01,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 22:32:01,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 22:32:01,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 22:32:01,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 22:32:01,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 22:32:01,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 22:32:01,857 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 22:32:01,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 22:32:01,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 22:32:01,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 22:32:01,858 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 22:32:01,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 22:32:01,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:32:01,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 22:32:01,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 22:32:01,858 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 22:32:01,859 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 22:32:01,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 22:32:01,859 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 22:32:01,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 22:32:02,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 22:32:02,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 22:32:02,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 22:32:02,076 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 22:32:02,079 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 22:32:02,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2022-04-06 22:32:02,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36325721a/a52b2c5ae29446068ed29ac81f565015/FLAGc97bcd547 [2022-04-06 22:32:02,495 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 22:32:02,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2022-04-06 22:32:02,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36325721a/a52b2c5ae29446068ed29ac81f565015/FLAGc97bcd547 [2022-04-06 22:32:02,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36325721a/a52b2c5ae29446068ed29ac81f565015 [2022-04-06 22:32:02,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 22:32:02,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 22:32:02,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 22:32:02,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 22:32:02,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 22:32:02,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:32:02" (1/1) ... [2022-04-06 22:32:02,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d653998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:02, skipping insertion in model container [2022-04-06 22:32:02,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:32:02" (1/1) ... [2022-04-06 22:32:02,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 22:32:02,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 22:32:02,668 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_unwindbound5.c[490,503] [2022-04-06 22:32:02,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:32:02,688 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 22:32:02,696 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_unwindbound5.c[490,503] [2022-04-06 22:32:02,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:32:02,711 INFO L208 MainTranslator]: Completed translation [2022-04-06 22:32:02,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:02 WrapperNode [2022-04-06 22:32:02,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 22:32:02,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 22:32:02,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 22:32:02,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 22:32:02,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:02" (1/1) ... [2022-04-06 22:32:02,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:02" (1/1) ... [2022-04-06 22:32:02,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:02" (1/1) ... [2022-04-06 22:32:02,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:02" (1/1) ... [2022-04-06 22:32:02,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:02" (1/1) ... [2022-04-06 22:32:02,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:02" (1/1) ... [2022-04-06 22:32:02,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:02" (1/1) ... [2022-04-06 22:32:02,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 22:32:02,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 22:32:02,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 22:32:02,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 22:32:02,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:02" (1/1) ... [2022-04-06 22:32:02,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:32:02,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:02,783 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) [2022-04-06 22:32:02,807 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 [2022-04-06 22:32:02,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 22:32:02,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 22:32:02,820 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 22:32:02,820 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 22:32:02,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 22:32:02,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 22:32:02,821 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 22:32:02,821 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 22:32:02,821 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 22:32:02,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 22:32:02,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 22:32:02,822 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 22:32:02,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 22:32:02,822 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 22:32:02,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 22:32:02,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 22:32:02,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 22:32:02,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 22:32:02,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 22:32:02,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 22:32:02,885 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 22:32:02,887 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 22:32:03,001 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 22:32:03,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 22:32:03,005 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 22:32:03,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:32:03 BoogieIcfgContainer [2022-04-06 22:32:03,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 22:32:03,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 22:32:03,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 22:32:03,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 22:32:03,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:32:02" (1/3) ... [2022-04-06 22:32:03,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7aa015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:32:03, skipping insertion in model container [2022-04-06 22:32:03,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:02" (2/3) ... [2022-04-06 22:32:03,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7aa015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:32:03, skipping insertion in model container [2022-04-06 22:32:03,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:32:03" (3/3) ... [2022-04-06 22:32:03,013 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.c [2022-04-06 22:32:03,016 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 22:32:03,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 22:32:03,052 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 22:32:03,059 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 [2022-04-06 22:32:03,059 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 22:32:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 22:32:03,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 22:32:03,102 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:03,102 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:03,103 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:03,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2022-04-06 22:32:03,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:03,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [463284525] [2022-04-06 22:32:03,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:03,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 2 times [2022-04-06 22:32:03,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:03,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782923904] [2022-04-06 22:32:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:03,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:03,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 22:32:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:03,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 22:32:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:03,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 22:32:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:03,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 22:32:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:03,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 22:32:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:32:03,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:03,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782923904] [2022-04-06 22:32:03,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782923904] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:03,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:03,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:32:03,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:03,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [463284525] [2022-04-06 22:32:03,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [463284525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:03,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:03,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:32:03,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860457646] [2022-04-06 22:32:03,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:03,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 22:32:03,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 22:32:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:32:03,381 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:32:03,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:03,490 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2022-04-06 22:32:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 22:32:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-06 22:32:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:03,496 INFO L225 Difference]: With dead ends: 72 [2022-04-06 22:32:03,497 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 22:32:03,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:32:03,502 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:03,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 22:32:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 22:32:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 22:32:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-04-06 22:32:03,534 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-04-06 22:32:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:03,534 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-04-06 22:32:03,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:32:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-04-06 22:32:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 22:32:03,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:03,535 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:03,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 22:32:03,536 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2022-04-06 22:32:03,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:03,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [450289523] [2022-04-06 22:32:03,537 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 2 times [2022-04-06 22:32:03,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:03,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863514952] [2022-04-06 22:32:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:03,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:03,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:03,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905435871] [2022-04-06 22:32:03,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:03,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:03,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:03,550 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) [2022-04-06 22:32:03,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 22:32:03,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 22:32:03,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:03,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 22:32:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:32:03,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:32:03,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:03,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863514952] [2022-04-06 22:32:03,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:03,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905435871] [2022-04-06 22:32:03,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905435871] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:03,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:03,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 22:32:03,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:03,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [450289523] [2022-04-06 22:32:03,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [450289523] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:03,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:03,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 22:32:03,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032209835] [2022-04-06 22:32:03,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:03,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 22:32:03,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:03,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 22:32:03,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 22:32:03,675 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:32:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:03,687 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-04-06 22:32:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 22:32:03,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 22:32:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:03,688 INFO L225 Difference]: With dead ends: 44 [2022-04-06 22:32:03,688 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 22:32:03,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 22:32:03,689 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:03,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 22:32:03,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 22:32:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 22:32:03,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-04-06 22:32:03,696 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-04-06 22:32:03,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:03,697 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-04-06 22:32:03,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:32:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-04-06 22:32:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 22:32:03,698 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:03,698 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:03,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 22:32:03,905 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 [2022-04-06 22:32:03,905 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:03,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2022-04-06 22:32:03,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:03,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [823241658] [2022-04-06 22:32:03,906 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:03,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 2 times [2022-04-06 22:32:03,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:03,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328051374] [2022-04-06 22:32:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:03,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:03,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:03,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18942437] [2022-04-06 22:32:03,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:03,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:03,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:03,928 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) [2022-04-06 22:32:03,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 22:32:03,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:03,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:03,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:32:03,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 22:32:04,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 22:32:04,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328051374] [2022-04-06 22:32:04,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18942437] [2022-04-06 22:32:04,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18942437] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:04,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:04,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 22:32:04,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:04,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [823241658] [2022-04-06 22:32:04,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [823241658] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:04,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:04,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:32:04,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912745569] [2022-04-06 22:32:04,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:04,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:32:04,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:04,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:32:04,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:32:04,148 INFO L87 Difference]: Start difference. First operand 36 states and 47 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:32:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:04,233 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-04-06 22:32:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:32:04,233 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 22:32:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:04,237 INFO L225 Difference]: With dead ends: 53 [2022-04-06 22:32:04,237 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 22:32:04,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:04,239 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:04,240 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 135 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:04,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 22:32:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-04-06 22:32:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 22:32:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-04-06 22:32:04,259 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-04-06 22:32:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:04,259 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-04-06 22:32:04,259 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:32:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-04-06 22:32:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 22:32:04,260 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:04,260 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:04,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:04,476 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 [2022-04-06 22:32:04,477 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2022-04-06 22:32:04,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:04,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1562059470] [2022-04-06 22:32:04,478 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 2 times [2022-04-06 22:32:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:04,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103084152] [2022-04-06 22:32:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:04,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:04,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:04,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320935644] [2022-04-06 22:32:04,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:04,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:04,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:04,488 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) [2022-04-06 22:32:04,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 22:32:04,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 22:32:04,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:04,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 22:32:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:32:04,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:32:04,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:04,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103084152] [2022-04-06 22:32:04,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:04,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320935644] [2022-04-06 22:32:04,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320935644] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:04,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:04,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:04,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:04,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1562059470] [2022-04-06 22:32:04,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1562059470] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:04,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:04,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:04,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944588244] [2022-04-06 22:32:04,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:04,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:04,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:04,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:04,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:32:04,604 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 22:32:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:04,638 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-04-06 22:32:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:32:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2022-04-06 22:32:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:04,639 INFO L225 Difference]: With dead ends: 51 [2022-04-06 22:32:04,639 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 22:32:04,640 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:32:04,640 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:04,640 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 150 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 22:32:04,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-04-06 22:32:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 22:32:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-04-06 22:32:04,646 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2022-04-06 22:32:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:04,647 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-04-06 22:32:04,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 22:32:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-04-06 22:32:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 22:32:04,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:04,647 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:04,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:04,861 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 [2022-04-06 22:32:04,861 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2022-04-06 22:32:04,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:04,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2106608161] [2022-04-06 22:32:04,862 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 2 times [2022-04-06 22:32:04,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:04,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424405285] [2022-04-06 22:32:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:04,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:04,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:04,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611311285] [2022-04-06 22:32:04,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:04,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:04,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:04,875 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) [2022-04-06 22:32:04,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 22:32:04,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:04,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:04,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:32:04,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:32:04,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:32:04,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:04,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424405285] [2022-04-06 22:32:04,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:04,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611311285] [2022-04-06 22:32:04,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611311285] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:04,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:04,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:04,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:04,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2106608161] [2022-04-06 22:32:04,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2106608161] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:04,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:04,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:04,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189834928] [2022-04-06 22:32:04,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:04,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:04,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:04,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:04,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:32:04,989 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:32:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:05,012 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2022-04-06 22:32:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:32:05,013 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), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-06 22:32:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:05,014 INFO L225 Difference]: With dead ends: 72 [2022-04-06 22:32:05,015 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 22:32:05,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:32:05,015 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:05,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 22:32:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 22:32:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 22:32:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-04-06 22:32:05,021 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 39 [2022-04-06 22:32:05,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:05,022 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-04-06 22:32:05,022 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), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:32:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-04-06 22:32:05,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 22:32:05,022 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:05,023 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:05,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:05,239 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 [2022-04-06 22:32:05,239 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:05,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:05,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2022-04-06 22:32:05,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:05,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1244388598] [2022-04-06 22:32:05,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:05,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 2 times [2022-04-06 22:32:05,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:05,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715016746] [2022-04-06 22:32:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:05,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:05,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:05,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289215123] [2022-04-06 22:32:05,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:05,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:05,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:05,248 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) [2022-04-06 22:32:05,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 22:32:05,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:05,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:05,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 22:32:05,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 22:32:05,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:32:05,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:05,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715016746] [2022-04-06 22:32:05,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:05,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289215123] [2022-04-06 22:32:05,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289215123] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:05,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:05,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 22:32:05,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:05,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1244388598] [2022-04-06 22:32:05,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1244388598] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:05,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:05,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:05,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851680875] [2022-04-06 22:32:05,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:05,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:05,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:05,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:05,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:05,534 INFO L87 Difference]: Start difference. First operand 46 states and 58 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 22:32:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:05,576 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2022-04-06 22:32:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:32:05,591 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-04-06 22:32:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:05,592 INFO L225 Difference]: With dead ends: 61 [2022-04-06 22:32:05,592 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 22:32:05,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:32:05,593 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:05,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:05,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 22:32:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 22:32:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 22:32:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-04-06 22:32:05,600 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 41 [2022-04-06 22:32:05,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:05,600 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-04-06 22:32:05,601 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 22:32:05,601 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-04-06 22:32:05,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 22:32:05,601 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:05,601 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:05,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:05,818 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 [2022-04-06 22:32:05,818 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:05,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:05,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2022-04-06 22:32:05,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:05,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089716802] [2022-04-06 22:32:05,819 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:05,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 2 times [2022-04-06 22:32:05,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:05,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540788099] [2022-04-06 22:32:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:05,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:05,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:05,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289218433] [2022-04-06 22:32:05,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:05,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:05,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:05,827 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) [2022-04-06 22:32:05,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 22:32:05,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:05,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:05,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 22:32:05,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 22:32:06,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 22:32:06,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:06,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540788099] [2022-04-06 22:32:06,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:06,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289218433] [2022-04-06 22:32:06,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289218433] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:06,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:06,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 22:32:06,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:06,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089716802] [2022-04-06 22:32:06,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089716802] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:06,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:06,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:06,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547339940] [2022-04-06 22:32:06,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:06,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:06,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:06,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:06,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:06,140 INFO L87 Difference]: Start difference. First operand 58 states and 76 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 22:32:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:06,202 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-04-06 22:32:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:32:06,202 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-04-06 22:32:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:06,203 INFO L225 Difference]: With dead ends: 65 [2022-04-06 22:32:06,203 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 22:32:06,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:32:06,204 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:06,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 148 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 22:32:06,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-06 22:32:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 40 states have internal predecessors, (45), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 22:32:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-04-06 22:32:06,214 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 46 [2022-04-06 22:32:06,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:06,214 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-04-06 22:32:06,214 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 22:32:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-04-06 22:32:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 22:32:06,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:06,215 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:06,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:06,429 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 [2022-04-06 22:32:06,430 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:06,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:06,430 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2022-04-06 22:32:06,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:06,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2040519888] [2022-04-06 22:32:06,430 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:06,430 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 2 times [2022-04-06 22:32:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:06,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607900228] [2022-04-06 22:32:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:06,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:06,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:06,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917209492] [2022-04-06 22:32:06,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:06,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:06,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:06,439 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) [2022-04-06 22:32:06,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 22:32:06,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:06,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:06,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 22:32:06,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 22:32:06,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:06,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:06,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607900228] [2022-04-06 22:32:06,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:06,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917209492] [2022-04-06 22:32:06,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917209492] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:06,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:06,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 22:32:06,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:06,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2040519888] [2022-04-06 22:32:06,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2040519888] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:06,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:06,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:32:06,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403008561] [2022-04-06 22:32:06,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:06,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:32:06,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:06,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:32:06,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:06,717 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 22:32:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:06,801 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2022-04-06 22:32:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:32:06,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-04-06 22:32:06,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:06,802 INFO L225 Difference]: With dead ends: 69 [2022-04-06 22:32:06,802 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 22:32:06,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:32:06,803 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:06,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 160 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 22:32:06,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-04-06 22:32:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.2) internal successors, (48), 43 states have internal predecessors, (48), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 22:32:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-04-06 22:32:06,811 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 51 [2022-04-06 22:32:06,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:06,811 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-04-06 22:32:06,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 22:32:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-04-06 22:32:06,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 22:32:06,812 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:06,812 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-04-06 22:32:06,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:07,028 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 [2022-04-06 22:32:07,029 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2022-04-06 22:32:07,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:07,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [411831401] [2022-04-06 22:32:07,029 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:07,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 2 times [2022-04-06 22:32:07,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:07,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566899807] [2022-04-06 22:32:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:07,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:07,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:07,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126124512] [2022-04-06 22:32:07,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:07,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:07,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:07,038 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) [2022-04-06 22:32:07,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 22:32:07,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:07,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:07,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:32:07,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:07,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:07,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:07,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566899807] [2022-04-06 22:32:07,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:07,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126124512] [2022-04-06 22:32:07,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126124512] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:07,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:07,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 22:32:07,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [411831401] [2022-04-06 22:32:07,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [411831401] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:07,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:07,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:32:07,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712356011] [2022-04-06 22:32:07,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:07,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:32:07,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:07,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:32:07,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:32:07,259 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 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) [2022-04-06 22:32:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:07,333 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2022-04-06 22:32:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:32:07,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 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 59 [2022-04-06 22:32:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:07,335 INFO L225 Difference]: With dead ends: 96 [2022-04-06 22:32:07,335 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 22:32:07,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:32:07,336 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:07,336 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 208 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 22:32:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2022-04-06 22:32:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 22:32:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2022-04-06 22:32:07,348 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2022-04-06 22:32:07,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:07,349 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2022-04-06 22:32:07,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 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) [2022-04-06 22:32:07,350 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2022-04-06 22:32:07,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 22:32:07,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:07,351 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:07,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:07,563 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 [2022-04-06 22:32:07,564 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:07,564 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2022-04-06 22:32:07,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:07,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1252647142] [2022-04-06 22:32:07,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 2 times [2022-04-06 22:32:07,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:07,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925789568] [2022-04-06 22:32:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:07,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:07,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:07,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149849021] [2022-04-06 22:32:07,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:07,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:07,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:07,573 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) [2022-04-06 22:32:07,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 22:32:07,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:07,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:07,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:32:07,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:07,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:07,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:07,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925789568] [2022-04-06 22:32:07,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:07,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149849021] [2022-04-06 22:32:07,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149849021] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:07,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:07,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 22:32:07,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:07,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1252647142] [2022-04-06 22:32:07,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1252647142] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:07,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:07,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:32:07,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595442141] [2022-04-06 22:32:07,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:07,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:32:07,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:32:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:07,830 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:07,872 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2022-04-06 22:32:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:32:07,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2022-04-06 22:32:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:07,874 INFO L225 Difference]: With dead ends: 111 [2022-04-06 22:32:07,874 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 22:32:07,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:32:07,875 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:07,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 22:32:07,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 22:32:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 26 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 22:32:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-04-06 22:32:07,897 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 60 [2022-04-06 22:32:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:07,897 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-04-06 22:32:07,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-04-06 22:32:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 22:32:07,900 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:07,900 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:07,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:08,115 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 [2022-04-06 22:32:08,115 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2022-04-06 22:32:08,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:08,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [483004260] [2022-04-06 22:32:08,116 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 2 times [2022-04-06 22:32:08,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:08,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490194385] [2022-04-06 22:32:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:08,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:08,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:08,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602315619] [2022-04-06 22:32:08,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:08,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:08,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:08,123 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) [2022-04-06 22:32:08,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 22:32:08,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:08,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:08,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:32:08,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 22:32:08,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 22:32:08,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490194385] [2022-04-06 22:32:08,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602315619] [2022-04-06 22:32:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602315619] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:08,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:08,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 22:32:08,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [483004260] [2022-04-06 22:32:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [483004260] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:08,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:08,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:32:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097366114] [2022-04-06 22:32:08,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:08,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:32:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:32:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:08,351 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 22:32:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:08,518 INFO L93 Difference]: Finished difference Result 182 states and 256 transitions. [2022-04-06 22:32:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:32:08,518 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-04-06 22:32:08,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:08,519 INFO L225 Difference]: With dead ends: 182 [2022-04-06 22:32:08,519 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 22:32:08,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:32:08,520 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 61 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:08,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 317 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 22:32:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146. [2022-04-06 22:32:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 94 states have internal predecessors, (115), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 22:32:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions. [2022-04-06 22:32:08,534 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 61 [2022-04-06 22:32:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:08,534 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions. [2022-04-06 22:32:08,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 22:32:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions. [2022-04-06 22:32:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 22:32:08,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:08,535 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:08,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 22:32:08,751 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 [2022-04-06 22:32:08,751 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2022-04-06 22:32:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:08,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1891303216] [2022-04-06 22:32:08,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 2 times [2022-04-06 22:32:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:08,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001032816] [2022-04-06 22:32:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:08,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:08,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:08,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348505073] [2022-04-06 22:32:08,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:08,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:08,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:08,759 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) [2022-04-06 22:32:08,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 22:32:08,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:08,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:32:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:08,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:09,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:09,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001032816] [2022-04-06 22:32:09,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:09,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348505073] [2022-04-06 22:32:09,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348505073] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:09,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:09,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 22:32:09,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:09,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1891303216] [2022-04-06 22:32:09,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1891303216] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:09,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:09,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:32:09,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234980392] [2022-04-06 22:32:09,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:09,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:32:09,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:32:09,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:09,019 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:09,074 INFO L93 Difference]: Finished difference Result 183 states and 250 transitions. [2022-04-06 22:32:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:32:09,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-04-06 22:32:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:09,075 INFO L225 Difference]: With dead ends: 183 [2022-04-06 22:32:09,076 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 22:32:09,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:32:09,076 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 16 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:09,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 130 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 22:32:09,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-04-06 22:32:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 94 states have internal predecessors, (114), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 22:32:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2022-04-06 22:32:09,089 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 62 [2022-04-06 22:32:09,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:09,089 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2022-04-06 22:32:09,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:09,089 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2022-04-06 22:32:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 22:32:09,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:09,090 INFO L499 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:09,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:09,303 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 [2022-04-06 22:32:09,303 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2022-04-06 22:32:09,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:09,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [667975996] [2022-04-06 22:32:09,304 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 2 times [2022-04-06 22:32:09,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:09,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505180776] [2022-04-06 22:32:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:09,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:09,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:09,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236628196] [2022-04-06 22:32:09,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:09,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:09,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:09,311 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) [2022-04-06 22:32:09,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 22:32:09,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:09,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:09,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:32:09,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:09,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:09,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:09,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505180776] [2022-04-06 22:32:09,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:09,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236628196] [2022-04-06 22:32:09,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236628196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:09,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:09,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-04-06 22:32:09,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:09,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [667975996] [2022-04-06 22:32:09,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [667975996] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:09,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:09,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:32:09,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230215829] [2022-04-06 22:32:09,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:09,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:32:09,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:09,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:32:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:09,552 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:09,639 INFO L93 Difference]: Finished difference Result 253 states and 351 transitions. [2022-04-06 22:32:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:32:09,640 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-04-06 22:32:09,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:09,641 INFO L225 Difference]: With dead ends: 253 [2022-04-06 22:32:09,641 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 22:32:09,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:32:09,642 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 41 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:09,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 159 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:09,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 22:32:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-04-06 22:32:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 111 states have internal predecessors, (133), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 22:32:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2022-04-06 22:32:09,656 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 66 [2022-04-06 22:32:09,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:09,657 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2022-04-06 22:32:09,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2022-04-06 22:32:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 22:32:09,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:09,657 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2022-04-06 22:32:09,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:09,870 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 [2022-04-06 22:32:09,871 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:09,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:09,871 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2022-04-06 22:32:09,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:09,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [875025986] [2022-04-06 22:32:09,871 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:09,871 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 2 times [2022-04-06 22:32:09,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:09,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114486344] [2022-04-06 22:32:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:09,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:09,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:09,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815310609] [2022-04-06 22:32:09,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:09,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:09,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:09,878 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) [2022-04-06 22:32:09,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 22:32:09,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:09,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 22:32:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 22:32:10,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 22:32:10,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114486344] [2022-04-06 22:32:10,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815310609] [2022-04-06 22:32:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815310609] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:10,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:10,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-06 22:32:10,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [875025986] [2022-04-06 22:32:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [875025986] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:10,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:10,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:32:10,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802056362] [2022-04-06 22:32:10,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:10,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:32:10,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:32:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-04-06 22:32:10,257 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 22:32:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:10,456 INFO L93 Difference]: Finished difference Result 195 states and 259 transitions. [2022-04-06 22:32:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:32:10,457 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2022-04-06 22:32:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:10,458 INFO L225 Difference]: With dead ends: 195 [2022-04-06 22:32:10,458 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 22:32:10,458 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:32:10,458 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 22 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:10,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 295 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 22:32:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2022-04-06 22:32:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 121 states have internal predecessors, (146), 55 states have call successors, (55), 18 states have call predecessors, (55), 17 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 22:32:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions. [2022-04-06 22:32:10,474 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 68 [2022-04-06 22:32:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:10,474 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions. [2022-04-06 22:32:10,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 22:32:10,474 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions. [2022-04-06 22:32:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 22:32:10,475 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:10,475 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:10,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:10,689 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 [2022-04-06 22:32:10,689 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 3 times [2022-04-06 22:32:10,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:10,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1946301044] [2022-04-06 22:32:10,690 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:10,690 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 4 times [2022-04-06 22:32:10,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:10,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193289709] [2022-04-06 22:32:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:10,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:10,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:10,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824285726] [2022-04-06 22:32:10,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:10,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:10,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:10,697 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) [2022-04-06 22:32:10,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 22:32:10,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:10,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:10,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 22:32:10,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 22:32:11,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 22:32:11,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193289709] [2022-04-06 22:32:11,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824285726] [2022-04-06 22:32:11,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824285726] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:11,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:11,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 22:32:11,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1946301044] [2022-04-06 22:32:11,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1946301044] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:11,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:11,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:32:11,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606602832] [2022-04-06 22:32:11,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:11,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:32:11,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:11,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:32:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:32:11,169 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 22:32:11,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:11,290 INFO L93 Difference]: Finished difference Result 199 states and 262 transitions. [2022-04-06 22:32:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:32:11,290 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), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 73 [2022-04-06 22:32:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:11,291 INFO L225 Difference]: With dead ends: 199 [2022-04-06 22:32:11,291 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 22:32:11,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:32:11,292 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 17 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:11,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 234 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:11,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 22:32:11,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-04-06 22:32:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 124 states have internal predecessors, (149), 55 states have call successors, (55), 19 states have call predecessors, (55), 18 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 22:32:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 257 transitions. [2022-04-06 22:32:11,317 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 257 transitions. Word has length 73 [2022-04-06 22:32:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:11,317 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 257 transitions. [2022-04-06 22:32:11,317 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), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 22:32:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 257 transitions. [2022-04-06 22:32:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 22:32:11,318 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:11,318 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:11,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:11,527 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 [2022-04-06 22:32:11,527 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:11,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 5 times [2022-04-06 22:32:11,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:11,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [708629911] [2022-04-06 22:32:11,528 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:11,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 6 times [2022-04-06 22:32:11,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:11,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49440020] [2022-04-06 22:32:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:11,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:11,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:11,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769123031] [2022-04-06 22:32:11,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:32:11,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:11,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:11,536 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) [2022-04-06 22:32:11,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 22:32:11,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:32:11,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:11,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 22:32:11,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 22:32:12,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:12,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49440020] [2022-04-06 22:32:12,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769123031] [2022-04-06 22:32:12,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769123031] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:12,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:12,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 22:32:12,301 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [708629911] [2022-04-06 22:32:12,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [708629911] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:12,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:12,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:32:12,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552279176] [2022-04-06 22:32:12,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:12,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:32:12,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:32:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:32:12,302 INFO L87 Difference]: Start difference. First operand 194 states and 257 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 22:32:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:13,388 INFO L93 Difference]: Finished difference Result 203 states and 265 transitions. [2022-04-06 22:32:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:32:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2022-04-06 22:32:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:13,391 INFO L225 Difference]: With dead ends: 203 [2022-04-06 22:32:13,391 INFO L226 Difference]: Without dead ends: 201 [2022-04-06 22:32:13,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:32:13,393 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 52 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:13,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 260 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:32:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-04-06 22:32:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2022-04-06 22:32:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 123 states have (on average 1.2357723577235773) internal successors, (152), 127 states have internal predecessors, (152), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 22:32:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2022-04-06 22:32:13,437 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 78 [2022-04-06 22:32:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:13,437 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2022-04-06 22:32:13,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 22:32:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2022-04-06 22:32:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 22:32:13,438 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:13,438 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 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] [2022-04-06 22:32:13,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:13,654 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 [2022-04-06 22:32:13,655 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:13,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 3 times [2022-04-06 22:32:13,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:13,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [126063423] [2022-04-06 22:32:13,655 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:13,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 4 times [2022-04-06 22:32:13,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:13,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650494842] [2022-04-06 22:32:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:13,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:13,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:13,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775419307] [2022-04-06 22:32:13,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:13,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:13,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:13,667 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) [2022-04-06 22:32:13,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 22:32:13,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:13,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 22:32:13,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 22:32:14,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 22:32:14,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650494842] [2022-04-06 22:32:14,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775419307] [2022-04-06 22:32:14,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775419307] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:14,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:14,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 16 [2022-04-06 22:32:14,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [126063423] [2022-04-06 22:32:14,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [126063423] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:14,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:14,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:32:14,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131474317] [2022-04-06 22:32:14,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:14,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:32:14,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:14,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:32:14,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:32:14,445 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:32:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:15,172 INFO L93 Difference]: Finished difference Result 212 states and 278 transitions. [2022-04-06 22:32:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:32:15,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-04-06 22:32:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:15,174 INFO L225 Difference]: With dead ends: 212 [2022-04-06 22:32:15,174 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 22:32:15,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:32:15,175 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 50 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:15,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 278 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:32:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 22:32:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2022-04-06 22:32:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 131 states have internal predecessors, (155), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 22:32:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions. [2022-04-06 22:32:15,214 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 82 [2022-04-06 22:32:15,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:15,214 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions. [2022-04-06 22:32:15,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:32:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions. [2022-04-06 22:32:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 22:32:15,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:15,215 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:15,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:15,421 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 [2022-04-06 22:32:15,421 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2022-04-06 22:32:15,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:15,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [865589914] [2022-04-06 22:32:15,422 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 2 times [2022-04-06 22:32:15,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:15,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683683563] [2022-04-06 22:32:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:15,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:15,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:15,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601518777] [2022-04-06 22:32:15,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:15,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:15,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:15,429 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) [2022-04-06 22:32:15,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 22:32:15,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:15,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:32:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 22:32:15,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:32:15,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:15,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683683563] [2022-04-06 22:32:15,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:15,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601518777] [2022-04-06 22:32:15,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601518777] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:15,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:15,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-04-06 22:32:15,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:15,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [865589914] [2022-04-06 22:32:15,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [865589914] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:15,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:15,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:32:15,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562394860] [2022-04-06 22:32:15,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:15,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:32:15,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:15,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:32:15,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:15,696 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:15,763 INFO L93 Difference]: Finished difference Result 214 states and 277 transitions. [2022-04-06 22:32:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:32:15,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2022-04-06 22:32:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:15,774 INFO L225 Difference]: With dead ends: 214 [2022-04-06 22:32:15,774 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 22:32:15,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:32:15,774 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:15,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 22:32:15,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-04-06 22:32:15,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 134 states have internal predecessors, (158), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 22:32:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 268 transitions. [2022-04-06 22:32:15,797 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 268 transitions. Word has length 83 [2022-04-06 22:32:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:15,798 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 268 transitions. [2022-04-06 22:32:15,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 268 transitions. [2022-04-06 22:32:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 22:32:15,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:15,800 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:15,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:16,015 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 [2022-04-06 22:32:16,016 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2022-04-06 22:32:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:16,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [546435132] [2022-04-06 22:32:16,016 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 2 times [2022-04-06 22:32:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:16,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050497156] [2022-04-06 22:32:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:16,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:16,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:16,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936214676] [2022-04-06 22:32:16,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:16,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:16,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:16,022 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) [2022-04-06 22:32:16,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 22:32:16,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:16,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:16,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 22:32:16,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:32:16,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:32:16,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:16,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050497156] [2022-04-06 22:32:16,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:16,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936214676] [2022-04-06 22:32:16,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936214676] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:16,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:16,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 22:32:16,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [546435132] [2022-04-06 22:32:16,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [546435132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:16,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:16,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:32:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916957462] [2022-04-06 22:32:16,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:16,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:32:16,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:16,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:32:16,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:32:16,748 INFO L87 Difference]: Start difference. First operand 206 states and 268 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:17,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:17,014 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2022-04-06 22:32:17,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:32:17,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2022-04-06 22:32:17,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:17,015 INFO L225 Difference]: With dead ends: 234 [2022-04-06 22:32:17,015 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 22:32:17,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:32:17,025 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 25 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:17,025 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 307 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:32:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 22:32:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2022-04-06 22:32:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 141 states have (on average 1.24822695035461) internal successors, (176), 148 states have internal predecessors, (176), 66 states have call successors, (66), 22 states have call predecessors, (66), 21 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-06 22:32:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 306 transitions. [2022-04-06 22:32:17,044 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 306 transitions. Word has length 84 [2022-04-06 22:32:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:17,044 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 306 transitions. [2022-04-06 22:32:17,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 306 transitions. [2022-04-06 22:32:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 22:32:17,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:17,045 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:17,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:17,249 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 [2022-04-06 22:32:17,250 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:17,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:17,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 3 times [2022-04-06 22:32:17,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:17,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1777338022] [2022-04-06 22:32:17,250 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:17,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 4 times [2022-04-06 22:32:17,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:17,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556016982] [2022-04-06 22:32:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:17,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:17,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:17,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908814117] [2022-04-06 22:32:17,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:17,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:17,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:17,264 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) [2022-04-06 22:32:17,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 22:32:17,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:17,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:17,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 22:32:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:32:17,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:32:17,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:17,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556016982] [2022-04-06 22:32:17,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:17,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908814117] [2022-04-06 22:32:17,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908814117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:17,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:17,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:17,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:17,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1777338022] [2022-04-06 22:32:17,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1777338022] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:17,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:17,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:17,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828099052] [2022-04-06 22:32:17,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:17,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:17,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:17,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:17,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:32:17,406 INFO L87 Difference]: Start difference. First operand 229 states and 306 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 22:32:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:17,499 INFO L93 Difference]: Finished difference Result 371 states and 532 transitions. [2022-04-06 22:32:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:32:17,499 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2022-04-06 22:32:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:17,501 INFO L225 Difference]: With dead ends: 371 [2022-04-06 22:32:17,501 INFO L226 Difference]: Without dead ends: 291 [2022-04-06 22:32:17,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:32:17,504 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:17,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 172 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-04-06 22:32:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257. [2022-04-06 22:32:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 161 states have (on average 1.2546583850931676) internal successors, (202), 168 states have internal predecessors, (202), 74 states have call successors, (74), 22 states have call predecessors, (74), 21 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-04-06 22:32:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 348 transitions. [2022-04-06 22:32:17,534 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 348 transitions. Word has length 87 [2022-04-06 22:32:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:17,534 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 348 transitions. [2022-04-06 22:32:17,534 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 22:32:17,535 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 348 transitions. [2022-04-06 22:32:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 22:32:17,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:17,535 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:17,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:17,736 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 [2022-04-06 22:32:17,736 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:17,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:17,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 1 times [2022-04-06 22:32:17,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:17,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045379334] [2022-04-06 22:32:17,737 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:17,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 2 times [2022-04-06 22:32:17,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:17,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276146622] [2022-04-06 22:32:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:17,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:17,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:17,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354499752] [2022-04-06 22:32:17,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:17,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:17,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:17,743 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) [2022-04-06 22:32:17,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 22:32:17,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:17,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:17,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 22:32:17,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-04-06 22:32:17,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-04-06 22:32:18,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:18,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276146622] [2022-04-06 22:32:18,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:18,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354499752] [2022-04-06 22:32:18,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354499752] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:18,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:18,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 22:32:18,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:18,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045379334] [2022-04-06 22:32:18,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045379334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:18,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:18,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:32:18,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120352151] [2022-04-06 22:32:18,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:18,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:32:18,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:18,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:32:18,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:32:18,152 INFO L87 Difference]: Start difference. First operand 257 states and 348 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 22:32:18,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:18,296 INFO L93 Difference]: Finished difference Result 301 states and 415 transitions. [2022-04-06 22:32:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:32:18,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2022-04-06 22:32:18,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:18,305 INFO L225 Difference]: With dead ends: 301 [2022-04-06 22:32:18,305 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 22:32:18,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:32:18,305 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:18,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 237 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 22:32:18,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2022-04-06 22:32:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 183 states have (on average 1.273224043715847) internal successors, (233), 191 states have internal predecessors, (233), 87 states have call successors, (87), 23 states have call predecessors, (87), 22 states have return successors, (84), 78 states have call predecessors, (84), 84 states have call successors, (84) [2022-04-06 22:32:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 404 transitions. [2022-04-06 22:32:18,331 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 404 transitions. Word has length 89 [2022-04-06 22:32:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:18,331 INFO L478 AbstractCegarLoop]: Abstraction has 293 states and 404 transitions. [2022-04-06 22:32:18,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 22:32:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 404 transitions. [2022-04-06 22:32:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 22:32:18,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:18,332 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:18,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:18,543 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 [2022-04-06 22:32:18,543 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2022-04-06 22:32:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:18,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567596907] [2022-04-06 22:32:18,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 2 times [2022-04-06 22:32:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:18,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657689215] [2022-04-06 22:32:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:18,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:18,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:18,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853956376] [2022-04-06 22:32:18,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:18,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:18,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:18,551 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) [2022-04-06 22:32:18,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 22:32:18,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:18,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:18,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 22:32:18,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 22:32:18,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:32:18,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657689215] [2022-04-06 22:32:18,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:18,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853956376] [2022-04-06 22:32:18,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853956376] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:18,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:18,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 22:32:18,855 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:18,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1567596907] [2022-04-06 22:32:18,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1567596907] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:18,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:18,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:32:18,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423714425] [2022-04-06 22:32:18,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:18,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:32:18,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:18,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:32:18,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:32:18,856 INFO L87 Difference]: Start difference. First operand 293 states and 404 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:18,960 INFO L93 Difference]: Finished difference Result 463 states and 647 transitions. [2022-04-06 22:32:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:32:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2022-04-06 22:32:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:18,962 INFO L225 Difference]: With dead ends: 463 [2022-04-06 22:32:18,962 INFO L226 Difference]: Without dead ends: 329 [2022-04-06 22:32:18,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:32:18,963 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 44 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:18,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 169 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-04-06 22:32:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2022-04-06 22:32:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 207 states have (on average 1.2367149758454106) internal successors, (256), 214 states have internal predecessors, (256), 90 states have call successors, (90), 30 states have call predecessors, (90), 29 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 22:32:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 433 transitions. [2022-04-06 22:32:18,990 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 433 transitions. Word has length 89 [2022-04-06 22:32:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:18,990 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 433 transitions. [2022-04-06 22:32:18,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 433 transitions. [2022-04-06 22:32:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 22:32:18,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:18,991 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:19,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:19,193 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 [2022-04-06 22:32:19,194 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:19,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2022-04-06 22:32:19,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:19,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [337379808] [2022-04-06 22:32:19,194 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:19,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 2 times [2022-04-06 22:32:19,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:19,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325014687] [2022-04-06 22:32:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:19,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:19,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:19,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161794060] [2022-04-06 22:32:19,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:19,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:19,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:19,201 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) [2022-04-06 22:32:19,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 22:32:19,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:19,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:19,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 22:32:19,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 22:32:22,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:22,978 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:32:25,029 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_main_~x~0 0)) (.cse3 (+ (* c_main_~q~0 c_main_~x~0 c_main_~k~0) c_main_~c~0 (* (- 1) c_main_~r~0 c_main_~y~0) (* c_main_~s~0 c_main_~y~0 c_main_~k~0)))) (and (or .cse0 (let ((.cse2 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0)))) (.cse1 (+ (div .cse3 c_main_~x~0) (* (- 1) c_main_~q~0 c_main_~k~0)))) (= (+ (* .cse1 c_main_~x~0) (* .cse2 c_main_~y~0) (* c_main_~c~0 c_main_~y~0)) (+ c_main_~c~0 (* c_main_~yy~0 .cse2) (* c_main_~xy~0 .cse1)))) (not (= (mod .cse3 c_main_~x~0) 0))) (or (forall ((main_~p~0 Int)) (let ((.cse5 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0)))) (.cse4 (+ main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0)))) (= (+ c_main_~c~0 (* c_main_~xy~0 .cse4) (* c_main_~yy~0 .cse5)) (+ (* .cse5 c_main_~y~0) (* .cse4 c_main_~x~0) (* c_main_~c~0 c_main_~y~0))))) (not .cse0) (not (= .cse3 0))))) is different from true [2022-04-06 22:32:35,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:35,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325014687] [2022-04-06 22:32:35,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:35,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161794060] [2022-04-06 22:32:35,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161794060] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:35,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:35,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 22:32:35,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:35,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [337379808] [2022-04-06 22:32:35,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [337379808] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:35,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:35,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:32:35,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643423218] [2022-04-06 22:32:35,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:35,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:32:35,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:32:35,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=339, Unknown=1, NotChecked=38, Total=462 [2022-04-06 22:32:35,081 INFO L87 Difference]: Start difference. First operand 327 states and 433 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:32:37,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:37,316 INFO L93 Difference]: Finished difference Result 339 states and 443 transitions. [2022-04-06 22:32:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:32:37,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2022-04-06 22:32:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:37,318 INFO L225 Difference]: With dead ends: 339 [2022-04-06 22:32:37,318 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 22:32:37,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=112, Invalid=491, Unknown=1, NotChecked=46, Total=650 [2022-04-06 22:32:37,318 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 58 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:37,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 282 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 22:32:37,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 22:32:37,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2022-04-06 22:32:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 213 states have (on average 1.2300469483568075) internal successors, (262), 220 states have internal predecessors, (262), 90 states have call successors, (90), 32 states have call predecessors, (90), 31 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 22:32:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 439 transitions. [2022-04-06 22:32:37,371 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 439 transitions. Word has length 101 [2022-04-06 22:32:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:37,371 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 439 transitions. [2022-04-06 22:32:37,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:32:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 439 transitions. [2022-04-06 22:32:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 22:32:37,372 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:37,372 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:37,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:37,587 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 [2022-04-06 22:32:37,587 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 5 times [2022-04-06 22:32:37,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:37,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [338802314] [2022-04-06 22:32:37,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 6 times [2022-04-06 22:32:37,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:37,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234389020] [2022-04-06 22:32:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:37,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:37,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:37,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619294103] [2022-04-06 22:32:37,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:32:37,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:37,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:37,599 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) [2022-04-06 22:32:37,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 22:32:37,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 22:32:37,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:37,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 22:32:37,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 22:32:37,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 22:32:37,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:37,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234389020] [2022-04-06 22:32:37,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:37,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619294103] [2022-04-06 22:32:37,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619294103] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:37,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:37,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-04-06 22:32:37,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:37,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [338802314] [2022-04-06 22:32:37,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [338802314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:37,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:37,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:32:37,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150348710] [2022-04-06 22:32:37,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:37,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:32:37,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:37,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:32:37,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:32:37,909 INFO L87 Difference]: Start difference. First operand 335 states and 439 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 22:32:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:37,976 INFO L93 Difference]: Finished difference Result 341 states and 444 transitions. [2022-04-06 22:32:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:32:37,979 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2022-04-06 22:32:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:37,981 INFO L225 Difference]: With dead ends: 341 [2022-04-06 22:32:37,981 INFO L226 Difference]: Without dead ends: 339 [2022-04-06 22:32:37,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:32:37,981 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:37,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 140 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-04-06 22:32:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2022-04-06 22:32:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 216 states have (on average 1.2268518518518519) internal successors, (265), 223 states have internal predecessors, (265), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 22:32:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 442 transitions. [2022-04-06 22:32:38,011 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 442 transitions. Word has length 105 [2022-04-06 22:32:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:38,011 INFO L478 AbstractCegarLoop]: Abstraction has 339 states and 442 transitions. [2022-04-06 22:32:38,011 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 22:32:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 442 transitions. [2022-04-06 22:32:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 22:32:38,012 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:38,012 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 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] [2022-04-06 22:32:38,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 22:32:38,227 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 [2022-04-06 22:32:38,227 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 3 times [2022-04-06 22:32:38,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:38,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369550172] [2022-04-06 22:32:38,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 4 times [2022-04-06 22:32:38,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:38,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625770036] [2022-04-06 22:32:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:38,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:38,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:38,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240752700] [2022-04-06 22:32:38,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:38,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:38,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:38,234 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) [2022-04-06 22:32:38,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 22:32:38,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:38,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 22:32:38,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 215 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 22:32:38,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 22:32:38,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:38,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625770036] [2022-04-06 22:32:38,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:38,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240752700] [2022-04-06 22:32:38,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240752700] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:38,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:38,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 22:32:38,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:38,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369550172] [2022-04-06 22:32:38,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369550172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:38,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:38,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:32:38,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801263064] [2022-04-06 22:32:38,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:38,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:32:38,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:38,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:32:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:32:38,586 INFO L87 Difference]: Start difference. First operand 339 states and 442 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 22:32:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:38,673 INFO L93 Difference]: Finished difference Result 349 states and 452 transitions. [2022-04-06 22:32:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:32:38,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 106 [2022-04-06 22:32:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:38,675 INFO L225 Difference]: With dead ends: 349 [2022-04-06 22:32:38,675 INFO L226 Difference]: Without dead ends: 342 [2022-04-06 22:32:38,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:32:38,676 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:38,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 196 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-04-06 22:32:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-04-06 22:32:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 219 states have (on average 1.2237442922374429) internal successors, (268), 226 states have internal predecessors, (268), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 22:32:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 445 transitions. [2022-04-06 22:32:38,706 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 445 transitions. Word has length 106 [2022-04-06 22:32:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:38,706 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 445 transitions. [2022-04-06 22:32:38,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 22:32:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 445 transitions. [2022-04-06 22:32:38,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 22:32:38,707 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:38,707 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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] [2022-04-06 22:32:38,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 22:32:38,914 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 [2022-04-06 22:32:38,914 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:38,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:38,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 3 times [2022-04-06 22:32:38,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:38,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [562626115] [2022-04-06 22:32:38,915 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:38,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 4 times [2022-04-06 22:32:38,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:38,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153128067] [2022-04-06 22:32:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:38,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:38,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:38,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572652311] [2022-04-06 22:32:38,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:38,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:38,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:38,924 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) [2022-04-06 22:32:38,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 22:32:38,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:38,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:38,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 22:32:38,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-04-06 22:32:39,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:39,725 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:32:39,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:39,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153128067] [2022-04-06 22:32:39,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:39,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572652311] [2022-04-06 22:32:39,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572652311] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:39,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:39,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 22:32:39,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:39,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [562626115] [2022-04-06 22:32:39,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [562626115] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:39,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:39,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:32:39,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587496409] [2022-04-06 22:32:39,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:39,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:32:39,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:39,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:32:39,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:32:39,824 INFO L87 Difference]: Start difference. First operand 342 states and 445 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 22:32:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:40,414 INFO L93 Difference]: Finished difference Result 369 states and 485 transitions. [2022-04-06 22:32:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:32:40,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2022-04-06 22:32:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:40,416 INFO L225 Difference]: With dead ends: 369 [2022-04-06 22:32:40,416 INFO L226 Difference]: Without dead ends: 366 [2022-04-06 22:32:40,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:32:40,416 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 34 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:40,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 318 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:32:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-04-06 22:32:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 364. [2022-04-06 22:32:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 231 states have (on average 1.2294372294372293) internal successors, (284), 239 states have internal predecessors, (284), 99 states have call successors, (99), 34 states have call predecessors, (99), 33 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-04-06 22:32:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 479 transitions. [2022-04-06 22:32:40,449 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 479 transitions. Word has length 107 [2022-04-06 22:32:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:40,449 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 479 transitions. [2022-04-06 22:32:40,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 22:32:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 479 transitions. [2022-04-06 22:32:40,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 22:32:40,450 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:40,450 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:40,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:40,667 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 [2022-04-06 22:32:40,667 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:40,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 5 times [2022-04-06 22:32:40,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:40,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1504361805] [2022-04-06 22:32:40,668 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:40,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 6 times [2022-04-06 22:32:40,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:40,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485031215] [2022-04-06 22:32:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:40,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:40,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:40,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876139718] [2022-04-06 22:32:40,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:32:40,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:40,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:40,675 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) [2022-04-06 22:32:40,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 22:32:40,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 22:32:40,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-06 22:32:40,776 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 22:32:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 22:32:40,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 22:32:40,858 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-06 22:32:40,858 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 22:32:40,860 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 22:32:40,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:41,065 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 [2022-04-06 22:32:41,068 INFO L719 BasicCegarLoop]: Path program histogram: [6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 22:32:41,070 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 22:32:41,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:32:41 BoogieIcfgContainer [2022-04-06 22:32:41,080 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 22:32:41,081 INFO L158 Benchmark]: Toolchain (without parser) took 38569.01ms. Allocated memory was 194.0MB in the beginning and 280.0MB in the end (delta: 86.0MB). Free memory was 140.2MB in the beginning and 102.3MB in the end (delta: 37.9MB). Peak memory consumption was 125.4MB. Max. memory is 8.0GB. [2022-04-06 22:32:41,081 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 194.0MB. Free memory is still 156.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 22:32:41,081 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.72ms. Allocated memory was 194.0MB in the beginning and 232.8MB in the end (delta: 38.8MB). Free memory was 140.0MB in the beginning and 203.1MB in the end (delta: -63.0MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-04-06 22:32:41,081 INFO L158 Benchmark]: Boogie Preprocessor took 40.55ms. Allocated memory is still 232.8MB. Free memory was 203.1MB in the beginning and 201.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 22:32:41,081 INFO L158 Benchmark]: RCFGBuilder took 253.57ms. Allocated memory is still 232.8MB. Free memory was 201.6MB in the beginning and 189.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 22:32:41,081 INFO L158 Benchmark]: TraceAbstraction took 38072.19ms. Allocated memory was 232.8MB in the beginning and 280.0MB in the end (delta: 47.2MB). Free memory was 189.5MB in the beginning and 102.3MB in the end (delta: 87.2MB). Peak memory consumption was 134.4MB. Max. memory is 8.0GB. [2022-04-06 22:32:41,082 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 194.0MB. Free memory is still 156.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 197.72ms. Allocated memory was 194.0MB in the beginning and 232.8MB in the end (delta: 38.8MB). Free memory was 140.0MB in the beginning and 203.1MB in the end (delta: -63.0MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.55ms. Allocated memory is still 232.8MB. Free memory was 203.1MB in the beginning and 201.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 253.57ms. Allocated memory is still 232.8MB. Free memory was 201.6MB in the beginning and 189.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 38072.19ms. Allocated memory was 232.8MB in the beginning and 280.0MB in the end (delta: 47.2MB). Free memory was 189.5MB in the beginning and 102.3MB in the end (delta: 87.2MB). Peak memory consumption was 134.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y [L37] CALL assume_abort_if_not(xy < 2147483647) [L8] COND FALSE !(!cond) [L37] RET assume_abort_if_not(xy < 2147483647) [L38] CALL assume_abort_if_not(yy < 2147483647) [L8] COND FALSE !(!cond) [L38] RET assume_abort_if_not(yy < 2147483647) [L40] EXPR counter++ [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 [L46] EXPR counter++ [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(a == k * b + c) [L48] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == y*r + x*p) [L49] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(b == x * q + y * s) [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L51] COND TRUE !(c >= b) [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k [L40] EXPR counter++ [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 [L46] EXPR counter++ [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(a == k * b + c) [L48] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == y*r + x*p) [L49] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(b == x * q + y * s) [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 [L46] EXPR counter++ [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(a == k * b + c) [L48] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == y*r + x*p) [L49] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(b == x * q + y * s) [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L51] COND TRUE !(c >= b) [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k [L40] EXPR counter++ [L40] COND FALSE !(counter++<5) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 38.0s, OverallIterations: 27, TraceHistogramMax: 13, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 705 SdHoareTripleChecker+Valid, 4.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 602 mSDsluCounter, 5029 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3782 mSDsCounter, 494 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4197 IncrementalHoareTripleChecker+Invalid, 4691 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 494 mSolverCounterUnsat, 1247 mSDtfsCounter, 4197 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3065 GetRequests, 2777 SyntacticMatches, 26 SemanticMatches, 262 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 10.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=364occurred in iteration=26, InterpolantAutomatonStates: 212, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 26 MinimizatonAttempts, 120 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-06 22:32:41,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...