/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 15:10:12,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 15:10:12,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 15:10:12,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 15:10:12,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 15:10:12,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 15:10:12,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 15:10:12,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 15:10:12,905 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 15:10:12,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 15:10:12,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 15:10:12,907 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 15:10:12,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 15:10:12,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 15:10:12,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 15:10:12,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 15:10:12,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 15:10:12,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 15:10:12,908 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 15:10:12,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 15:10:12,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 15:10:12,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 15:10:12,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 15:10:12,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 15:10:12,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 15:10:12,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 15:10:12,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:10:12,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 15:10:12,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 15:10:12,910 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 15:10:12,910 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 15:10:12,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 15:10:12,910 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 15:10:12,910 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 15:10:13,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 15:10:13,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 15:10:13,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 15:10:13,116 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 15:10:13,116 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 15:10:13,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-03-20 15:10:13,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/433bc1c5e/46bba59ed88c480ca9ff79a1f3dac306/FLAG8cac736fc [2022-03-20 15:10:13,481 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 15:10:13,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-03-20 15:10:13,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/433bc1c5e/46bba59ed88c480ca9ff79a1f3dac306/FLAG8cac736fc [2022-03-20 15:10:13,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/433bc1c5e/46bba59ed88c480ca9ff79a1f3dac306 [2022-03-20 15:10:13,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 15:10:13,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 15:10:13,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 15:10:13,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 15:10:13,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 15:10:13,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:10:13" (1/1) ... [2022-03-20 15:10:13,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@324b9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:10:13, skipping insertion in model container [2022-03-20 15:10:13,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:10:13" (1/1) ... [2022-03-20 15:10:13,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 15:10:13,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 15:10:13,643 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/egcd3-ll_valuebound100.c[490,503] [2022-03-20 15:10:13,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:10:13,670 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 15:10:13,677 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/egcd3-ll_valuebound100.c[490,503] [2022-03-20 15:10:13,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:10:13,690 INFO L208 MainTranslator]: Completed translation [2022-03-20 15:10:13,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:10:13 WrapperNode [2022-03-20 15:10:13,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 15:10:13,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 15:10:13,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 15:10:13,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 15:10:13,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:10:13" (1/1) ... [2022-03-20 15:10:13,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:10:13" (1/1) ... [2022-03-20 15:10:13,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:10:13" (1/1) ... [2022-03-20 15:10:13,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:10:13" (1/1) ... [2022-03-20 15:10:13,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:10:13" (1/1) ... [2022-03-20 15:10:13,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:10:13" (1/1) ... [2022-03-20 15:10:13,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:10:13" (1/1) ... [2022-03-20 15:10:13,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 15:10:13,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 15:10:13,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 15:10:13,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 15:10:13,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:10:13" (1/1) ... [2022-03-20 15:10:13,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:10:13,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:13,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 15:10:13,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 15:10:13,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 15:10:13,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 15:10:13,756 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 15:10:13,757 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 15:10:13,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 15:10:13,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 15:10:13,757 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 15:10:13,757 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 15:10:13,757 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 15:10:13,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 15:10:13,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 15:10:13,758 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 15:10:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 15:10:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 15:10:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 15:10:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 15:10:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 15:10:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 15:10:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 15:10:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 15:10:13,799 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 15:10:13,800 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 15:10:13,890 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 15:10:13,894 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 15:10:13,894 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 15:10:13,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:10:13 BoogieIcfgContainer [2022-03-20 15:10:13,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 15:10:13,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 15:10:13,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 15:10:13,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 15:10:13,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:10:13" (1/3) ... [2022-03-20 15:10:13,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abd4a1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:10:13, skipping insertion in model container [2022-03-20 15:10:13,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:10:13" (2/3) ... [2022-03-20 15:10:13,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abd4a1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:10:13, skipping insertion in model container [2022-03-20 15:10:13,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:10:13" (3/3) ... [2022-03-20 15:10:13,908 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2022-03-20 15:10:13,911 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 15:10:13,912 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 15:10:13,952 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 15:10:13,968 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 15:10:13,968 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 15:10:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 15:10:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 15:10:13,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:13,984 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] [2022-03-20 15:10:13,984 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:13,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-03-20 15:10:14,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:14,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [953443271] [2022-03-20 15:10:14,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 2 times [2022-03-20 15:10:14,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:14,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138101388] [2022-03-20 15:10:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:10:14,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:10:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:10:14,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:10:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:10:14,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 15:10:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:10:14,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 15:10:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:10:14,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 15:10:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:10:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:10:14,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:14,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138101388] [2022-03-20 15:10:14,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138101388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:14,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:14,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:10:14,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:14,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [953443271] [2022-03-20 15:10:14,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [953443271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:14,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:14,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:10:14,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417089065] [2022-03-20 15:10:14,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:14,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 15:10:14,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:14,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 15:10:14,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:10:14,257 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:10:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:14,336 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-20 15:10:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 15:10:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 15:10:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:14,344 INFO L225 Difference]: With dead ends: 73 [2022-03-20 15:10:14,345 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 15:10:14,347 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 [2022-03-20 15:10:14,351 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:14,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:10:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 15:10:14,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 15:10:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 15:10:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 15:10:14,394 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-20 15:10:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:14,395 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 15:10:14,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:10:14,395 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 15:10:14,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 15:10:14,396 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:14,396 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] [2022-03-20 15:10:14,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 15:10:14,397 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:14,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-03-20 15:10:14,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:14,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1445670436] [2022-03-20 15:10:14,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 2 times [2022-03-20 15:10:14,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:14,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621843327] [2022-03-20 15:10:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:14,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:14,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:14,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479461207] [2022-03-20 15:10:14,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:14,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:14,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:14,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 15:10:14,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:10:14,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:14,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:10:14,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:10:14,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:10:14,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:14,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621843327] [2022-03-20 15:10:14,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:14,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479461207] [2022-03-20 15:10:14,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479461207] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:14,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:14,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:10:14,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:14,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1445670436] [2022-03-20 15:10:14,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1445670436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:14,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:14,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:10:14,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399638606] [2022-03-20 15:10:14,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:14,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:10:14,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:14,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:10:14,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:10:14,676 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 15:10:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:14,750 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 15:10:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:10:14,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 34 [2022-03-20 15:10:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:14,753 INFO L225 Difference]: With dead ends: 54 [2022-03-20 15:10:14,753 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 15:10:14,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:10:14,755 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:14,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 197 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:10:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 15:10:14,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 15:10:14,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 15:10:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 15:10:14,766 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2022-03-20 15:10:14,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:14,766 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 15:10:14,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 15:10:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 15:10:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 15:10:14,767 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:14,767 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] [2022-03-20 15:10:14,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:14,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:14,990 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:14,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-03-20 15:10:14,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:14,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [699762061] [2022-03-20 15:10:14,991 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:14,991 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 2 times [2022-03-20 15:10:14,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:14,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502836226] [2022-03-20 15:10:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:14,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:15,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:15,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078183105] [2022-03-20 15:10:15,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:15,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:15,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:15,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:15,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 15:10:15,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:10:15,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:15,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 15:10:15,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 15:10:15,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 15:10:15,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:15,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502836226] [2022-03-20 15:10:15,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:15,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078183105] [2022-03-20 15:10:15,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078183105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:10:15,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:10:15,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 15:10:15,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:15,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [699762061] [2022-03-20 15:10:15,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [699762061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:15,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:15,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:10:15,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507136570] [2022-03-20 15:10:15,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:15,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:10:15,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:15,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:10:15,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 15:10:15,265 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:10:15,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:15,401 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-20 15:10:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:10:15,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 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 39 [2022-03-20 15:10:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:15,406 INFO L225 Difference]: With dead ends: 103 [2022-03-20 15:10:15,406 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 15:10:15,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:10:15,408 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:15,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 288 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:10:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 15:10:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-20 15:10:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 15:10:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-20 15:10:15,420 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-20 15:10:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:15,421 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-20 15:10:15,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:10:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-20 15:10:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 15:10:15,422 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:15,422 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 15:10:15,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:15,624 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 15:10:15,625 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:15,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:15,625 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-03-20 15:10:15,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:15,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23355478] [2022-03-20 15:10:15,626 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 2 times [2022-03-20 15:10:15,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:15,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585512138] [2022-03-20 15:10:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:15,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:15,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:15,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205347556] [2022-03-20 15:10:15,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:15,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:15,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:15,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:15,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 15:10:15,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:10:15,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:15,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 15:10:15,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:10:16,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:10:16,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:16,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585512138] [2022-03-20 15:10:16,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:16,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205347556] [2022-03-20 15:10:16,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205347556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:10:16,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:10:16,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-03-20 15:10:16,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:16,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23355478] [2022-03-20 15:10:16,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23355478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:16,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:16,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:10:16,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414058732] [2022-03-20 15:10:16,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:16,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:10:16,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:16,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:10:16,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:10:16,199 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 15:10:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:16,565 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2022-03-20 15:10:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 15:10:16,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2022-03-20 15:10:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:16,567 INFO L225 Difference]: With dead ends: 112 [2022-03-20 15:10:16,567 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 15:10:16,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:10:16,568 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:16,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 389 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:10:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 15:10:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-03-20 15:10:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 15:10:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-03-20 15:10:16,588 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2022-03-20 15:10:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:16,588 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-03-20 15:10:16,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 15:10:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-03-20 15:10:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 15:10:16,590 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:16,590 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, 1] [2022-03-20 15:10:16,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:16,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:16,796 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-03-20 15:10:16,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:16,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429608872] [2022-03-20 15:10:16,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:16,797 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 2 times [2022-03-20 15:10:16,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:16,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253187276] [2022-03-20 15:10:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:16,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:16,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:16,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159861839] [2022-03-20 15:10:16,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:16,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:16,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:16,812 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:16,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 15:10:16,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:10:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:16,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 15:10:16,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 15:10:17,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 15:10:17,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:17,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253187276] [2022-03-20 15:10:17,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:17,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159861839] [2022-03-20 15:10:17,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159861839] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:10:17,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:10:17,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 15:10:17,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:17,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429608872] [2022-03-20 15:10:17,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429608872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:17,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:17,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:10:17,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324064756] [2022-03-20 15:10:17,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:17,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:10:17,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:10:17,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:10:17,086 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:10:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:17,132 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2022-03-20 15:10:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:10:17,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 47 [2022-03-20 15:10:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:17,134 INFO L225 Difference]: With dead ends: 130 [2022-03-20 15:10:17,134 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 15:10:17,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:10:17,135 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:17,135 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:10:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 15:10:17,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-03-20 15:10:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 76 states have (on average 1.263157894736842) internal successors, (96), 77 states have internal predecessors, (96), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 15:10:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 172 transitions. [2022-03-20 15:10:17,154 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 172 transitions. Word has length 47 [2022-03-20 15:10:17,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:17,154 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 172 transitions. [2022-03-20 15:10:17,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:10:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 172 transitions. [2022-03-20 15:10:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 15:10:17,155 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:17,155 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:10:17,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:17,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:17,381 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2022-03-20 15:10:17,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:17,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1700273967] [2022-03-20 15:10:17,382 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 2 times [2022-03-20 15:10:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:17,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894659077] [2022-03-20 15:10:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:17,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:17,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:17,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116939682] [2022-03-20 15:10:17,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:17,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:17,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:17,393 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:17,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 15:10:17,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:10:17,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:17,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 15:10:17,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:10:17,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:10:17,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:17,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894659077] [2022-03-20 15:10:17,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:17,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116939682] [2022-03-20 15:10:17,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116939682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:10:17,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:10:17,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-03-20 15:10:17,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:17,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1700273967] [2022-03-20 15:10:17,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1700273967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:17,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:17,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:10:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579105332] [2022-03-20 15:10:17,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:17,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:10:17,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:10:17,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:10:17,861 INFO L87 Difference]: Start difference. First operand 123 states and 172 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 15:10:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:18,023 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2022-03-20 15:10:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:10:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-03-20 15:10:18,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:18,026 INFO L225 Difference]: With dead ends: 137 [2022-03-20 15:10:18,026 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 15:10:18,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:10:18,028 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 87 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:18,028 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 254 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:10:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 15:10:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-03-20 15:10:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 83 states have internal predecessors, (102), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 15:10:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-03-20 15:10:18,070 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 47 [2022-03-20 15:10:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:18,070 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-03-20 15:10:18,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 15:10:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-03-20 15:10:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 15:10:18,075 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:18,075 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:10:18,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:18,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:18,291 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 3 times [2022-03-20 15:10:18,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:18,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1309641911] [2022-03-20 15:10:18,293 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 4 times [2022-03-20 15:10:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:18,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487332970] [2022-03-20 15:10:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:18,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:18,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:18,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947763446] [2022-03-20 15:10:18,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:10:18,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:18,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:18,303 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:18,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 15:10:18,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:10:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:18,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 15:10:18,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:10:18,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:10:18,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:18,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487332970] [2022-03-20 15:10:18,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:18,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947763446] [2022-03-20 15:10:18,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947763446] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:18,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:18,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:10:18,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:18,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1309641911] [2022-03-20 15:10:18,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1309641911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:18,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:18,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:10:18,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988465126] [2022-03-20 15:10:18,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:18,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:10:18,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:18,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:10:18,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:10:18,394 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 15:10:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:18,446 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2022-03-20 15:10:18,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:10:18,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 47 [2022-03-20 15:10:18,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:18,447 INFO L225 Difference]: With dead ends: 170 [2022-03-20 15:10:18,447 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 15:10:18,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 15:10:18,448 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:18,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:10:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 15:10:18,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2022-03-20 15:10:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 15:10:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-03-20 15:10:18,460 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 47 [2022-03-20 15:10:18,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:18,460 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-03-20 15:10:18,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 15:10:18,460 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-03-20 15:10:18,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 15:10:18,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:18,461 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, 1] [2022-03-20 15:10:18,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 15:10:18,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:18,676 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-03-20 15:10:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:18,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1274836388] [2022-03-20 15:10:18,677 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:18,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 2 times [2022-03-20 15:10:18,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:18,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037007963] [2022-03-20 15:10:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:18,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:18,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:18,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140302969] [2022-03-20 15:10:18,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:18,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:18,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:18,691 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:18,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 15:10:18,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:10:18,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:18,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:10:18,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 15:10:18,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:10:18,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:18,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037007963] [2022-03-20 15:10:18,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:18,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140302969] [2022-03-20 15:10:18,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140302969] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:18,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:18,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:10:18,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:18,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1274836388] [2022-03-20 15:10:18,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1274836388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:18,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:18,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:10:18,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824289855] [2022-03-20 15:10:18,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:18,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:10:18,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:10:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:10:18,815 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 15:10:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:18,870 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2022-03-20 15:10:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:10:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-20 15:10:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:18,872 INFO L225 Difference]: With dead ends: 158 [2022-03-20 15:10:18,872 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 15:10:18,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:10:18,873 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:18,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:10:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 15:10:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2022-03-20 15:10:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 74 states have (on average 1.162162162162162) internal successors, (86), 81 states have internal predecessors, (86), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 15:10:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2022-03-20 15:10:18,891 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 52 [2022-03-20 15:10:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:18,891 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2022-03-20 15:10:18,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 15:10:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2022-03-20 15:10:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 15:10:18,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:18,892 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, 1, 1] [2022-03-20 15:10:18,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:19,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:19,113 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-03-20 15:10:19,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:19,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [304259410] [2022-03-20 15:10:19,113 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:19,114 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 2 times [2022-03-20 15:10:19,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:19,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847180166] [2022-03-20 15:10:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:19,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:19,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:19,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157076432] [2022-03-20 15:10:19,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:19,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:19,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:19,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:19,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 15:10:19,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:10:19,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:19,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 15:10:19,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 15:10:19,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 15:10:20,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:20,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847180166] [2022-03-20 15:10:20,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:20,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157076432] [2022-03-20 15:10:20,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157076432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:10:20,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:10:20,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 15:10:20,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:20,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [304259410] [2022-03-20 15:10:20,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [304259410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:20,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:20,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:10:20,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510956970] [2022-03-20 15:10:20,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:20,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:10:20,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:20,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:10:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 15:10:20,293 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 15:10:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:20,657 INFO L93 Difference]: Finished difference Result 200 states and 283 transitions. [2022-03-20 15:10:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:10:20,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 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 64 [2022-03-20 15:10:20,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:20,660 INFO L225 Difference]: With dead ends: 200 [2022-03-20 15:10:20,660 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 15:10:20,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:10:20,660 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:20,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 423 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:10:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 15:10:20,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2022-03-20 15:10:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 110 states have internal predecessors, (119), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 69 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 15:10:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 275 transitions. [2022-03-20 15:10:20,683 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 275 transitions. Word has length 64 [2022-03-20 15:10:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:20,683 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 275 transitions. [2022-03-20 15:10:20,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 15:10:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 275 transitions. [2022-03-20 15:10:20,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 15:10:20,684 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:20,684 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:10:20,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 15:10:20,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 15:10:20,901 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 3 times [2022-03-20 15:10:20,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:20,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1198114499] [2022-03-20 15:10:20,901 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:20,902 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 4 times [2022-03-20 15:10:20,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:20,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139298010] [2022-03-20 15:10:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:20,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:20,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:20,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137502761] [2022-03-20 15:10:20,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:10:20,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:20,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:20,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:20,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 15:10:20,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:10:20,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:20,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 15:10:20,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 15:10:21,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 15:10:21,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:21,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139298010] [2022-03-20 15:10:21,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:21,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137502761] [2022-03-20 15:10:21,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137502761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:10:21,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:10:21,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-20 15:10:21,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:21,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1198114499] [2022-03-20 15:10:21,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1198114499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:21,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:21,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:10:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150355145] [2022-03-20 15:10:21,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:21,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:10:21,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:10:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:10:21,178 INFO L87 Difference]: Start difference. First operand 193 states and 275 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2022-03-20 15:10:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:21,439 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2022-03-20 15:10:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:10:21,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 69 [2022-03-20 15:10:21,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:21,444 INFO L225 Difference]: With dead ends: 288 [2022-03-20 15:10:21,444 INFO L226 Difference]: Without dead ends: 281 [2022-03-20 15:10:21,444 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-03-20 15:10:21,445 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 46 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:21,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:10:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-20 15:10:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 208. [2022-03-20 15:10:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.206896551724138) internal successors, (140), 122 states have internal predecessors, (140), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 15:10:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 296 transitions. [2022-03-20 15:10:21,474 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 296 transitions. Word has length 69 [2022-03-20 15:10:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:21,474 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 296 transitions. [2022-03-20 15:10:21,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2022-03-20 15:10:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 296 transitions. [2022-03-20 15:10:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 15:10:21,475 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:21,475 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-03-20 15:10:21,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:21,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 15:10:21,691 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2022-03-20 15:10:21,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:21,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1007930515] [2022-03-20 15:10:21,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 2 times [2022-03-20 15:10:21,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:21,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462284262] [2022-03-20 15:10:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:21,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:21,699 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:21,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088964331] [2022-03-20 15:10:21,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:21,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:21,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:21,704 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:21,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 15:10:21,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:10:21,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:21,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:10:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 15:10:21,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-20 15:10:21,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:21,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462284262] [2022-03-20 15:10:21,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:21,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088964331] [2022-03-20 15:10:21,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088964331] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:10:21,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:10:21,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 15:10:21,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:21,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1007930515] [2022-03-20 15:10:21,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1007930515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:21,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:21,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:10:21,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487001308] [2022-03-20 15:10:21,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:21,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:10:21,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:21,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:10:21,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 15:10:21,996 INFO L87 Difference]: Start difference. First operand 208 states and 296 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:10:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:22,042 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-03-20 15:10:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:10:22,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-03-20 15:10:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:22,046 INFO L225 Difference]: With dead ends: 214 [2022-03-20 15:10:22,046 INFO L226 Difference]: Without dead ends: 212 [2022-03-20 15:10:22,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:10:22,047 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:22,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 145 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:10:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-20 15:10:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-20 15:10:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 125 states have internal predecessors, (143), 79 states have call successors, (79), 14 states have call predecessors, (79), 13 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 15:10:22,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 299 transitions. [2022-03-20 15:10:22,071 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 299 transitions. Word has length 74 [2022-03-20 15:10:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:22,071 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 299 transitions. [2022-03-20 15:10:22,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:10:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 299 transitions. [2022-03-20 15:10:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 15:10:22,072 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:22,072 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:10:22,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:22,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 15:10:22,279 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2022-03-20 15:10:22,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:22,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [882884340] [2022-03-20 15:10:22,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 2 times [2022-03-20 15:10:22,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:22,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566332009] [2022-03-20 15:10:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:22,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:22,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714244077] [2022-03-20 15:10:22,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:22,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:22,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:22,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:22,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 15:10:22,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:10:22,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:22,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 15:10:22,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 15:10:22,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 15:10:22,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:22,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566332009] [2022-03-20 15:10:22,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:22,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714244077] [2022-03-20 15:10:22,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714244077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:10:22,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:10:22,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 15:10:22,583 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:22,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [882884340] [2022-03-20 15:10:22,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [882884340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:22,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:22,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:10:22,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77038632] [2022-03-20 15:10:22,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:22,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:10:22,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:22,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:10:22,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 15:10:22,584 INFO L87 Difference]: Start difference. First operand 212 states and 299 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:10:22,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:22,745 INFO L93 Difference]: Finished difference Result 226 states and 310 transitions. [2022-03-20 15:10:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:10:22,746 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), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-03-20 15:10:22,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:22,747 INFO L225 Difference]: With dead ends: 226 [2022-03-20 15:10:22,747 INFO L226 Difference]: Without dead ends: 224 [2022-03-20 15:10:22,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:10:22,748 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:22,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 196 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:10:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-20 15:10:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-03-20 15:10:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 128 states have (on average 1.1875) internal successors, (152), 134 states have internal predecessors, (152), 79 states have call successors, (79), 17 states have call predecessors, (79), 16 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 15:10:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 308 transitions. [2022-03-20 15:10:22,776 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 308 transitions. Word has length 72 [2022-03-20 15:10:22,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:22,776 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 308 transitions. [2022-03-20 15:10:22,776 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), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:10:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 308 transitions. [2022-03-20 15:10:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 15:10:22,777 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:22,777 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:10:22,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:22,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 15:10:22,990 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:22,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:22,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 3 times [2022-03-20 15:10:22,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:22,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1965675139] [2022-03-20 15:10:22,991 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:22,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 4 times [2022-03-20 15:10:22,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:22,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045310275] [2022-03-20 15:10:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:22,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:22,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154295414] [2022-03-20 15:10:22,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:10:22,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:22,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:22,999 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:23,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 15:10:23,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:10:23,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:23,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 15:10:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 15:10:23,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:10:23,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:23,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045310275] [2022-03-20 15:10:23,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:23,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154295414] [2022-03-20 15:10:23,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154295414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:23,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:23,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:10:23,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:23,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1965675139] [2022-03-20 15:10:23,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1965675139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:23,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:23,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:10:23,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753641397] [2022-03-20 15:10:23,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:23,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:10:23,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:23,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:10:23,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:10:23,125 INFO L87 Difference]: Start difference. First operand 224 states and 308 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 15:10:23,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:23,189 INFO L93 Difference]: Finished difference Result 367 states and 500 transitions. [2022-03-20 15:10:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:10:23,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-20 15:10:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:23,191 INFO L225 Difference]: With dead ends: 367 [2022-03-20 15:10:23,191 INFO L226 Difference]: Without dead ends: 230 [2022-03-20 15:10:23,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:10:23,194 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:23,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:10:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-20 15:10:23,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2022-03-20 15:10:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 127 states have internal predecessors, (149), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-20 15:10:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 289 transitions. [2022-03-20 15:10:23,244 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 289 transitions. Word has length 77 [2022-03-20 15:10:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:23,244 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 289 transitions. [2022-03-20 15:10:23,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 15:10:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 289 transitions. [2022-03-20 15:10:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 15:10:23,244 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:23,245 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:10:23,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:23,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 15:10:23,459 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 5 times [2022-03-20 15:10:23,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:23,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [340543769] [2022-03-20 15:10:23,460 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 6 times [2022-03-20 15:10:23,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:23,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395558060] [2022-03-20 15:10:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:23,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:23,466 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:23,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990023844] [2022-03-20 15:10:23,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:10:23,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:23,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:23,473 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:23,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 15:10:23,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:10:23,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:23,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 15:10:23,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 15:10:24,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:24,627 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:10:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 15:10:24,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:24,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395558060] [2022-03-20 15:10:24,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:24,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990023844] [2022-03-20 15:10:24,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990023844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:10:24,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:10:24,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2022-03-20 15:10:24,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:24,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [340543769] [2022-03-20 15:10:24,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [340543769] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:24,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:24,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:10:24,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137123993] [2022-03-20 15:10:24,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:24,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:10:24,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:24,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:10:24,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:10:24,689 INFO L87 Difference]: Start difference. First operand 214 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 15:10:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:25,182 INFO L93 Difference]: Finished difference Result 285 states and 377 transitions. [2022-03-20 15:10:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 15:10:25,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 77 [2022-03-20 15:10:25,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:25,184 INFO L225 Difference]: With dead ends: 285 [2022-03-20 15:10:25,184 INFO L226 Difference]: Without dead ends: 283 [2022-03-20 15:10:25,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-20 15:10:25,185 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 59 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:25,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 536 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:10:25,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-20 15:10:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 265. [2022-03-20 15:10:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 157 states have (on average 1.178343949044586) internal successors, (185), 158 states have internal predecessors, (185), 87 states have call successors, (87), 21 states have call predecessors, (87), 20 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-20 15:10:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2022-03-20 15:10:25,222 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 77 [2022-03-20 15:10:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:25,222 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2022-03-20 15:10:25,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 15:10:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2022-03-20 15:10:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 15:10:25,224 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:25,224 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, 1, 1, 1] [2022-03-20 15:10:25,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:25,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 15:10:25,441 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:25,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2022-03-20 15:10:25,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:25,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [496966853] [2022-03-20 15:10:25,442 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:25,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 2 times [2022-03-20 15:10:25,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:25,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694410136] [2022-03-20 15:10:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:25,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:25,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:25,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729251332] [2022-03-20 15:10:25,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:25,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:25,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:25,450 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:25,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 15:10:25,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:10:25,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:25,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 15:10:25,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 15:10:26,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 15:10:27,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:27,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694410136] [2022-03-20 15:10:27,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:27,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729251332] [2022-03-20 15:10:27,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729251332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:10:27,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:10:27,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-20 15:10:27,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:27,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [496966853] [2022-03-20 15:10:27,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [496966853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:27,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:27,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:10:27,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664957514] [2022-03-20 15:10:27,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:27,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:10:27,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:27,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:10:27,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:10:27,325 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 15:10:27,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:27,871 INFO L93 Difference]: Finished difference Result 348 states and 475 transitions. [2022-03-20 15:10:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:10:27,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-03-20 15:10:27,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:27,873 INFO L225 Difference]: With dead ends: 348 [2022-03-20 15:10:27,873 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 15:10:27,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:10:27,874 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:27,874 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 437 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:10:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 15:10:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 330. [2022-03-20 15:10:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 191 states have (on average 1.193717277486911) internal successors, (228), 192 states have internal predecessors, (228), 115 states have call successors, (115), 24 states have call predecessors, (115), 23 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-03-20 15:10:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 456 transitions. [2022-03-20 15:10:27,920 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 456 transitions. Word has length 86 [2022-03-20 15:10:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:27,920 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 456 transitions. [2022-03-20 15:10:27,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 15:10:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 456 transitions. [2022-03-20 15:10:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 15:10:27,921 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:27,922 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, 1, 1] [2022-03-20 15:10:27,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:28,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:28,131 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:28,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 3 times [2022-03-20 15:10:28,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:28,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [279777877] [2022-03-20 15:10:28,132 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:28,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 4 times [2022-03-20 15:10:28,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:28,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923791276] [2022-03-20 15:10:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:28,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:28,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:28,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684645971] [2022-03-20 15:10:28,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:10:28,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:28,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:28,141 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:28,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 15:10:28,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:10:28,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:28,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 15:10:28,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:28,970 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:10:28,980 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:10:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 15:10:41,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:43,016 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:10:43,018 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:10:48,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:48,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923791276] [2022-03-20 15:10:48,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:48,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684645971] [2022-03-20 15:10:48,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684645971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:10:48,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:10:48,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 15:10:48,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:48,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [279777877] [2022-03-20 15:10:48,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [279777877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:48,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:48,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:10:48,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622554654] [2022-03-20 15:10:48,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:48,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:10:48,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:10:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=594, Unknown=1, NotChecked=0, Total=702 [2022-03-20 15:10:48,370 INFO L87 Difference]: Start difference. First operand 330 states and 456 transitions. Second operand has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 15:10:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:49,401 INFO L93 Difference]: Finished difference Result 377 states and 518 transitions. [2022-03-20 15:10:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:10:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2022-03-20 15:10:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:49,403 INFO L225 Difference]: With dead ends: 377 [2022-03-20 15:10:49,404 INFO L226 Difference]: Without dead ends: 374 [2022-03-20 15:10:49,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=166, Invalid=889, Unknown=1, NotChecked=0, Total=1056 [2022-03-20 15:10:49,404 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 57 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:49,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 587 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 615 Invalid, 0 Unknown, 133 Unchecked, 0.5s Time] [2022-03-20 15:10:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-03-20 15:10:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 359. [2022-03-20 15:10:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 206 states have (on average 1.1990291262135921) internal successors, (247), 207 states have internal predecessors, (247), 127 states have call successors, (127), 26 states have call predecessors, (127), 25 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 15:10:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 499 transitions. [2022-03-20 15:10:49,459 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 499 transitions. Word has length 91 [2022-03-20 15:10:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:49,459 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 499 transitions. [2022-03-20 15:10:49,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 15:10:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 499 transitions. [2022-03-20 15:10:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 15:10:49,472 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:49,472 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 3, 3, 3, 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, 1] [2022-03-20 15:10:49,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:49,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 15:10:49,688 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1983923522, now seen corresponding path program 1 times [2022-03-20 15:10:49,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:49,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2010328930] [2022-03-20 15:10:49,689 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1983923522, now seen corresponding path program 2 times [2022-03-20 15:10:49,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:49,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716843885] [2022-03-20 15:10:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:49,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:49,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:49,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030754841] [2022-03-20 15:10:49,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:49,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:49,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:49,696 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:49,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 15:10:49,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:10:49,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:49,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 15:10:49,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:10:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 64 proven. 45 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 15:10:50,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:10:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 80 proven. 19 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 15:10:56,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:10:56,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716843885] [2022-03-20 15:10:56,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:10:56,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030754841] [2022-03-20 15:10:56,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030754841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:10:56,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:10:56,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-03-20 15:10:56,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:10:56,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2010328930] [2022-03-20 15:10:56,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2010328930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:10:56,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:10:56,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:10:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427922985] [2022-03-20 15:10:56,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:10:56,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:10:56,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:56,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:10:56,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:10:56,496 INFO L87 Difference]: Start difference. First operand 359 states and 499 transitions. Second operand has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:10:58,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:10:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:10:59,194 INFO L93 Difference]: Finished difference Result 425 states and 583 transitions. [2022-03-20 15:10:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:10:59,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 99 [2022-03-20 15:10:59,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:10:59,197 INFO L225 Difference]: With dead ends: 425 [2022-03-20 15:10:59,197 INFO L226 Difference]: Without dead ends: 423 [2022-03-20 15:10:59,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:10:59,198 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 67 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:10:59,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 693 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 936 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 15:10:59,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-20 15:10:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 363. [2022-03-20 15:10:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 209 states have (on average 1.1961722488038278) internal successors, (250), 210 states have internal predecessors, (250), 127 states have call successors, (127), 27 states have call predecessors, (127), 26 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 15:10:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 502 transitions. [2022-03-20 15:10:59,253 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 502 transitions. Word has length 99 [2022-03-20 15:10:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:10:59,254 INFO L478 AbstractCegarLoop]: Abstraction has 363 states and 502 transitions. [2022-03-20 15:10:59,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:10:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 502 transitions. [2022-03-20 15:10:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 15:10:59,255 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:10:59,256 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-20 15:10:59,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 15:10:59,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 15:10:59,471 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:10:59,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:10:59,472 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 7 times [2022-03-20 15:10:59,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:10:59,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1419401439] [2022-03-20 15:10:59,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:10:59,472 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 8 times [2022-03-20 15:10:59,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:10:59,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459853909] [2022-03-20 15:10:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:10:59,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:10:59,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:10:59,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023871409] [2022-03-20 15:10:59,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:10:59,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:10:59,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:10:59,479 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:10:59,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 15:10:59,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:10:59,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:10:59,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 15:10:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:11:00,191 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:11:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 26 proven. 92 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 15:11:00,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:11:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 69 proven. 27 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-20 15:11:00,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:11:00,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459853909] [2022-03-20 15:11:00,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:11:00,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023871409] [2022-03-20 15:11:00,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023871409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:11:00,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:11:00,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-03-20 15:11:00,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:11:00,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1419401439] [2022-03-20 15:11:00,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1419401439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:11:00,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:11:00,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:11:00,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916686723] [2022-03-20 15:11:00,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:11:00,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:11:00,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:11:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:11:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:11:00,830 INFO L87 Difference]: Start difference. First operand 363 states and 502 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 15:11:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:11:01,866 INFO L93 Difference]: Finished difference Result 470 states and 646 transitions. [2022-03-20 15:11:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:11:01,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 102 [2022-03-20 15:11:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:11:01,869 INFO L225 Difference]: With dead ends: 470 [2022-03-20 15:11:01,869 INFO L226 Difference]: Without dead ends: 468 [2022-03-20 15:11:01,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:11:01,869 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 57 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:11:01,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 672 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 15:11:01,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-03-20 15:11:01,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 407. [2022-03-20 15:11:01,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 234 states have (on average 1.1965811965811965) internal successors, (280), 235 states have internal predecessors, (280), 143 states have call successors, (143), 30 states have call predecessors, (143), 29 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2022-03-20 15:11:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 564 transitions. [2022-03-20 15:11:01,943 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 564 transitions. Word has length 102 [2022-03-20 15:11:01,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:11:01,944 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 564 transitions. [2022-03-20 15:11:01,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 15:11:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 564 transitions. [2022-03-20 15:11:01,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 15:11:01,946 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:11:01,946 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:11:01,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 15:11:02,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 15:11:02,176 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:11:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:11:02,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 5 times [2022-03-20 15:11:02,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:11:02,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [264202985] [2022-03-20 15:11:02,177 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:11:02,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 6 times [2022-03-20 15:11:02,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:11:02,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573772056] [2022-03-20 15:11:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:11:02,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:11:02,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:11:02,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428448767] [2022-03-20 15:11:02,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:11:02,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:11:02,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:11:02,184 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:11:02,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 15:11:02,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:11:02,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:11:02,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 15:11:02,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:11:02,868 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:11:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 15:11:03,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:11:03,172 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:11:51,644 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:12:01,694 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:12:32,072 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:12:54,690 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:13:04,815 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:14:23,261 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_121 Int) (v_main_~s~0_BEFORE_CALL_108 Int) (v_main_~k~0_BEFORE_CALL_90 Int) (v_main_~q~0_BEFORE_CALL_96 Int) (v_main_~x~0_BEFORE_CALL_116 Int) (v_main_~r~0_BEFORE_CALL_95 Int) (v_main_~p~0_BEFORE_CALL_95 Int) (v_main_~d~0_BEFORE_CALL_84 Int) (v_main_~b~0_BEFORE_CALL_125 Int)) (let ((.cse0 (* v_main_~d~0_BEFORE_CALL_84 v_main_~b~0_BEFORE_CALL_125))) (or (= (mod .cse0 v_main_~b~0_BEFORE_CALL_125) 0) (= (+ (* v_main_~p~0_BEFORE_CALL_95 v_main_~x~0_BEFORE_CALL_116) v_main_~b~0_BEFORE_CALL_125 (* v_main_~r~0_BEFORE_CALL_95 v_main_~y~0_BEFORE_CALL_121)) (+ (* v_main_~q~0_BEFORE_CALL_96 v_main_~x~0_BEFORE_CALL_116 v_main_~k~0_BEFORE_CALL_90) (* v_main_~q~0_BEFORE_CALL_96 v_main_~x~0_BEFORE_CALL_116) (* v_main_~q~0_BEFORE_CALL_96 v_main_~d~0_BEFORE_CALL_84 v_main_~x~0_BEFORE_CALL_116) (* v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108) (* v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108 v_main_~k~0_BEFORE_CALL_90) (* v_main_~d~0_BEFORE_CALL_84 v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108))) (<= .cse0 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true [2022-03-20 15:14:55,346 WARN L855 $PredicateComparison]: unable to prove that (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_121 Int) (v_main_~s~0_BEFORE_CALL_108 Int) (v_main_~k~0_BEFORE_CALL_90 Int) (v_main_~q~0_BEFORE_CALL_96 Int) (v_main_~x~0_BEFORE_CALL_116 Int) (v_main_~r~0_BEFORE_CALL_95 Int) (v_main_~p~0_BEFORE_CALL_95 Int) (v_main_~d~0_BEFORE_CALL_84 Int) (v_main_~b~0_BEFORE_CALL_125 Int)) (let ((.cse0 (* v_main_~d~0_BEFORE_CALL_84 v_main_~b~0_BEFORE_CALL_125))) (or (= (mod .cse0 v_main_~b~0_BEFORE_CALL_125) 0) (= (+ (* v_main_~p~0_BEFORE_CALL_95 v_main_~x~0_BEFORE_CALL_116) v_main_~b~0_BEFORE_CALL_125 (* v_main_~r~0_BEFORE_CALL_95 v_main_~y~0_BEFORE_CALL_121)) (+ (* v_main_~q~0_BEFORE_CALL_96 v_main_~x~0_BEFORE_CALL_116 v_main_~k~0_BEFORE_CALL_90) (* v_main_~q~0_BEFORE_CALL_96 v_main_~x~0_BEFORE_CALL_116) (* v_main_~q~0_BEFORE_CALL_96 v_main_~d~0_BEFORE_CALL_84 v_main_~x~0_BEFORE_CALL_116) (* v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108) (* v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108 v_main_~k~0_BEFORE_CALL_90) (* v_main_~d~0_BEFORE_CALL_84 v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108))) (<= .cse0 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-20 15:15:13,387 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~y~0_BEFORE_CALL_121 Int) (v_main_~s~0_BEFORE_CALL_108 Int) (v_main_~k~0_BEFORE_CALL_90 Int) (v_main_~q~0_BEFORE_CALL_96 Int) (v_main_~x~0_BEFORE_CALL_116 Int) (v_main_~r~0_BEFORE_CALL_95 Int) (v_main_~p~0_BEFORE_CALL_95 Int) (v_main_~d~0_BEFORE_CALL_84 Int) (v_main_~b~0_BEFORE_CALL_125 Int)) (let ((.cse0 (* v_main_~d~0_BEFORE_CALL_84 v_main_~b~0_BEFORE_CALL_125))) (or (= (mod .cse0 v_main_~b~0_BEFORE_CALL_125) 0) (= (+ (* v_main_~p~0_BEFORE_CALL_95 v_main_~x~0_BEFORE_CALL_116) v_main_~b~0_BEFORE_CALL_125 (* v_main_~r~0_BEFORE_CALL_95 v_main_~y~0_BEFORE_CALL_121)) (+ (* v_main_~q~0_BEFORE_CALL_96 v_main_~x~0_BEFORE_CALL_116 v_main_~k~0_BEFORE_CALL_90) (* v_main_~q~0_BEFORE_CALL_96 v_main_~x~0_BEFORE_CALL_116) (* v_main_~q~0_BEFORE_CALL_96 v_main_~d~0_BEFORE_CALL_84 v_main_~x~0_BEFORE_CALL_116) (* v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108) (* v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108 v_main_~k~0_BEFORE_CALL_90) (* v_main_~d~0_BEFORE_CALL_84 v_main_~y~0_BEFORE_CALL_121 v_main_~s~0_BEFORE_CALL_108))) (<= .cse0 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-03-20 15:15:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 224 trivial. 5 not checked. [2022-03-20 15:15:14,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:15:14,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573772056] [2022-03-20 15:15:14,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:15:14,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428448767] [2022-03-20 15:15:14,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428448767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:15:14,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:15:14,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2022-03-20 15:15:14,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:15:14,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [264202985] [2022-03-20 15:15:14,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [264202985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:15:14,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:15:14,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:15:14,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303536975] [2022-03-20 15:15:14,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:15:14,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:15:14,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:15:14,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=390, Unknown=3, NotChecked=126, Total=600 [2022-03-20 15:15:14,174 INFO L87 Difference]: Start difference. First operand 407 states and 564 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 15:15:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:15:14,828 INFO L93 Difference]: Finished difference Result 495 states and 680 transitions. [2022-03-20 15:15:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:15:14,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2022-03-20 15:15:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:15:14,831 INFO L225 Difference]: With dead ends: 495 [2022-03-20 15:15:14,831 INFO L226 Difference]: Without dead ends: 492 [2022-03-20 15:15:14,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=149, Invalid=672, Unknown=3, NotChecked=168, Total=992 [2022-03-20 15:15:14,832 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 46 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:15:14,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 473 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 15:15:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-20 15:15:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 409. [2022-03-20 15:15:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 238 states have (on average 1.1890756302521008) internal successors, (283), 239 states have internal predecessors, (283), 139 states have call successors, (139), 32 states have call predecessors, (139), 31 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2022-03-20 15:15:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 559 transitions. [2022-03-20 15:15:14,903 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 559 transitions. Word has length 108 [2022-03-20 15:15:14,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:15:14,903 INFO L478 AbstractCegarLoop]: Abstraction has 409 states and 559 transitions. [2022-03-20 15:15:14,903 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 15:15:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 559 transitions. [2022-03-20 15:15:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 15:15:14,904 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:15:14,904 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:15:14,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 15:15:15,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:15,121 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:15:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:15:15,121 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 9 times [2022-03-20 15:15:15,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:15,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1351058813] [2022-03-20 15:15:15,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:15:15,121 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 10 times [2022-03-20 15:15:15,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:15:15,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619914054] [2022-03-20 15:15:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:15:15,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:15:15,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:15:15,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591995082] [2022-03-20 15:15:15,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:15:15,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:15,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:15:15,129 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:15:15,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 15:15:15,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:15:15,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:15:15,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 15:15:15,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:15:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 57 proven. 73 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-20 15:15:16,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:15:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-20 15:15:17,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:15:17,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619914054] [2022-03-20 15:15:17,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:15:17,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591995082] [2022-03-20 15:15:17,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591995082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:15:17,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:15:17,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 30 [2022-03-20 15:15:17,856 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:15:17,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1351058813] [2022-03-20 15:15:17,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1351058813] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:15:17,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:15:17,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 15:15:17,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890951504] [2022-03-20 15:15:17,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:15:17,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 15:15:17,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:17,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 15:15:17,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:15:17,857 INFO L87 Difference]: Start difference. First operand 409 states and 559 transitions. Second operand has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:15:19,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:15:19,452 INFO L93 Difference]: Finished difference Result 519 states and 707 transitions. [2022-03-20 15:15:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 15:15:19,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 107 [2022-03-20 15:15:19,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:15:19,455 INFO L225 Difference]: With dead ends: 519 [2022-03-20 15:15:19,455 INFO L226 Difference]: Without dead ends: 517 [2022-03-20 15:15:19,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 15:15:19,455 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 85 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:15:19,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 759 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 15:15:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-03-20 15:15:19,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 495. [2022-03-20 15:15:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 288 states have (on average 1.1909722222222223) internal successors, (343), 289 states have internal predecessors, (343), 171 states have call successors, (171), 36 states have call predecessors, (171), 35 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-03-20 15:15:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 683 transitions. [2022-03-20 15:15:19,566 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 683 transitions. Word has length 107 [2022-03-20 15:15:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:15:19,566 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 683 transitions. [2022-03-20 15:15:19,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:15:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 683 transitions. [2022-03-20 15:15:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 15:15:19,567 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:15:19,567 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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, 1, 1, 1, 1] [2022-03-20 15:15:19,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 15:15:19,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:19,783 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:15:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:15:19,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 7 times [2022-03-20 15:15:19,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:19,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1486989637] [2022-03-20 15:15:19,784 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:15:19,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 8 times [2022-03-20 15:15:19,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:15:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753417035] [2022-03-20 15:15:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:15:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:15:19,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:15:19,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773362365] [2022-03-20 15:15:19,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:15:19,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:19,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:15:19,793 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:15:19,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 15:15:19,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:15:19,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:15:19,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 15:15:19,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:15:20,698 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 90 proven. 42 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 15:15:22,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:15:23,038 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:23,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:15:23,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753417035] [2022-03-20 15:15:23,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:15:23,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773362365] [2022-03-20 15:15:23,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773362365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:15:23,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:15:23,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 15:15:23,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:15:23,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1486989637] [2022-03-20 15:15:23,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1486989637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:15:23,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:15:23,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:15:23,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83603093] [2022-03-20 15:15:23,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:15:23,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:15:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:15:23,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:15:23,540 INFO L87 Difference]: Start difference. First operand 495 states and 683 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:15:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:15:24,817 INFO L93 Difference]: Finished difference Result 584 states and 806 transitions. [2022-03-20 15:15:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:15:24,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2022-03-20 15:15:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:15:24,821 INFO L225 Difference]: With dead ends: 584 [2022-03-20 15:15:24,821 INFO L226 Difference]: Without dead ends: 581 [2022-03-20 15:15:24,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-20 15:15:24,822 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 48 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:15:24,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 603 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 15:15:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-20 15:15:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 527. [2022-03-20 15:15:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 306 states have (on average 1.1928104575163399) internal successors, (365), 307 states have internal predecessors, (365), 183 states have call successors, (183), 38 states have call predecessors, (183), 37 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2022-03-20 15:15:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 729 transitions. [2022-03-20 15:15:24,937 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 729 transitions. Word has length 111 [2022-03-20 15:15:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:15:24,937 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 729 transitions. [2022-03-20 15:15:24,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:15:24,937 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 729 transitions. [2022-03-20 15:15:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 15:15:24,938 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:15:24,938 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, 1, 1, 1] [2022-03-20 15:15:24,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 15:15:25,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 15:15:25,155 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:15:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:15:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 9 times [2022-03-20 15:15:25,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:25,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1852511458] [2022-03-20 15:15:25,156 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:15:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 10 times [2022-03-20 15:15:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:15:25,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646162199] [2022-03-20 15:15:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:15:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:15:25,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:15:25,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324911157] [2022-03-20 15:15:25,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:15:25,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:25,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:15:25,163 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:15:25,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 15:15:25,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:15:25,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:15:25,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 15:15:25,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:15:26,202 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:26,207 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:26,209 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 15:15:37,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:15:41,044 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:41,046 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:43,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:15:43,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646162199] [2022-03-20 15:15:43,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:15:43,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324911157] [2022-03-20 15:15:43,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324911157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:15:43,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:15:43,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-20 15:15:43,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:15:43,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1852511458] [2022-03-20 15:15:43,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1852511458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:15:43,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:15:43,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 15:15:43,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717221966] [2022-03-20 15:15:43,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:15:44,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 15:15:44,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:44,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 15:15:44,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=642, Unknown=2, NotChecked=0, Total=756 [2022-03-20 15:15:44,001 INFO L87 Difference]: Start difference. First operand 527 states and 729 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:15:50,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:15:50,609 INFO L93 Difference]: Finished difference Result 619 states and 855 transitions. [2022-03-20 15:15:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 15:15:50,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 113 [2022-03-20 15:15:50,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:15:50,613 INFO L225 Difference]: With dead ends: 619 [2022-03-20 15:15:50,613 INFO L226 Difference]: Without dead ends: 616 [2022-03-20 15:15:50,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=146, Invalid=908, Unknown=2, NotChecked=0, Total=1056 [2022-03-20 15:15:50,614 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 65 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:15:50,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 734 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 15:15:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-03-20 15:15:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 596. [2022-03-20 15:15:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 343 states have (on average 1.1982507288629738) internal successors, (411), 344 states have internal predecessors, (411), 211 states have call successors, (211), 42 states have call predecessors, (211), 41 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2022-03-20 15:15:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 831 transitions. [2022-03-20 15:15:50,739 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 831 transitions. Word has length 113 [2022-03-20 15:15:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:15:50,739 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 831 transitions. [2022-03-20 15:15:50,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:15:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 831 transitions. [2022-03-20 15:15:50,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 15:15:50,744 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:15:50,744 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:15:50,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 15:15:50,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 15:15:50,951 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:15:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:15:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 11 times [2022-03-20 15:15:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:50,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [786637522] [2022-03-20 15:15:50,952 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:15:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 12 times [2022-03-20 15:15:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:15:50,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493303995] [2022-03-20 15:15:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:15:50,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:15:50,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:15:50,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780654560] [2022-03-20 15:15:50,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:15:50,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:50,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:15:50,959 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:15:50,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 15:15:51,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:15:51,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:15:51,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 15:15:51,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:15:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-20 15:15:51,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:15:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-20 15:15:55,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:15:55,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493303995] [2022-03-20 15:15:55,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:15:55,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780654560] [2022-03-20 15:15:55,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780654560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:15:55,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:15:55,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2022-03-20 15:15:55,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:15:55,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [786637522] [2022-03-20 15:15:55,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [786637522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:15:55,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:15:55,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:15:55,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751887063] [2022-03-20 15:15:55,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:15:55,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:15:55,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:15:55,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-03-20 15:15:55,231 INFO L87 Difference]: Start difference. First operand 596 states and 831 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 15:15:57,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:15:57,231 INFO L93 Difference]: Finished difference Result 665 states and 919 transitions. [2022-03-20 15:15:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 15:15:57,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 116 [2022-03-20 15:15:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:15:57,234 INFO L225 Difference]: With dead ends: 665 [2022-03-20 15:15:57,234 INFO L226 Difference]: Without dead ends: 662 [2022-03-20 15:15:57,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 15:15:57,235 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 78 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:15:57,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 769 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 15:15:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-20 15:15:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 600. [2022-03-20 15:15:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 346 states have (on average 1.1965317919075145) internal successors, (414), 347 states have internal predecessors, (414), 211 states have call successors, (211), 43 states have call predecessors, (211), 42 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2022-03-20 15:15:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 834 transitions. [2022-03-20 15:15:57,368 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 834 transitions. Word has length 116 [2022-03-20 15:15:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:15:57,368 INFO L478 AbstractCegarLoop]: Abstraction has 600 states and 834 transitions. [2022-03-20 15:15:57,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 15:15:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 834 transitions. [2022-03-20 15:15:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 15:15:57,369 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:15:57,369 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:15:57,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 15:15:57,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:57,586 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:15:57,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:15:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 13 times [2022-03-20 15:15:57,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:57,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [250940036] [2022-03-20 15:15:57,587 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:15:57,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 14 times [2022-03-20 15:15:57,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:15:57,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657172537] [2022-03-20 15:15:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:15:57,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:15:57,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:15:57,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934930699] [2022-03-20 15:15:57,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:15:57,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:57,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:15:57,594 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:15:57,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 15:15:57,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:15:57,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:15:57,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 15:15:57,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:15:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 95 proven. 63 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 15:15:58,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:00,930 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:00,932 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:05,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:05,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657172537] [2022-03-20 15:16:05,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:05,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934930699] [2022-03-20 15:16:05,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934930699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:16:05,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:16:05,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 15:16:05,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:05,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [250940036] [2022-03-20 15:16:05,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [250940036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:05,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:05,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:16:05,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466629622] [2022-03-20 15:16:05,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:05,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:16:05,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:05,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:16:05,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=702, Unknown=1, NotChecked=0, Total=812 [2022-03-20 15:16:05,903 INFO L87 Difference]: Start difference. First operand 600 states and 834 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:16:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:09,199 INFO L93 Difference]: Finished difference Result 691 states and 960 transitions. [2022-03-20 15:16:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 15:16:09,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 116 [2022-03-20 15:16:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:09,203 INFO L225 Difference]: With dead ends: 691 [2022-03-20 15:16:09,203 INFO L226 Difference]: Without dead ends: 688 [2022-03-20 15:16:09,203 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=189, Invalid=1216, Unknown=1, NotChecked=0, Total=1406 [2022-03-20 15:16:09,204 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 71 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:09,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 836 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 15:16:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-20 15:16:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 665. [2022-03-20 15:16:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 380 states have (on average 1.2026315789473685) internal successors, (457), 381 states have internal predecessors, (457), 239 states have call successors, (239), 46 states have call predecessors, (239), 45 states have return successors, (237), 237 states have call predecessors, (237), 237 states have call successors, (237) [2022-03-20 15:16:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 933 transitions. [2022-03-20 15:16:09,356 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 933 transitions. Word has length 116 [2022-03-20 15:16:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:09,356 INFO L478 AbstractCegarLoop]: Abstraction has 665 states and 933 transitions. [2022-03-20 15:16:09,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:16:09,356 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 933 transitions. [2022-03-20 15:16:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 15:16:09,357 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:09,357 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 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] [2022-03-20 15:16:09,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:09,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:09,558 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:09,558 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 15 times [2022-03-20 15:16:09,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:09,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [397209981] [2022-03-20 15:16:09,559 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:09,559 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 16 times [2022-03-20 15:16:09,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:09,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206008486] [2022-03-20 15:16:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:09,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:09,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:09,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875115370] [2022-03-20 15:16:09,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:09,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:09,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:09,566 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:09,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 15:16:09,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:09,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:09,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 118 conjunts are in the unsatisfiable core [2022-03-20 15:16:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 113 proven. 70 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-20 15:16:11,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 15:16:13,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206008486] [2022-03-20 15:16:13,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875115370] [2022-03-20 15:16:13,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875115370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:13,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:13,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 35 [2022-03-20 15:16:13,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:13,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [397209981] [2022-03-20 15:16:13,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [397209981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:13,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:13,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 15:16:13,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662376127] [2022-03-20 15:16:13,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:13,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 15:16:13,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 15:16:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 15:16:13,490 INFO L87 Difference]: Start difference. First operand 665 states and 933 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:16:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:15,486 INFO L93 Difference]: Finished difference Result 773 states and 1073 transitions. [2022-03-20 15:16:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 15:16:15,486 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 121 [2022-03-20 15:16:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:15,489 INFO L225 Difference]: With dead ends: 773 [2022-03-20 15:16:15,489 INFO L226 Difference]: Without dead ends: 770 [2022-03-20 15:16:15,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 204 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 15:16:15,490 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 107 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:15,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1021 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 15:16:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-20 15:16:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 699. [2022-03-20 15:16:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 398 states have (on average 1.2035175879396984) internal successors, (479), 399 states have internal predecessors, (479), 251 states have call successors, (251), 50 states have call predecessors, (251), 49 states have return successors, (249), 249 states have call predecessors, (249), 249 states have call successors, (249) [2022-03-20 15:16:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 979 transitions. [2022-03-20 15:16:15,662 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 979 transitions. Word has length 121 [2022-03-20 15:16:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:15,663 INFO L478 AbstractCegarLoop]: Abstraction has 699 states and 979 transitions. [2022-03-20 15:16:15,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:16:15,663 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 979 transitions. [2022-03-20 15:16:15,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 15:16:15,664 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:15,664 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 15:16:15,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:15,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 15:16:15,876 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:15,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 3 times [2022-03-20 15:16:15,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:15,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [880061641] [2022-03-20 15:16:15,877 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 4 times [2022-03-20 15:16:15,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:15,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882711902] [2022-03-20 15:16:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:15,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:15,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:15,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380164007] [2022-03-20 15:16:15,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:15,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:15,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:15,885 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:15,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 15:16:15,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:15,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:15,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 15:16:15,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:16,903 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 76 proven. 113 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-20 15:16:17,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 110 proven. 27 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-03-20 15:16:18,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:18,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882711902] [2022-03-20 15:16:18,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:18,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380164007] [2022-03-20 15:16:18,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380164007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:18,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:18,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 29 [2022-03-20 15:16:18,402 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:18,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [880061641] [2022-03-20 15:16:18,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [880061641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:18,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:18,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 15:16:18,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974321564] [2022-03-20 15:16:18,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:18,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 15:16:18,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:18,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 15:16:18,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-03-20 15:16:18,404 INFO L87 Difference]: Start difference. First operand 699 states and 979 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 15:16:19,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:19,696 INFO L93 Difference]: Finished difference Result 818 states and 1133 transitions. [2022-03-20 15:16:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 15:16:19,697 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) Word has length 124 [2022-03-20 15:16:19,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:19,700 INFO L225 Difference]: With dead ends: 818 [2022-03-20 15:16:19,700 INFO L226 Difference]: Without dead ends: 816 [2022-03-20 15:16:19,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 15:16:19,701 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 70 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:19,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 809 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 15:16:19,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-03-20 15:16:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 751. [2022-03-20 15:16:19,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 429 states have (on average 1.2004662004662006) internal successors, (515), 430 states have internal predecessors, (515), 267 states have call successors, (267), 55 states have call predecessors, (267), 54 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2022-03-20 15:16:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1047 transitions. [2022-03-20 15:16:19,882 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1047 transitions. Word has length 124 [2022-03-20 15:16:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:19,882 INFO L478 AbstractCegarLoop]: Abstraction has 751 states and 1047 transitions. [2022-03-20 15:16:19,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 15:16:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1047 transitions. [2022-03-20 15:16:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 15:16:19,883 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:19,883 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 15:16:19,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:20,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 15:16:20,103 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:20,104 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 5 times [2022-03-20 15:16:20,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:20,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1073532722] [2022-03-20 15:16:20,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:20,104 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 6 times [2022-03-20 15:16:20,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:20,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441382303] [2022-03-20 15:16:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:20,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:20,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:20,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564785772] [2022-03-20 15:16:20,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:20,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:20,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:20,111 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:20,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 15:16:20,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:16:20,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:20,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 15:16:20,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 95 proven. 62 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-03-20 15:16:20,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:21,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441382303] [2022-03-20 15:16:21,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564785772] [2022-03-20 15:16:21,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564785772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:16:21,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:16:21,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 15:16:21,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1073532722] [2022-03-20 15:16:21,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1073532722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:21,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:21,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 15:16:21,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448161744] [2022-03-20 15:16:21,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:21,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 15:16:21,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 15:16:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:16:21,717 INFO L87 Difference]: Start difference. First operand 751 states and 1047 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 15:16:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:22,541 INFO L93 Difference]: Finished difference Result 792 states and 1089 transitions. [2022-03-20 15:16:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:16:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 129 [2022-03-20 15:16:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:22,544 INFO L225 Difference]: With dead ends: 792 [2022-03-20 15:16:22,544 INFO L226 Difference]: Without dead ends: 790 [2022-03-20 15:16:22,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:16:22,545 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:22,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 242 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 15:16:22,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-03-20 15:16:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 764. [2022-03-20 15:16:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 438 states have (on average 1.1963470319634704) internal successors, (524), 440 states have internal predecessors, (524), 269 states have call successors, (269), 57 states have call predecessors, (269), 56 states have return successors, (267), 266 states have call predecessors, (267), 267 states have call successors, (267) [2022-03-20 15:16:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1060 transitions. [2022-03-20 15:16:22,734 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1060 transitions. Word has length 129 [2022-03-20 15:16:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:22,734 INFO L478 AbstractCegarLoop]: Abstraction has 764 states and 1060 transitions. [2022-03-20 15:16:22,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 15:16:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1060 transitions. [2022-03-20 15:16:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 15:16:22,736 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:22,736 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-20 15:16:22,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:22,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 15:16:22,936 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:22,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 17 times [2022-03-20 15:16:22,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:22,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [594269906] [2022-03-20 15:16:22,937 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:22,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 18 times [2022-03-20 15:16:22,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:22,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541673731] [2022-03-20 15:16:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:22,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:22,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:22,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740807004] [2022-03-20 15:16:22,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:16:22,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:22,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:22,946 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:22,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 15:16:23,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:16:23,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:23,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 15:16:23,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-03-20 15:16:23,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-20 15:16:23,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:23,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541673731] [2022-03-20 15:16:23,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:23,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740807004] [2022-03-20 15:16:23,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740807004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:23,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:23,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 15:16:23,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:23,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [594269906] [2022-03-20 15:16:23,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [594269906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:23,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:23,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 15:16:23,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213052808] [2022-03-20 15:16:23,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:23,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 15:16:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 15:16:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:16:23,394 INFO L87 Difference]: Start difference. First operand 764 states and 1060 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-20 15:16:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:23,795 INFO L93 Difference]: Finished difference Result 1341 states and 1936 transitions. [2022-03-20 15:16:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:16:23,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 133 [2022-03-20 15:16:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:23,799 INFO L225 Difference]: With dead ends: 1341 [2022-03-20 15:16:23,799 INFO L226 Difference]: Without dead ends: 991 [2022-03-20 15:16:23,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:16:23,801 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:23,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 291 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:16:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-03-20 15:16:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 873. [2022-03-20 15:16:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 484 states have (on average 1.2148760330578512) internal successors, (588), 499 states have internal predecessors, (588), 336 states have call successors, (336), 53 states have call predecessors, (336), 52 states have return successors, (334), 320 states have call predecessors, (334), 334 states have call successors, (334) [2022-03-20 15:16:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1258 transitions. [2022-03-20 15:16:24,058 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1258 transitions. Word has length 133 [2022-03-20 15:16:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:24,059 INFO L478 AbstractCegarLoop]: Abstraction has 873 states and 1258 transitions. [2022-03-20 15:16:24,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-20 15:16:24,059 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1258 transitions. [2022-03-20 15:16:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 15:16:24,060 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:24,060 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-20 15:16:24,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:24,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 15:16:24,275 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 19 times [2022-03-20 15:16:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:24,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1785010572] [2022-03-20 15:16:24,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 20 times [2022-03-20 15:16:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:24,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159858414] [2022-03-20 15:16:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:24,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:24,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:24,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277107930] [2022-03-20 15:16:24,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:24,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:24,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:24,284 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:24,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 15:16:24,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:24,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:24,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 15:16:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 133 proven. 88 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 15:16:25,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 134 proven. 60 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 15:16:27,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:27,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159858414] [2022-03-20 15:16:27,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:27,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277107930] [2022-03-20 15:16:27,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277107930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:27,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:27,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-03-20 15:16:27,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:27,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1785010572] [2022-03-20 15:16:27,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1785010572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:27,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:27,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:16:27,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512506697] [2022-03-20 15:16:27,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:27,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:16:27,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:27,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:16:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-03-20 15:16:27,665 INFO L87 Difference]: Start difference. First operand 873 states and 1258 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 15:16:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:28,499 INFO L93 Difference]: Finished difference Result 1004 states and 1446 transitions. [2022-03-20 15:16:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:16:28,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-03-20 15:16:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:28,504 INFO L225 Difference]: With dead ends: 1004 [2022-03-20 15:16:28,504 INFO L226 Difference]: Without dead ends: 1001 [2022-03-20 15:16:28,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 15:16:28,505 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 51 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:28,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 586 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 15:16:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-03-20 15:16:28,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 912. [2022-03-20 15:16:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 504 states have (on average 1.2162698412698412) internal successors, (613), 519 states have internal predecessors, (613), 352 states have call successors, (352), 56 states have call predecessors, (352), 55 states have return successors, (350), 336 states have call predecessors, (350), 350 states have call successors, (350) [2022-03-20 15:16:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1315 transitions. [2022-03-20 15:16:28,776 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1315 transitions. Word has length 133 [2022-03-20 15:16:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:28,777 INFO L478 AbstractCegarLoop]: Abstraction has 912 states and 1315 transitions. [2022-03-20 15:16:28,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 15:16:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1315 transitions. [2022-03-20 15:16:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 15:16:28,778 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:28,778 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:16:28,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:28,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 15:16:28,991 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:28,992 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 21 times [2022-03-20 15:16:28,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:28,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [300497989] [2022-03-20 15:16:28,992 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:28,992 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 22 times [2022-03-20 15:16:28,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:28,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179060383] [2022-03-20 15:16:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:28,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:29,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:29,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298217120] [2022-03-20 15:16:29,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:29,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:29,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:29,003 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:29,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 15:16:29,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:29,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:29,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 15:16:29,055 INFO L286 TraceCheckSpWp]: Computing forward predicates...