/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/bresenham-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:53:28,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:53:28,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:53:28,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 13:53:28,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:53:28,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:53:28,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:53:28,793 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 13:53:28,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:53:28,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:53:28,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:53:28,799 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:53:28,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:53:28,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:53:28,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:53:28,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:53:28,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:53:28,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:53:28,800 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:53:28,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:53:28,800 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:53:28,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:53:28,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:53:28,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:53:28,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:53:28,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:53:28,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:53:28,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:53:28,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:53:28,801 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:53:28,801 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:53:28,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:53:28,802 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:53:28,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:53:29,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:53:29,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:53:29,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:53:29,021 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:53:29,021 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:53:29,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound100.c [2022-03-20 13:53:29,077 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56bd48e4d/06242558d5f34f98bf0854f968904d9f/FLAG041cfa3be [2022-03-20 13:53:29,409 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:53:29,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound100.c [2022-03-20 13:53:29,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56bd48e4d/06242558d5f34f98bf0854f968904d9f/FLAG041cfa3be [2022-03-20 13:53:29,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56bd48e4d/06242558d5f34f98bf0854f968904d9f [2022-03-20 13:53:29,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:53:29,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:53:29,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:53:29,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:53:29,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:53:29,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:53:29" (1/1) ... [2022-03-20 13:53:29,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da9b465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:53:29, skipping insertion in model container [2022-03-20 13:53:29,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:53:29" (1/1) ... [2022-03-20 13:53:29,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:53:29,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:53:30,023 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/bresenham-ll_unwindbound100.c[597,610] [2022-03-20 13:53:30,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:53:30,040 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:53:30,047 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/bresenham-ll_unwindbound100.c[597,610] [2022-03-20 13:53:30,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:53:30,058 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:53:30,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:53:30 WrapperNode [2022-03-20 13:53:30,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:53:30,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:53:30,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:53:30,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:53:30,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:53:30" (1/1) ... [2022-03-20 13:53:30,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:53:30" (1/1) ... [2022-03-20 13:53:30,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:53:30" (1/1) ... [2022-03-20 13:53:30,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:53:30" (1/1) ... [2022-03-20 13:53:30,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:53:30" (1/1) ... [2022-03-20 13:53:30,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:53:30" (1/1) ... [2022-03-20 13:53:30,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:53:30" (1/1) ... [2022-03-20 13:53:30,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:53:30,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:53:30,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:53:30,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:53:30,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:53:30" (1/1) ... [2022-03-20 13:53:30,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:53:30,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:30,100 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 13:53:30,101 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 13:53:30,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:53:30,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:53:30,127 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:53:30,127 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 13:53:30,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:53:30,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:53:30,128 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:53:30,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:53:30,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:53:30,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:53:30,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 13:53:30,128 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 13:53:30,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:53:30,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:53:30,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:53:30,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:53:30,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:53:30,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:53:30,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:53:30,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:53:30,169 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:53:30,170 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:53:30,349 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:53:30,353 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:53:30,353 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 13:53:30,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:53:30 BoogieIcfgContainer [2022-03-20 13:53:30,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:53:30,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:53:30,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:53:30,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:53:30,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:53:29" (1/3) ... [2022-03-20 13:53:30,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7fc54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:53:30, skipping insertion in model container [2022-03-20 13:53:30,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:53:30" (2/3) ... [2022-03-20 13:53:30,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7fc54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:53:30, skipping insertion in model container [2022-03-20 13:53:30,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:53:30" (3/3) ... [2022-03-20 13:53:30,371 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound100.c [2022-03-20 13:53:30,374 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:53:30,374 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:53:30,413 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:53:30,418 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 13:53:30,419 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:53:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:53:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 13:53:30,432 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:30,432 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:30,432 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:30,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2022-03-20 13:53:30,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:30,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1316862144] [2022-03-20 13:53:30,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:53:30,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 2 times [2022-03-20 13:53:30,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:30,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148205342] [2022-03-20 13:53:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:30,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:53:30,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:53:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:53:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:53:30,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:30,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148205342] [2022-03-20 13:53:30,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148205342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:30,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:30,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:53:30,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:30,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1316862144] [2022-03-20 13:53:30,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1316862144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:30,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:30,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:53:30,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694576718] [2022-03-20 13:53:30,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:30,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 13:53:30,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:30,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 13:53:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:53:30,610 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:53:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:30,678 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-03-20 13:53:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 13:53:30,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 13:53:30,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:30,687 INFO L225 Difference]: With dead ends: 45 [2022-03-20 13:53:30,687 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 13:53:30,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 13:53:30,693 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:30,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:53:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 13:53:30,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-20 13:53:30,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:53:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-20 13:53:30,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-03-20 13:53:30,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:30,729 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-20 13:53:30,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:53:30,729 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-20 13:53:30,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 13:53:30,730 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:30,730 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:30,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:53:30,731 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2022-03-20 13:53:30,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:30,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1802929018] [2022-03-20 13:53:30,736 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:53:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 2 times [2022-03-20 13:53:30,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:30,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950567075] [2022-03-20 13:53:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:30,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:30,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:30,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124847582] [2022-03-20 13:53:30,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:53:30,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:30,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:30,776 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 13:53:30,778 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 13:53:30,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 13:53:30,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:30,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 13:53:30,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:53:30,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:53:30,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:30,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950567075] [2022-03-20 13:53:30,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:30,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124847582] [2022-03-20 13:53:30,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124847582] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:30,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:30,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:53:30,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:30,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1802929018] [2022-03-20 13:53:30,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1802929018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:30,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:30,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:53:30,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789513604] [2022-03-20 13:53:30,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:30,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:53:30,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:30,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:53:30,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:53:30,969 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:53:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:31,022 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-20 13:53:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:53:31,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 13:53:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:31,024 INFO L225 Difference]: With dead ends: 34 [2022-03-20 13:53:31,024 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 13:53:31,025 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 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 13:53:31,025 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:31,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:53:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 13:53:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-20 13:53:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-20 13:53:31,032 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-03-20 13:53:31,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:31,032 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-20 13:53:31,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:53:31,032 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-20 13:53:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 13:53:31,033 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:31,033 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:31,053 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 13:53:31,250 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 13:53:31,251 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 1 times [2022-03-20 13:53:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:31,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159789954] [2022-03-20 13:53:31,276 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:53:31,276 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:53:31,276 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:53:31,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 2 times [2022-03-20 13:53:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:31,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641376665] [2022-03-20 13:53:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:31,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:31,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:31,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328235000] [2022-03-20 13:53:31,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:53:31,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:31,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:31,297 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 13:53:31,298 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 13:53:31,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:53:31,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:31,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 13:53:31,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:53:31,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 13:53:31,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:31,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641376665] [2022-03-20 13:53:31,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:31,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328235000] [2022-03-20 13:53:31,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328235000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:31,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:31,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-20 13:53:31,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:31,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159789954] [2022-03-20 13:53:31,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159789954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:31,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:31,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:53:31,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143524756] [2022-03-20 13:53:31,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:31,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:53:31,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:31,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:53:31,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:53:31,613 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:53:31,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:31,706 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-03-20 13:53:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:53:31,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-03-20 13:53:31,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:31,707 INFO L225 Difference]: With dead ends: 44 [2022-03-20 13:53:31,707 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 13:53:31,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:53:31,709 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:31,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 121 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:53:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 13:53:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-03-20 13:53:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:53:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-03-20 13:53:31,714 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2022-03-20 13:53:31,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:31,715 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-03-20 13:53:31,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:53:31,715 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-03-20 13:53:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 13:53:31,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:31,715 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:31,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 13:53:31,931 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 13:53:31,932 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash 794559142, now seen corresponding path program 1 times [2022-03-20 13:53:31,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:31,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1921109426] [2022-03-20 13:53:31,935 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:53:31,936 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:53:31,936 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:53:31,936 INFO L85 PathProgramCache]: Analyzing trace with hash 794559142, now seen corresponding path program 2 times [2022-03-20 13:53:31,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:31,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510870056] [2022-03-20 13:53:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:31,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:31,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:31,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939181312] [2022-03-20 13:53:31,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:53:31,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:31,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:31,944 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 13:53:31,945 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 13:53:31,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:53:31,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:31,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 13:53:31,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:53:32,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 13:53:32,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510870056] [2022-03-20 13:53:32,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939181312] [2022-03-20 13:53:32,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939181312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:32,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:32,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-20 13:53:32,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:32,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1921109426] [2022-03-20 13:53:32,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1921109426] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:32,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:32,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:53:32,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534549079] [2022-03-20 13:53:32,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:32,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:53:32,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:53:32,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:53:32,186 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:53:32,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:32,260 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-03-20 13:53:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:53:32,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-03-20 13:53:32,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:32,262 INFO L225 Difference]: With dead ends: 53 [2022-03-20 13:53:32,262 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 13:53:32,262 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:53:32,263 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:32,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 126 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:53:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 13:53:32,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-03-20 13:53:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:53:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-20 13:53:32,269 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2022-03-20 13:53:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:32,269 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-20 13:53:32,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:53:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-20 13:53:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 13:53:32,270 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:32,270 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:32,288 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 13:53:32,486 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 13:53:32,486 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:32,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:32,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 1 times [2022-03-20 13:53:32,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:32,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [922119825] [2022-03-20 13:53:32,490 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:53:32,490 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:53:32,490 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:53:32,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 2 times [2022-03-20 13:53:32,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:32,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244368304] [2022-03-20 13:53:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:32,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:32,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:32,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052661378] [2022-03-20 13:53:32,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:53:32,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:32,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:32,509 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 13:53:32,516 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 13:53:32,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:53:32,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:32,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 13:53:32,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:53:32,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:53:32,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:32,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244368304] [2022-03-20 13:53:32,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:32,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052661378] [2022-03-20 13:53:32,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052661378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:32,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:32,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 13:53:32,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:32,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [922119825] [2022-03-20 13:53:32,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [922119825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:32,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:32,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:53:32,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209415531] [2022-03-20 13:53:32,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:32,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:53:32,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:53:32,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:53:32,664 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:53:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:32,685 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2022-03-20 13:53:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:53:32,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-03-20 13:53:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:32,687 INFO L225 Difference]: With dead ends: 54 [2022-03-20 13:53:32,687 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 13:53:32,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:53:32,688 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:32,688 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:53:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 13:53:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 13:53:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:53:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-03-20 13:53:32,695 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2022-03-20 13:53:32,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:32,695 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-03-20 13:53:32,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:53:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-03-20 13:53:32,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 13:53:32,696 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:32,696 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:32,713 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 13:53:32,909 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 13:53:32,909 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:32,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 1 times [2022-03-20 13:53:32,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:32,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [714663714] [2022-03-20 13:53:32,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:53:32,912 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:53:32,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:53:32,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 2 times [2022-03-20 13:53:32,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:32,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428416946] [2022-03-20 13:53:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:32,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:32,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:32,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727177723] [2022-03-20 13:53:32,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:53:32,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:32,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:32,921 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 13:53:32,922 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 13:53:32,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:53:32,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:32,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 13:53:32,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:53:33,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:53:33,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:33,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428416946] [2022-03-20 13:53:33,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727177723] [2022-03-20 13:53:33,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727177723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:33,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:33,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-20 13:53:33,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [714663714] [2022-03-20 13:53:33,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [714663714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:33,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:33,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:53:33,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209258705] [2022-03-20 13:53:33,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:33,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:53:33,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:33,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:53:33,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:53:33,524 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:33,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:33,716 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-03-20 13:53:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 13:53:33,716 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-03-20 13:53:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:33,717 INFO L225 Difference]: With dead ends: 57 [2022-03-20 13:53:33,717 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 13:53:33,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:53:33,718 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:33,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 158 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:53:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 13:53:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2022-03-20 13:53:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:53:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-03-20 13:53:33,724 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2022-03-20 13:53:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:33,724 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-03-20 13:53:33,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-03-20 13:53:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 13:53:33,724 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:33,724 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:33,744 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 13:53:33,925 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 13:53:33,925 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:33,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:33,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1603460440, now seen corresponding path program 3 times [2022-03-20 13:53:33,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:33,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [307150442] [2022-03-20 13:53:33,928 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:53:33,929 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:53:33,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:53:33,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1603460440, now seen corresponding path program 4 times [2022-03-20 13:53:33,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:33,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668494883] [2022-03-20 13:53:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:33,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:33,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:33,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367377955] [2022-03-20 13:53:33,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:53:33,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:33,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:33,937 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 13:53:33,938 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 13:53:33,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:53:33,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:33,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 13:53:33,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:53:34,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:53:34,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:34,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668494883] [2022-03-20 13:53:34,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:34,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367377955] [2022-03-20 13:53:34,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367377955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:34,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:34,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 13:53:34,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:34,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [307150442] [2022-03-20 13:53:34,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [307150442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:34,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:34,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:53:34,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119220980] [2022-03-20 13:53:34,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:34,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:53:34,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:53:34,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:53:34,393 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:34,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:34,543 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-03-20 13:53:34,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:53:34,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-20 13:53:34,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:34,546 INFO L225 Difference]: With dead ends: 63 [2022-03-20 13:53:34,546 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 13:53:34,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:53:34,547 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:34,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 156 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:53:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 13:53:34,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2022-03-20 13:53:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:53:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-03-20 13:53:34,566 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 32 [2022-03-20 13:53:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:34,566 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-03-20 13:53:34,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-03-20 13:53:34,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 13:53:34,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:34,571 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:34,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 13:53:34,787 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 13:53:34,788 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:34,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1882160230, now seen corresponding path program 1 times [2022-03-20 13:53:34,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:34,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474573360] [2022-03-20 13:53:34,792 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:53:34,792 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:53:34,792 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:53:34,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1882160230, now seen corresponding path program 2 times [2022-03-20 13:53:34,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:34,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369434055] [2022-03-20 13:53:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:34,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:34,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:34,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782855276] [2022-03-20 13:53:34,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:53:34,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:34,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:34,805 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 13:53:34,806 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 13:53:34,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:53:34,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:34,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 13:53:34,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:35,158 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:53:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:53:35,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:53:35,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369434055] [2022-03-20 13:53:35,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782855276] [2022-03-20 13:53:35,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782855276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:35,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:35,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2022-03-20 13:53:35,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474573360] [2022-03-20 13:53:35,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474573360] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:35,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:35,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:53:35,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456591611] [2022-03-20 13:53:35,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:35,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:53:35,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:53:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:53:35,677 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:35,915 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2022-03-20 13:53:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:53:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-20 13:53:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:35,916 INFO L225 Difference]: With dead ends: 74 [2022-03-20 13:53:35,916 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 13:53:35,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:53:35,917 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:35,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 172 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:53:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 13:53:35,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-03-20 13:53:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 states have internal predecessors, (50), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 13:53:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-03-20 13:53:35,924 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 32 [2022-03-20 13:53:35,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:35,924 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-03-20 13:53:35,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:35,924 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-03-20 13:53:35,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 13:53:35,925 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:35,925 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:35,941 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 13:53:36,141 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 13:53:36,141 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:36,142 INFO L85 PathProgramCache]: Analyzing trace with hash 697362150, now seen corresponding path program 3 times [2022-03-20 13:53:36,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:36,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [657839465] [2022-03-20 13:53:36,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:53:36,146 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:53:36,146 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:53:36,146 INFO L85 PathProgramCache]: Analyzing trace with hash 697362150, now seen corresponding path program 4 times [2022-03-20 13:53:36,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:36,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3803787] [2022-03-20 13:53:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:36,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:36,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:36,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515763526] [2022-03-20 13:53:36,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:53:36,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:36,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:36,152 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 13:53:36,153 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 13:53:36,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:53:36,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 13:53:36,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:36,480 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:53:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:53:36,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:53:37,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:37,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3803787] [2022-03-20 13:53:37,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:37,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515763526] [2022-03-20 13:53:37,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515763526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:37,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:37,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2022-03-20 13:53:37,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:37,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [657839465] [2022-03-20 13:53:37,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [657839465] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:37,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:37,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:53:37,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608174593] [2022-03-20 13:53:37,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:37,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:53:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:37,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:53:37,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:53:37,224 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:37,549 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-03-20 13:53:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:53:37,550 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-20 13:53:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:37,550 INFO L225 Difference]: With dead ends: 94 [2022-03-20 13:53:37,550 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 13:53:37,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:53:37,551 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:37,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 205 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:53:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 13:53:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-03-20 13:53:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 13:53:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-03-20 13:53:37,561 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 32 [2022-03-20 13:53:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:37,561 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-03-20 13:53:37,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-03-20 13:53:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 13:53:37,562 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:37,562 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:37,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 13:53:37,777 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 13:53:37,778 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:37,778 INFO L85 PathProgramCache]: Analyzing trace with hash -111984476, now seen corresponding path program 3 times [2022-03-20 13:53:37,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:37,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [706939474] [2022-03-20 13:53:37,781 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:53:37,781 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:53:37,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:53:37,781 INFO L85 PathProgramCache]: Analyzing trace with hash -111984476, now seen corresponding path program 4 times [2022-03-20 13:53:37,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:37,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762274614] [2022-03-20 13:53:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:37,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:37,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:37,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592197798] [2022-03-20 13:53:37,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:53:37,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:37,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:37,796 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 13:53:37,797 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 13:53:37,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:53:37,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:37,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 13:53:37,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:53:38,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:53:38,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:38,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762274614] [2022-03-20 13:53:38,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:38,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592197798] [2022-03-20 13:53:38,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592197798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:38,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:38,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-03-20 13:53:38,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:38,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [706939474] [2022-03-20 13:53:38,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [706939474] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:38,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:38,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:53:38,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678431708] [2022-03-20 13:53:38,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:38,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:53:38,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:38,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:53:38,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:53:38,411 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:38,568 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-03-20 13:53:38,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:53:38,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-20 13:53:38,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:38,569 INFO L225 Difference]: With dead ends: 93 [2022-03-20 13:53:38,569 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 13:53:38,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:53:38,570 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:38,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 201 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:53:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 13:53:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-03-20 13:53:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 67 states have internal predecessors, (75), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 13:53:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2022-03-20 13:53:38,583 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 32 [2022-03-20 13:53:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:38,583 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2022-03-20 13:53:38,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2022-03-20 13:53:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 13:53:38,584 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:38,584 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:38,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 13:53:38,799 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 13:53:38,799 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1857919347, now seen corresponding path program 1 times [2022-03-20 13:53:38,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:38,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831598200] [2022-03-20 13:53:38,803 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:53:38,803 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:53:38,803 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:53:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1857919347, now seen corresponding path program 2 times [2022-03-20 13:53:38,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:38,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205219154] [2022-03-20 13:53:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:38,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:38,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:38,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883453528] [2022-03-20 13:53:38,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:53:38,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:38,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:38,811 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 13:53:38,816 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 13:53:38,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:53:38,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:38,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:53:38,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:53:38,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:53:39,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:39,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205219154] [2022-03-20 13:53:39,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:39,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883453528] [2022-03-20 13:53:39,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883453528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:39,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:39,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 13:53:39,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:39,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831598200] [2022-03-20 13:53:39,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831598200] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:39,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:39,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:53:39,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246869140] [2022-03-20 13:53:39,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:39,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:53:39,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:53:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:53:39,027 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:39,059 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-03-20 13:53:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:53:39,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-20 13:53:39,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:39,060 INFO L225 Difference]: With dead ends: 94 [2022-03-20 13:53:39,060 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 13:53:39,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:53:39,061 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:39,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 91 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:53:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 13:53:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-20 13:53:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 67 states have internal predecessors, (72), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 13:53:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2022-03-20 13:53:39,069 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 33 [2022-03-20 13:53:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:39,069 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2022-03-20 13:53:39,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2022-03-20 13:53:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 13:53:39,070 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:39,070 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:39,107 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 13:53:39,286 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 13:53:39,286 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:39,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1589915704, now seen corresponding path program 3 times [2022-03-20 13:53:39,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:39,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2079596661] [2022-03-20 13:53:39,289 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:53:39,289 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:53:39,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:53:39,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1589915704, now seen corresponding path program 4 times [2022-03-20 13:53:39,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:39,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370833217] [2022-03-20 13:53:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:39,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:39,294 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:39,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546276114] [2022-03-20 13:53:39,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:53:39,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:39,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:39,295 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 13:53:39,296 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 13:53:39,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:53:39,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:39,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 13:53:39,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:53:39,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:53:39,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:39,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370833217] [2022-03-20 13:53:39,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:39,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546276114] [2022-03-20 13:53:39,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546276114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:39,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:39,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-20 13:53:39,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:39,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2079596661] [2022-03-20 13:53:39,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2079596661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:39,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:39,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:53:39,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120035821] [2022-03-20 13:53:39,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:39,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:53:39,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:39,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:53:39,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:53:39,868 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:53:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:40,103 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2022-03-20 13:53:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:53:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2022-03-20 13:53:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:40,104 INFO L225 Difference]: With dead ends: 97 [2022-03-20 13:53:40,104 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 13:53:40,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-20 13:53:40,104 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:40,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 209 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:53:40,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 13:53:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2022-03-20 13:53:40,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 states have internal predecessors, (66), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 13:53:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-03-20 13:53:40,123 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 39 [2022-03-20 13:53:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:40,123 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-03-20 13:53:40,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:53:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-03-20 13:53:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 13:53:40,123 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:40,123 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:53:40,140 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 13:53:40,340 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 13:53:40,340 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash -108827544, now seen corresponding path program 5 times [2022-03-20 13:53:40,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:40,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [698294044] [2022-03-20 13:53:40,342 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:53:40,343 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:53:40,343 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:53:40,343 INFO L85 PathProgramCache]: Analyzing trace with hash -108827544, now seen corresponding path program 6 times [2022-03-20 13:53:40,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:40,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711821747] [2022-03-20 13:53:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:40,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:40,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:40,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039453284] [2022-03-20 13:53:40,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:53:40,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:40,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:40,349 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 13:53:40,350 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 13:53:40,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 13:53:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 13:53:40,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:40,497 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:53:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 13:53:40,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 13:53:41,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:41,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711821747] [2022-03-20 13:53:41,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:41,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039453284] [2022-03-20 13:53:41,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039453284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:41,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:41,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-03-20 13:53:41,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:41,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [698294044] [2022-03-20 13:53:41,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [698294044] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:41,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:41,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:53:41,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849012694] [2022-03-20 13:53:41,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:41,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:53:41,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:41,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:53:41,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:53:41,081 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:53:57,285 WARN L232 SmtUtils]: Spent 16.18s on a formula simplification. DAG size of input: 45 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:54:01,390 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 13:54:03,454 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 13:54:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:54:07,547 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-03-20 13:54:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:54:07,548 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-03-20 13:54:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:54:07,548 INFO L225 Difference]: With dead ends: 103 [2022-03-20 13:54:07,548 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 13:54:07,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=78, Invalid=340, Unknown=2, NotChecked=0, Total=420 [2022-03-20 13:54:07,549 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:54:07,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 89 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 13:54:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 13:54:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2022-03-20 13:54:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 13:54:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-03-20 13:54:07,559 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 42 [2022-03-20 13:54:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:54:07,559 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-03-20 13:54:07,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:54:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-03-20 13:54:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 13:54:07,560 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:54:07,560 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:54:07,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 13:54:07,773 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 13:54:07,773 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:54:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:54:07,773 INFO L85 PathProgramCache]: Analyzing trace with hash -918174170, now seen corresponding path program 5 times [2022-03-20 13:54:07,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:07,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306081337] [2022-03-20 13:54:07,776 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:54:07,776 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:54:07,776 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:54:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash -918174170, now seen corresponding path program 6 times [2022-03-20 13:54:07,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:54:07,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228950176] [2022-03-20 13:54:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:54:07,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:54:07,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:54:07,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421221530] [2022-03-20 13:54:07,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:54:07,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:54:07,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:54:07,782 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 13:54:07,783 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 13:54:07,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 13:54:07,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:54:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 13:54:07,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:54:07,935 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:54:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 13:54:08,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:54:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 13:54:08,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:54:08,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228950176] [2022-03-20 13:54:08,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:54:08,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421221530] [2022-03-20 13:54:08,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421221530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:54:08,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:54:08,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-03-20 13:54:08,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:54:08,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306081337] [2022-03-20 13:54:08,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306081337] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:54:08,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:54:08,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:54:08,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217809148] [2022-03-20 13:54:08,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:54:08,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:54:08,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:08,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:54:08,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-03-20 13:54:08,650 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:54:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:54:09,378 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-03-20 13:54:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:54:09,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-03-20 13:54:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:54:09,379 INFO L225 Difference]: With dead ends: 103 [2022-03-20 13:54:09,379 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 13:54:09,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:54:09,380 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:54:09,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 100 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:54:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 13:54:09,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2022-03-20 13:54:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 13:54:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2022-03-20 13:54:09,392 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 42 [2022-03-20 13:54:09,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:54:09,392 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2022-03-20 13:54:09,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:54:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2022-03-20 13:54:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 13:54:09,392 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:54:09,392 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:54:09,408 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 13:54:09,594 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 13:54:09,594 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:54:09,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:54:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1427647260, now seen corresponding path program 7 times [2022-03-20 13:54:09,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:09,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [150709746] [2022-03-20 13:54:09,612 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:54:09,612 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:54:09,612 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:54:09,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1427647260, now seen corresponding path program 8 times [2022-03-20 13:54:09,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:54:09,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392418504] [2022-03-20 13:54:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:54:09,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:54:09,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:54:09,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652213878] [2022-03-20 13:54:09,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:54:09,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:54:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:54:09,626 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 13:54:09,627 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 13:54:09,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:54:09,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:54:09,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 13:54:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:54:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:54:10,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:54:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 13:54:10,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:54:10,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392418504] [2022-03-20 13:54:10,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:54:10,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652213878] [2022-03-20 13:54:10,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652213878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:54:10,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:54:10,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-03-20 13:54:10,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:54:10,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [150709746] [2022-03-20 13:54:10,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [150709746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:54:10,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:54:10,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:54:10,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975733275] [2022-03-20 13:54:10,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:54:10,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:54:10,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:10,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:54:10,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:54:10,512 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:54:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:54:10,782 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2022-03-20 13:54:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:54:10,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2022-03-20 13:54:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:54:10,783 INFO L225 Difference]: With dead ends: 113 [2022-03-20 13:54:10,783 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 13:54:10,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-03-20 13:54:10,784 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:54:10,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 304 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:54:10,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 13:54:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-03-20 13:54:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 83 states have internal predecessors, (93), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 13:54:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2022-03-20 13:54:10,819 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 42 [2022-03-20 13:54:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:54:10,819 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2022-03-20 13:54:10,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:54:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2022-03-20 13:54:10,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 13:54:10,819 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:54:10,819 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:54:10,836 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 13:54:11,029 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 13:54:11,029 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:54:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:54:11,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1682521956, now seen corresponding path program 9 times [2022-03-20 13:54:11,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:11,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1877223023] [2022-03-20 13:54:11,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:54:11,032 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:54:11,032 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:54:11,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1682521956, now seen corresponding path program 10 times [2022-03-20 13:54:11,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:54:11,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369883512] [2022-03-20 13:54:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:54:11,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:54:11,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:54:11,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824451068] [2022-03-20 13:54:11,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:54:11,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:54:11,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:54:11,039 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 13:54:11,040 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 13:54:11,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:54:11,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:54:11,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 13:54:11,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:54:11,214 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:54:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 13:54:11,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:54:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 13:54:11,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:54:11,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369883512] [2022-03-20 13:54:11,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:54:11,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824451068] [2022-03-20 13:54:11,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824451068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:54:11,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:54:11,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-03-20 13:54:11,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:54:11,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1877223023] [2022-03-20 13:54:11,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1877223023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:54:11,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:54:11,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:54:11,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384177930] [2022-03-20 13:54:11,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:54:11,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:54:11,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:11,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:54:11,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:54:11,627 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:54:13,851 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 13:54:32,029 WARN L232 SmtUtils]: Spent 18.13s on a formula simplification. DAG size of input: 48 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:54:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:54:32,216 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2022-03-20 13:54:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:54:32,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2022-03-20 13:54:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:54:32,217 INFO L225 Difference]: With dead ends: 150 [2022-03-20 13:54:32,217 INFO L226 Difference]: Without dead ends: 148 [2022-03-20 13:54:32,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:54:32,218 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:54:32,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 234 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 324 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 13:54:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-20 13:54:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 107. [2022-03-20 13:54:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 84 states have internal predecessors, (95), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 13:54:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2022-03-20 13:54:32,233 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 42 [2022-03-20 13:54:32,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:54:32,233 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2022-03-20 13:54:32,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:54:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2022-03-20 13:54:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 13:54:32,234 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:54:32,234 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:54:32,252 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 13:54:32,450 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 13:54:32,450 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:54:32,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:54:32,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1526027469, now seen corresponding path program 3 times [2022-03-20 13:54:32,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:32,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1452439137] [2022-03-20 13:54:32,454 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:54:32,454 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:54:32,454 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:54:32,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1526027469, now seen corresponding path program 4 times [2022-03-20 13:54:32,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:54:32,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065302730] [2022-03-20 13:54:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:54:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:54:32,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:54:32,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433159912] [2022-03-20 13:54:32,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:54:32,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:54:32,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:54:32,460 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 13:54:32,461 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 13:54:32,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:54:32,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:54:32,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 13:54:32,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:54:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:54:32,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:54:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:54:32,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:54:32,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065302730] [2022-03-20 13:54:32,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:54:32,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433159912] [2022-03-20 13:54:32,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433159912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:54:32,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:54:32,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 13:54:32,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:54:32,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1452439137] [2022-03-20 13:54:32,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1452439137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:54:32,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:54:32,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:54:32,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468736872] [2022-03-20 13:54:32,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:54:32,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:54:32,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:32,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:54:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:54:32,681 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:54:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:54:32,747 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2022-03-20 13:54:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:54:32,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-03-20 13:54:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:54:32,748 INFO L225 Difference]: With dead ends: 131 [2022-03-20 13:54:32,748 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 13:54:32,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:54:32,748 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:54:32,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:54:32,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 13:54:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2022-03-20 13:54:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 95 states have internal predecessors, (106), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 13:54:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-03-20 13:54:32,772 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 43 [2022-03-20 13:54:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:54:32,772 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-03-20 13:54:32,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:54:32,772 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-03-20 13:54:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 13:54:32,772 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:54:32,772 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:54:32,789 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 13:54:32,987 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 13:54:32,987 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:54:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:54:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash -684010378, now seen corresponding path program 1 times [2022-03-20 13:54:32,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:32,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926191923] [2022-03-20 13:54:32,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:54:32,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:54:32,990 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:54:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash -684010378, now seen corresponding path program 2 times [2022-03-20 13:54:32,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:54:32,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47440614] [2022-03-20 13:54:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:54:32,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:54:32,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:54:32,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80006881] [2022-03-20 13:54:32,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:54:32,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:54:32,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:54:32,996 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 13:54:33,002 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 13:54:33,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:54:33,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:54:33,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 13:54:33,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:54:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 13:54:33,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:54:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 13:54:33,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:54:33,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47440614] [2022-03-20 13:54:33,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:54:33,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80006881] [2022-03-20 13:54:33,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80006881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:54:33,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:54:33,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 13:54:33,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:54:33,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926191923] [2022-03-20 13:54:33,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926191923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:54:33,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:54:33,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:54:33,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673757484] [2022-03-20 13:54:33,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:54:33,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:54:33,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:33,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:54:33,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:54:33,418 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:54:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:54:33,519 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2022-03-20 13:54:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:54:33,519 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2022-03-20 13:54:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:54:33,520 INFO L225 Difference]: With dead ends: 136 [2022-03-20 13:54:33,520 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 13:54:33,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:54:33,520 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:54:33,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 173 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:54:33,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 13:54:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2022-03-20 13:54:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 97 states have (on average 1.134020618556701) internal successors, (110), 99 states have internal predecessors, (110), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 13:54:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2022-03-20 13:54:33,539 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 49 [2022-03-20 13:54:33,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:54:33,539 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2022-03-20 13:54:33,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:54:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2022-03-20 13:54:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 13:54:33,540 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:54:33,540 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:54:33,556 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 13:54:33,755 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 13:54:33,756 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:54:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:54:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash 736401910, now seen corresponding path program 3 times [2022-03-20 13:54:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:33,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [103816036] [2022-03-20 13:54:33,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:54:33,759 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:54:33,759 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:54:33,759 INFO L85 PathProgramCache]: Analyzing trace with hash 736401910, now seen corresponding path program 4 times [2022-03-20 13:54:33,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:54:33,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251423312] [2022-03-20 13:54:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:54:33,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:54:33,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:54:33,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584691928] [2022-03-20 13:54:33,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:54:33,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:54:33,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:54:33,766 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 13:54:33,767 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 13:54:33,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:54:33,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:54:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 13:54:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:54:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 13:54:34,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:54:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 13:54:34,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:54:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251423312] [2022-03-20 13:54:34,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:54:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584691928] [2022-03-20 13:54:34,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584691928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:54:34,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:54:34,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 13:54:34,153 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:54:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [103816036] [2022-03-20 13:54:34,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [103816036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:54:34,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:54:34,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:54:34,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554586386] [2022-03-20 13:54:34,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:54:34,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:54:34,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:34,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:54:34,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:54:34,154 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:54:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:54:34,230 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2022-03-20 13:54:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:54:34,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2022-03-20 13:54:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:54:34,231 INFO L225 Difference]: With dead ends: 138 [2022-03-20 13:54:34,231 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 13:54:34,231 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:54:34,232 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:54:34,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 156 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:54:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 13:54:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2022-03-20 13:54:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 96 states have internal predecessors, (107), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 13:54:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2022-03-20 13:54:34,249 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 49 [2022-03-20 13:54:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:54:34,249 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2022-03-20 13:54:34,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:54:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2022-03-20 13:54:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 13:54:34,249 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:54:34,249 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:54:34,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 13:54:34,465 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 13:54:34,466 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:54:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:54:34,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1528015880, now seen corresponding path program 5 times [2022-03-20 13:54:34,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:54:34,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1191925872] [2022-03-20 13:54:34,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:54:34,469 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:54:34,469 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:54:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1528015880, now seen corresponding path program 6 times [2022-03-20 13:54:34,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:54:34,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603068903] [2022-03-20 13:54:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:54:34,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:54:34,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:54:34,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305664341] [2022-03-20 13:54:34,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:54:34,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:54:34,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:54:34,476 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 13:54:34,507 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 13:54:34,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 13:54:34,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:54:34,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 13:54:34,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:54:34,752 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:54:34,772 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:54:34,773 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:54:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-20 13:54:45,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:54:45,681 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:57:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-20 13:57:28,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:57:28,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603068903] [2022-03-20 13:57:28,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:57:28,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305664341] [2022-03-20 13:57:28,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305664341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:57:28,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:57:28,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-20 13:57:28,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:57:28,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1191925872] [2022-03-20 13:57:28,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1191925872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:57:28,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:57:28,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:57:28,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142734096] [2022-03-20 13:57:28,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:57:28,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:57:28,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:57:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:57:28,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=458, Unknown=10, NotChecked=0, Total=552 [2022-03-20 13:57:28,344 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:57:30,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:57:33,026 WARN L534 Checker$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 13:57:42,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:57:48,366 WARN L534 Checker$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 13:57:48,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:57:48,774 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2022-03-20 13:57:48,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 13:57:48,774 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2022-03-20 13:57:48,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:57:48,775 INFO L225 Difference]: With dead ends: 148 [2022-03-20 13:57:48,775 INFO L226 Difference]: Without dead ends: 140 [2022-03-20 13:57:48,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=154, Invalid=826, Unknown=12, NotChecked=0, Total=992 [2022-03-20 13:57:48,776 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 12 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:57:48,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 231 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 312 Invalid, 3 Unknown, 0 Unchecked, 9.1s Time] [2022-03-20 13:57:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-20 13:57:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2022-03-20 13:57:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 105 states have internal predecessors, (117), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 13:57:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2022-03-20 13:57:48,795 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 49 [2022-03-20 13:57:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:57:48,795 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2022-03-20 13:57:48,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:57:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2022-03-20 13:57:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 13:57:48,795 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:57:48,795 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:57:48,814 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 13:57:49,001 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 13:57:49,002 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:57:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:57:49,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1387467270, now seen corresponding path program 5 times [2022-03-20 13:57:49,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:57:49,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1655960464] [2022-03-20 13:57:49,004 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:57:49,004 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:57:49,004 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:57:49,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1387467270, now seen corresponding path program 6 times [2022-03-20 13:57:49,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:57:49,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144211853] [2022-03-20 13:57:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:57:49,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:57:49,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:57:49,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729545105] [2022-03-20 13:57:49,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:57:49,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:57:49,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:57:49,010 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 13:57:49,011 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 13:57:49,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 13:57:49,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:57:49,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 13:57:49,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:57:50,402 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:57:50,404 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:57:50,405 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:58:22,088 WARN L232 SmtUtils]: Spent 15.73s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:59:11,221 WARN L232 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-20 13:59:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 13:59:15,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:59:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-20 13:59:30,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:59:30,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144211853] [2022-03-20 13:59:30,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:59:30,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729545105] [2022-03-20 13:59:30,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729545105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:59:30,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:59:30,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-03-20 13:59:30,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:59:30,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1655960464] [2022-03-20 13:59:30,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1655960464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:59:30,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:59:30,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:59:30,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308510382] [2022-03-20 13:59:30,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:59:30,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:59:30,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:59:30,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:59:30,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=339, Unknown=9, NotChecked=0, Total=420 [2022-03-20 13:59:30,968 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:59:33,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:59:37,983 WARN L534 Checker$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 13:59:45,374 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 13:59:49,588 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_main_~X~0 c_main_~y~0)) (.cse3 (+ c_main_~X~0 1))) (and (let ((.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) .cse7)) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0) (not (<= c_main_~x~0 c_main_~X~0)) (= (+ (* 2 (* c_main_~Y~0 c_main_~x~0)) (* 2 c_main_~Y~0)) (+ (* 2 .cse7) c_main_~v~0 c_main_~X~0)) (<= c_main_~x~0 .cse3))) is different from false [2022-03-20 13:59:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:59:49,848 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2022-03-20 13:59:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:59:49,849 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2022-03-20 13:59:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:59:49,849 INFO L225 Difference]: With dead ends: 145 [2022-03-20 13:59:49,850 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 13:59:49,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=172, Invalid=692, Unknown=10, NotChecked=56, Total=930 [2022-03-20 13:59:49,850 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:59:49,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 163 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 3 Unknown, 1 Unchecked, 6.9s Time] [2022-03-20 13:59:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 13:59:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 120. [2022-03-20 13:59:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.118279569892473) internal successors, (104), 95 states have internal predecessors, (104), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 13:59:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2022-03-20 13:59:49,886 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 49 [2022-03-20 13:59:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:59:49,886 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2022-03-20 13:59:49,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:59:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2022-03-20 13:59:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 13:59:49,888 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:59:49,888 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:59:49,896 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 13:59:50,094 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 13:59:50,094 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:59:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:59:50,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1434541020, now seen corresponding path program 11 times [2022-03-20 13:59:50,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:59:50,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [284492242] [2022-03-20 13:59:50,098 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:59:50,098 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:59:50,098 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:59:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1434541020, now seen corresponding path program 12 times [2022-03-20 13:59:50,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:59:50,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815893926] [2022-03-20 13:59:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:59:50,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:59:50,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:59:50,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000831807] [2022-03-20 13:59:50,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:59:50,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:59:50,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:59:50,111 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 13:59:50,111 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 13:59:50,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 13:59:50,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:59:50,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 13:59:50,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:59:51,943 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:59:51,944 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:59:51,947 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:59:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 13:59:56,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:59:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 13:59:57,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:59:57,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815893926] [2022-03-20 13:59:57,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:59:57,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000831807] [2022-03-20 13:59:57,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000831807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:59:57,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:59:57,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-03-20 13:59:57,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:59:57,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [284492242] [2022-03-20 13:59:57,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [284492242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:59:57,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:59:57,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:59:57,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097554645] [2022-03-20 13:59:57,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:59:57,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:59:57,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:59:57,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:59:57,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=292, Unknown=1, NotChecked=0, Total=342 [2022-03-20 13:59:57,264 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:59:59,722 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 14:00:01,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:00:06,008 WARN L534 Checker$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 14:00:08,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:00:12,242 WARN L534 Checker$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 14:00:14,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:00:49,305 WARN L232 SmtUtils]: Spent 32.63s on a formula simplification. DAG size of input: 67 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:00:52,122 WARN L534 Checker$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 14:00:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:00:52,233 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2022-03-20 14:00:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 14:00:52,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-03-20 14:00:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:00:52,235 INFO L225 Difference]: With dead ends: 137 [2022-03-20 14:00:52,235 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 14:00:52,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=87, Invalid=462, Unknown=3, NotChecked=0, Total=552 [2022-03-20 14:00:52,236 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 6 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-03-20 14:00:52,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 157 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 233 Invalid, 7 Unknown, 0 Unchecked, 15.7s Time] [2022-03-20 14:00:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 14:00:52,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 120. [2022-03-20 14:00:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.118279569892473) internal successors, (104), 95 states have internal predecessors, (104), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 14:00:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2022-03-20 14:00:52,258 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 52 [2022-03-20 14:00:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:00:52,258 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2022-03-20 14:00:52,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 14:00:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2022-03-20 14:00:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 14:00:52,258 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:00:52,258 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:00:52,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 14:00:52,463 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 14:00:52,463 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:00:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:00:52,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1654553692, now seen corresponding path program 13 times [2022-03-20 14:00:52,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:52,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1148584494] [2022-03-20 14:00:52,468 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:00:52,468 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:00:52,468 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:00:52,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1654553692, now seen corresponding path program 14 times [2022-03-20 14:00:52,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:00:52,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612476266] [2022-03-20 14:00:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:00:52,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:00:52,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:00:52,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984012993] [2022-03-20 14:00:52,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:00:52,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:00:52,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:00:52,480 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 14:00:52,480 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 14:00:52,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:00:52,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:00:52,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 14:00:52,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:00:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 14:00:55,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:00:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 14:00:58,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:00:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612476266] [2022-03-20 14:00:58,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:00:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984012993] [2022-03-20 14:00:58,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984012993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:00:58,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:00:58,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-03-20 14:00:58,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:00:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1148584494] [2022-03-20 14:00:58,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1148584494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:00:58,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:00:58,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 14:00:58,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352056980] [2022-03-20 14:00:58,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:00:58,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 14:00:58,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 14:00:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-20 14:00:58,060 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 14:01:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:01:00,987 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2022-03-20 14:01:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 14:01:00,988 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2022-03-20 14:01:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:01:00,989 INFO L225 Difference]: With dead ends: 156 [2022-03-20 14:01:00,989 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 14:01:00,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-03-20 14:01:00,989 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:01:00,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 310 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 14:01:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 14:01:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2022-03-20 14:01:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 111 states have internal predecessors, (122), 16 states have call successors, (16), 15 states have call predecessors, (16), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 14:01:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2022-03-20 14:01:01,026 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 52 [2022-03-20 14:01:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:01:01,026 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2022-03-20 14:01:01,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 14:01:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2022-03-20 14:01:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 14:01:01,027 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:01:01,027 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:01:01,044 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 14:01:01,243 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 14:01:01,243 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:01:01,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:01:01,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1831066978, now seen corresponding path program 15 times [2022-03-20 14:01:01,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:01,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1378527073] [2022-03-20 14:01:01,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:01:01,247 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:01:01,247 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:01:01,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1831066978, now seen corresponding path program 16 times [2022-03-20 14:01:01,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:01:01,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26734328] [2022-03-20 14:01:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:01:01,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:01:01,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:01:01,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23302993] [2022-03-20 14:01:01,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:01:01,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:01:01,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:01:01,254 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 14:01:01,255 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 14:01:01,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:01:01,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:01:01,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 14:01:01,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:01:03,473 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:06,017 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 14 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 14:01:07,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:01:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 14:01:09,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:01:09,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26734328] [2022-03-20 14:01:09,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:01:09,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23302993] [2022-03-20 14:01:09,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23302993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:01:09,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:01:09,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 29 [2022-03-20 14:01:09,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:01:09,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1378527073] [2022-03-20 14:01:09,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1378527073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:01:09,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:01:09,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 14:01:09,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855528453] [2022-03-20 14:01:09,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:01:09,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 14:01:09,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:09,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 14:01:09,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-20 14:01:09,861 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 14:01:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:01:14,423 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2022-03-20 14:01:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 14:01:14,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2022-03-20 14:01:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:01:14,424 INFO L225 Difference]: With dead ends: 154 [2022-03-20 14:01:14,424 INFO L226 Difference]: Without dead ends: 152 [2022-03-20 14:01:14,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 14:01:14,425 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:01:14,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 423 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 14:01:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-20 14:01:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2022-03-20 14:01:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 112 states have (on average 1.125) internal successors, (126), 114 states have internal predecessors, (126), 16 states have call successors, (16), 15 states have call predecessors, (16), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 14:01:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2022-03-20 14:01:14,467 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 52 [2022-03-20 14:01:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:01:14,467 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2022-03-20 14:01:14,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 14:01:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2022-03-20 14:01:14,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 14:01:14,500 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:01:14,500 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:01:14,516 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 14:01:14,700 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 14:01:14,700 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:01:14,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:01:14,701 INFO L85 PathProgramCache]: Analyzing trace with hash -169882076, now seen corresponding path program 17 times [2022-03-20 14:01:14,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:14,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [476252125] [2022-03-20 14:01:14,703 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:01:14,704 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:01:14,704 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:01:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash -169882076, now seen corresponding path program 18 times [2022-03-20 14:01:14,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:01:14,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832320305] [2022-03-20 14:01:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:01:14,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:01:14,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:01:14,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520840339] [2022-03-20 14:01:14,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:01:14,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:01:14,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:01:14,710 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 14:01:14,711 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 14:01:14,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 14:01:14,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:01:14,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 14:01:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:01:15,124 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:15,125 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:15,128 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 14:01:18,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:01:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 14:01:19,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:01:19,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832320305] [2022-03-20 14:01:19,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:01:19,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520840339] [2022-03-20 14:01:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520840339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:01:19,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:01:19,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2022-03-20 14:01:19,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:01:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [476252125] [2022-03-20 14:01:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [476252125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:01:19,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:01:19,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:01:19,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977523243] [2022-03-20 14:01:19,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:01:19,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:01:19,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:19,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:01:19,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2022-03-20 14:01:19,472 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:01:56,508 WARN L232 SmtUtils]: Spent 36.88s on a formula simplification. DAG size of input: 69 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:01:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:01:56,932 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2022-03-20 14:01:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:01:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-20 14:01:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:01:56,933 INFO L225 Difference]: With dead ends: 149 [2022-03-20 14:01:56,933 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 14:01:56,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2022-03-20 14:01:56,933 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:01:56,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 84 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2022-03-20 14:01:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 14:01:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2022-03-20 14:01:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 97 states have internal predecessors, (107), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 14:01:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2022-03-20 14:01:56,972 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 52 [2022-03-20 14:01:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:01:56,972 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2022-03-20 14:01:56,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:01:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2022-03-20 14:01:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 14:01:56,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:01:56,973 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:01:56,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 14:01:57,174 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 14:01:57,174 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:01:57,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:01:57,174 INFO L85 PathProgramCache]: Analyzing trace with hash 92500749, now seen corresponding path program 5 times [2022-03-20 14:01:57,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:57,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [823534774] [2022-03-20 14:01:57,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:01:57,179 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:01:57,179 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:01:57,179 INFO L85 PathProgramCache]: Analyzing trace with hash 92500749, now seen corresponding path program 6 times [2022-03-20 14:01:57,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:01:57,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114524503] [2022-03-20 14:01:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:01:57,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:01:57,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:01:57,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211738687] [2022-03-20 14:01:57,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:01:57,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:01:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:01:57,184 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 14:01:57,185 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 14:01:57,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 14:01:57,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:01:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 14:01:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:01:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:01:57,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:01:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:01:58,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:01:58,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114524503] [2022-03-20 14:01:58,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:01:58,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211738687] [2022-03-20 14:01:58,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211738687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:01:58,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:01:58,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 14:01:58,616 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:01:58,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [823534774] [2022-03-20 14:01:58,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [823534774] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:01:58,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:01:58,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 14:01:58,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306348542] [2022-03-20 14:01:58,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:01:58,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 14:01:58,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:58,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 14:01:58,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:01:58,617 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 14:01:58,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:01:58,976 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2022-03-20 14:01:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 14:01:58,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 53 [2022-03-20 14:01:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:01:58,977 INFO L225 Difference]: With dead ends: 153 [2022-03-20 14:01:58,977 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 14:01:58,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:01:58,977 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:01:58,977 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 97 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:01:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 14:01:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2022-03-20 14:01:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 113 states have internal predecessors, (124), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 14:01:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2022-03-20 14:01:59,015 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 53 [2022-03-20 14:01:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:01:59,015 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2022-03-20 14:01:59,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 14:01:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2022-03-20 14:01:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 14:01:59,017 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:01:59,017 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:01:59,033 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 14:01:59,221 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 14:01:59,221 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:01:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:01:59,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1555087693, now seen corresponding path program 7 times [2022-03-20 14:01:59,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:59,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2127438737] [2022-03-20 14:01:59,224 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:01:59,224 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:01:59,224 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:01:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1555087693, now seen corresponding path program 8 times [2022-03-20 14:01:59,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:01:59,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064289681] [2022-03-20 14:01:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:01:59,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:01:59,228 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:01:59,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760883158] [2022-03-20 14:01:59,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:01:59,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:01:59,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:01:59,229 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 14:01:59,230 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 14:01:59,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:01:59,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:01:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 14:01:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:00,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 14:02:01,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064289681] [2022-03-20 14:02:01,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760883158] [2022-03-20 14:02:01,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760883158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:01,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:01,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 14:02:01,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2127438737] [2022-03-20 14:02:01,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2127438737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:01,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:01,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:02:01,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444602971] [2022-03-20 14:02:01,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:01,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:02:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:02:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 14:02:01,048 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 14:02:01,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:01,568 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2022-03-20 14:02:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:02:01,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 63 [2022-03-20 14:02:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:01,570 INFO L225 Difference]: With dead ends: 173 [2022-03-20 14:02:01,570 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 14:02:01,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-20 14:02:01,570 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:01,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:02:01,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 14:02:01,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2022-03-20 14:02:01,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 129 states have internal predecessors, (142), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 14:02:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 176 transitions. [2022-03-20 14:02:01,608 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 176 transitions. Word has length 63 [2022-03-20 14:02:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:01,608 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 176 transitions. [2022-03-20 14:02:01,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 14:02:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 176 transitions. [2022-03-20 14:02:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 14:02:01,609 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:01,609 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:01,627 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 14:02:01,825 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 14:02:01,826 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1195458445, now seen corresponding path program 9 times [2022-03-20 14:02:01,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:01,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2143582223] [2022-03-20 14:02:01,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:02:01,829 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:02:01,829 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:02:01,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1195458445, now seen corresponding path program 10 times [2022-03-20 14:02:01,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:01,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658280774] [2022-03-20 14:02:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:01,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:01,833 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:01,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052545125] [2022-03-20 14:02:01,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:02:01,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:01,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:01,834 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 14:02:01,836 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 14:02:01,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:02:01,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:01,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 14:02:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 12 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:02,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 12 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 14:02:03,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:03,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658280774] [2022-03-20 14:02:03,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:03,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052545125] [2022-03-20 14:02:03,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052545125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:03,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:03,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 14:02:03,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:03,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2143582223] [2022-03-20 14:02:03,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2143582223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:03,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:03,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 14:02:03,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208028511] [2022-03-20 14:02:03,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:03,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 14:02:03,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:03,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 14:02:03,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 14:02:03,885 INFO L87 Difference]: Start difference. First operand 164 states and 176 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 14:02:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:04,413 INFO L93 Difference]: Finished difference Result 193 states and 207 transitions. [2022-03-20 14:02:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 14:02:04,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 73 [2022-03-20 14:02:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:04,414 INFO L225 Difference]: With dead ends: 193 [2022-03-20 14:02:04,414 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 14:02:04,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:02:04,415 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:04,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 122 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:02:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 14:02:04,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-03-20 14:02:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 145 states have (on average 1.103448275862069) internal successors, (160), 145 states have internal predecessors, (160), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 14:02:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 198 transitions. [2022-03-20 14:02:04,462 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 198 transitions. Word has length 73 [2022-03-20 14:02:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:04,464 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 198 transitions. [2022-03-20 14:02:04,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 14:02:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 198 transitions. [2022-03-20 14:02:04,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 14:02:04,465 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:04,465 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:04,497 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 14:02:04,681 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 14:02:04,681 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash 116977101, now seen corresponding path program 11 times [2022-03-20 14:02:04,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:04,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [989183209] [2022-03-20 14:02:04,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:02:04,686 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:02:04,686 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:02:04,686 INFO L85 PathProgramCache]: Analyzing trace with hash 116977101, now seen corresponding path program 12 times [2022-03-20 14:02:04,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:04,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451245635] [2022-03-20 14:02:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:04,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:04,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:04,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459261597] [2022-03-20 14:02:04,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:02:04,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:04,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:04,693 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 14:02:04,694 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 14:02:04,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 14:02:04,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:04,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 14:02:04,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 14 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:05,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 14 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 14:02:07,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:07,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451245635] [2022-03-20 14:02:07,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:07,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459261597] [2022-03-20 14:02:07,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459261597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:07,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:07,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 14:02:07,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:07,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [989183209] [2022-03-20 14:02:07,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [989183209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:07,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:07,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:02:07,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477657549] [2022-03-20 14:02:07,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:07,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:02:07,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:07,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:02:07,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 14:02:07,062 INFO L87 Difference]: Start difference. First operand 184 states and 198 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 14:02:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:07,704 INFO L93 Difference]: Finished difference Result 213 states and 229 transitions. [2022-03-20 14:02:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 14:02:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 83 [2022-03-20 14:02:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:07,705 INFO L225 Difference]: With dead ends: 213 [2022-03-20 14:02:07,705 INFO L226 Difference]: Without dead ends: 207 [2022-03-20 14:02:07,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-20 14:02:07,706 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:07,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 124 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:02:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-20 14:02:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2022-03-20 14:02:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 161 states have (on average 1.1055900621118013) internal successors, (178), 161 states have internal predecessors, (178), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 14:02:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 220 transitions. [2022-03-20 14:02:07,761 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 220 transitions. Word has length 83 [2022-03-20 14:02:07,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:07,761 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 220 transitions. [2022-03-20 14:02:07,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 14:02:07,761 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 220 transitions. [2022-03-20 14:02:07,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 14:02:07,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:07,762 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:07,779 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 14:02:07,979 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 14:02:07,979 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2023476237, now seen corresponding path program 13 times [2022-03-20 14:02:07,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:07,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1393086817] [2022-03-20 14:02:07,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:02:07,982 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:02:07,982 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:02:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2023476237, now seen corresponding path program 14 times [2022-03-20 14:02:07,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:07,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992098347] [2022-03-20 14:02:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:07,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:08,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:08,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716775169] [2022-03-20 14:02:08,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:02:08,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:08,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:08,003 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 14:02:08,004 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 14:02:08,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:02:08,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:08,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 14:02:08,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 16 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:09,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 16 proven. 184 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 14:02:10,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:10,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992098347] [2022-03-20 14:02:10,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:10,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716775169] [2022-03-20 14:02:10,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716775169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:10,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:10,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 14:02:10,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:10,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1393086817] [2022-03-20 14:02:10,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1393086817] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:10,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:10,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 14:02:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100189617] [2022-03-20 14:02:10,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:10,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 14:02:10,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 14:02:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 14:02:10,691 INFO L87 Difference]: Start difference. First operand 204 states and 220 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 14:02:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:11,469 INFO L93 Difference]: Finished difference Result 233 states and 251 transitions. [2022-03-20 14:02:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 14:02:11,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 93 [2022-03-20 14:02:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:11,470 INFO L225 Difference]: With dead ends: 233 [2022-03-20 14:02:11,470 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 14:02:11,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-20 14:02:11,471 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:11,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 140 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:02:11,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 14:02:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-03-20 14:02:11,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 177 states have (on average 1.1073446327683616) internal successors, (196), 177 states have internal predecessors, (196), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 14:02:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 242 transitions. [2022-03-20 14:02:11,531 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 242 transitions. Word has length 93 [2022-03-20 14:02:11,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:11,531 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 242 transitions. [2022-03-20 14:02:11,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 14:02:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 242 transitions. [2022-03-20 14:02:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 14:02:11,532 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:11,532 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:11,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:11,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:11,747 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:11,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:11,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1408096845, now seen corresponding path program 15 times [2022-03-20 14:02:11,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:11,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [187644299] [2022-03-20 14:02:11,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:02:11,750 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:02:11,750 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:02:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1408096845, now seen corresponding path program 16 times [2022-03-20 14:02:11,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:11,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149713356] [2022-03-20 14:02:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:11,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:11,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:11,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771353611] [2022-03-20 14:02:11,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:02:11,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:11,758 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:11,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 14:02:11,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:02:11,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:11,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 14:02:11,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 18 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:13,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 18 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 14:02:14,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:14,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149713356] [2022-03-20 14:02:14,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:14,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771353611] [2022-03-20 14:02:14,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771353611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:14,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:14,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 14:02:14,877 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:14,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [187644299] [2022-03-20 14:02:14,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [187644299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:14,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:14,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:02:14,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467774949] [2022-03-20 14:02:14,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:14,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:02:14,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:02:14,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:02:14,878 INFO L87 Difference]: Start difference. First operand 224 states and 242 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 14:02:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:15,742 INFO L93 Difference]: Finished difference Result 253 states and 273 transitions. [2022-03-20 14:02:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 14:02:15,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 103 [2022-03-20 14:02:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:15,743 INFO L225 Difference]: With dead ends: 253 [2022-03-20 14:02:15,743 INFO L226 Difference]: Without dead ends: 247 [2022-03-20 14:02:15,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 14:02:15,744 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:15,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 135 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:02:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-20 14:02:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2022-03-20 14:02:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 193 states have (on average 1.1088082901554404) internal successors, (214), 193 states have internal predecessors, (214), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 14:02:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2022-03-20 14:02:15,802 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 103 [2022-03-20 14:02:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:15,802 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2022-03-20 14:02:15,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 14:02:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2022-03-20 14:02:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 14:02:15,803 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:15,803 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:15,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:16,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 14:02:16,015 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1806899341, now seen corresponding path program 17 times [2022-03-20 14:02:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:16,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [816223042] [2022-03-20 14:02:16,018 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:02:16,018 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:02:16,018 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:02:16,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1806899341, now seen corresponding path program 18 times [2022-03-20 14:02:16,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:16,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491059645] [2022-03-20 14:02:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:16,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:16,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:16,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533700650] [2022-03-20 14:02:16,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:02:16,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:16,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:16,030 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:16,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 14:02:16,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-20 14:02:16,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:16,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 14:02:16,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:17,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 290 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 14:02:19,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491059645] [2022-03-20 14:02:19,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533700650] [2022-03-20 14:02:19,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533700650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:19,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:19,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 14:02:19,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [816223042] [2022-03-20 14:02:19,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [816223042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:19,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:19,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:02:19,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794905270] [2022-03-20 14:02:19,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:19,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:02:19,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:19,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:02:19,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 14:02:19,563 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 13 states have internal predecessors, (89), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:02:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:20,531 INFO L93 Difference]: Finished difference Result 273 states and 295 transitions. [2022-03-20 14:02:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 14:02:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 13 states have internal predecessors, (89), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 113 [2022-03-20 14:02:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:20,532 INFO L225 Difference]: With dead ends: 273 [2022-03-20 14:02:20,532 INFO L226 Difference]: Without dead ends: 267 [2022-03-20 14:02:20,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 14:02:20,533 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:20,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 158 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:02:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-20 14:02:20,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2022-03-20 14:02:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 209 states have (on average 1.1100478468899522) internal successors, (232), 209 states have internal predecessors, (232), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 14:02:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 286 transitions. [2022-03-20 14:02:20,599 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 286 transitions. Word has length 113 [2022-03-20 14:02:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:20,600 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 286 transitions. [2022-03-20 14:02:20,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 13 states have internal predecessors, (89), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:02:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 286 transitions. [2022-03-20 14:02:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 14:02:20,601 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:20,601 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:20,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 14:02:20,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:20,808 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:20,809 INFO L85 PathProgramCache]: Analyzing trace with hash -307263795, now seen corresponding path program 19 times [2022-03-20 14:02:20,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:20,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1773059519] [2022-03-20 14:02:20,811 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:02:20,811 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:02:20,811 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:02:20,811 INFO L85 PathProgramCache]: Analyzing trace with hash -307263795, now seen corresponding path program 20 times [2022-03-20 14:02:20,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:20,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578503621] [2022-03-20 14:02:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:20,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:20,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860027071] [2022-03-20 14:02:20,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:02:20,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:20,822 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:20,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 14:02:20,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:02:20,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:20,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 14:02:20,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 22 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:22,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 22 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 14:02:24,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:24,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578503621] [2022-03-20 14:02:24,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:24,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860027071] [2022-03-20 14:02:24,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860027071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:24,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:24,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-20 14:02:24,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:24,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1773059519] [2022-03-20 14:02:24,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1773059519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:24,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:24,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 14:02:24,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016497793] [2022-03-20 14:02:24,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:24,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 14:02:24,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:24,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 14:02:24,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-20 14:02:24,704 INFO L87 Difference]: Start difference. First operand 264 states and 286 transitions. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 14 states have internal predecessors, (97), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 14:02:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:25,830 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2022-03-20 14:02:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 14:02:25,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 14 states have internal predecessors, (97), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 123 [2022-03-20 14:02:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:25,831 INFO L225 Difference]: With dead ends: 293 [2022-03-20 14:02:25,831 INFO L226 Difference]: Without dead ends: 287 [2022-03-20 14:02:25,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 14:02:25,832 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:25,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 181 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:02:25,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-20 14:02:25,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2022-03-20 14:02:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 225 states have (on average 1.1111111111111112) internal successors, (250), 225 states have internal predecessors, (250), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 14:02:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 308 transitions. [2022-03-20 14:02:25,910 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 308 transitions. Word has length 123 [2022-03-20 14:02:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:25,910 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 308 transitions. [2022-03-20 14:02:25,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 14 states have internal predecessors, (97), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 14:02:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 308 transitions. [2022-03-20 14:02:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 14:02:25,911 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:25,911 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:25,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:26,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:26,127 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:26,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1566104307, now seen corresponding path program 21 times [2022-03-20 14:02:26,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:26,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [918536510] [2022-03-20 14:02:26,130 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:02:26,130 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:02:26,130 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:02:26,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1566104307, now seen corresponding path program 22 times [2022-03-20 14:02:26,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:26,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886352076] [2022-03-20 14:02:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:26,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:26,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:26,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200750364] [2022-03-20 14:02:26,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:02:26,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:26,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:26,136 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:26,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 14:02:26,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:02:26,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:26,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 14:02:26,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 24 proven. 684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:28,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 24 proven. 420 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 14:02:30,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:30,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886352076] [2022-03-20 14:02:30,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:30,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200750364] [2022-03-20 14:02:30,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200750364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:30,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:30,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 14:02:30,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:30,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [918536510] [2022-03-20 14:02:30,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [918536510] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:30,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:30,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:02:30,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208513086] [2022-03-20 14:02:30,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:30,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:02:30,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:02:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 14:02:30,543 INFO L87 Difference]: Start difference. First operand 284 states and 308 transitions. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 15 states have internal predecessors, (105), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 14:02:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:31,728 INFO L93 Difference]: Finished difference Result 313 states and 339 transitions. [2022-03-20 14:02:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 14:02:31,728 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 15 states have internal predecessors, (105), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 133 [2022-03-20 14:02:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:31,729 INFO L225 Difference]: With dead ends: 313 [2022-03-20 14:02:31,729 INFO L226 Difference]: Without dead ends: 307 [2022-03-20 14:02:31,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 14:02:31,730 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:31,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 183 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 14:02:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-20 14:02:31,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 304. [2022-03-20 14:02:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 241 states have (on average 1.112033195020747) internal successors, (268), 241 states have internal predecessors, (268), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 14:02:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 330 transitions. [2022-03-20 14:02:31,805 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 330 transitions. Word has length 133 [2022-03-20 14:02:31,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:31,805 INFO L478 AbstractCegarLoop]: Abstraction has 304 states and 330 transitions. [2022-03-20 14:02:31,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 15 states have internal predecessors, (105), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 14:02:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 330 transitions. [2022-03-20 14:02:31,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 14:02:31,806 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:31,806 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:31,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:32,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 14:02:32,023 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:32,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:32,024 INFO L85 PathProgramCache]: Analyzing trace with hash 777909069, now seen corresponding path program 23 times [2022-03-20 14:02:32,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:32,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [499126948] [2022-03-20 14:02:32,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:02:32,027 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:02:32,027 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:02:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash 777909069, now seen corresponding path program 24 times [2022-03-20 14:02:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:32,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592860655] [2022-03-20 14:02:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:32,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:32,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:32,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982633306] [2022-03-20 14:02:32,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:02:32,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:32,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:32,034 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:32,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 14:02:32,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-20 14:02:32,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:32,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 14:02:32,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 26 proven. 806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:34,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 26 proven. 494 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 14:02:36,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:36,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592860655] [2022-03-20 14:02:36,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:36,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982633306] [2022-03-20 14:02:36,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982633306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:36,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:36,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-20 14:02:36,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:36,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [499126948] [2022-03-20 14:02:36,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [499126948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:36,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:36,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 14:02:36,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586654255] [2022-03-20 14:02:36,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:36,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 14:02:36,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 14:02:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-20 14:02:36,976 INFO L87 Difference]: Start difference. First operand 304 states and 330 transitions. Second operand has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 14:02:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:38,362 INFO L93 Difference]: Finished difference Result 333 states and 361 transitions. [2022-03-20 14:02:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 14:02:38,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 143 [2022-03-20 14:02:38,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:38,366 INFO L225 Difference]: With dead ends: 333 [2022-03-20 14:02:38,367 INFO L226 Difference]: Without dead ends: 327 [2022-03-20 14:02:38,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 14:02:38,368 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:38,368 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 199 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 14:02:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-03-20 14:02:38,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 324. [2022-03-20 14:02:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 257 states have (on average 1.11284046692607) internal successors, (286), 257 states have internal predecessors, (286), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 14:02:38,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 352 transitions. [2022-03-20 14:02:38,467 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 352 transitions. Word has length 143 [2022-03-20 14:02:38,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:38,467 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 352 transitions. [2022-03-20 14:02:38,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 14:02:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 352 transitions. [2022-03-20 14:02:38,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 14:02:38,470 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:38,470 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:38,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:38,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 14:02:38,674 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:38,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1335357837, now seen corresponding path program 25 times [2022-03-20 14:02:38,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:38,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1081251728] [2022-03-20 14:02:38,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:02:38,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:02:38,677 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:02:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1335357837, now seen corresponding path program 26 times [2022-03-20 14:02:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:38,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380709536] [2022-03-20 14:02:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:38,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:38,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:38,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139080090] [2022-03-20 14:02:38,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:02:38,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:38,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:38,684 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:38,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 14:02:38,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:02:38,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:38,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 14:02:38,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 28 proven. 938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:40,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 28 proven. 574 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-20 14:02:43,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:43,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380709536] [2022-03-20 14:02:43,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:43,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139080090] [2022-03-20 14:02:43,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139080090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:43,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:43,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 14:02:43,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:43,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1081251728] [2022-03-20 14:02:43,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1081251728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:43,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:43,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 14:02:43,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078092769] [2022-03-20 14:02:43,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:43,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 14:02:43,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:43,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 14:02:43,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 14:02:44,000 INFO L87 Difference]: Start difference. First operand 324 states and 352 transitions. Second operand has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 14:02:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:45,430 INFO L93 Difference]: Finished difference Result 353 states and 383 transitions. [2022-03-20 14:02:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 14:02:45,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 153 [2022-03-20 14:02:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:45,445 INFO L225 Difference]: With dead ends: 353 [2022-03-20 14:02:45,445 INFO L226 Difference]: Without dead ends: 347 [2022-03-20 14:02:45,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 14:02:45,446 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:45,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 208 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 14:02:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-20 14:02:45,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2022-03-20 14:02:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 273 states have (on average 1.1135531135531136) internal successors, (304), 273 states have internal predecessors, (304), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 14:02:45,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 374 transitions. [2022-03-20 14:02:45,574 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 374 transitions. Word has length 153 [2022-03-20 14:02:45,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:45,575 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 374 transitions. [2022-03-20 14:02:45,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 14:02:45,575 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 374 transitions. [2022-03-20 14:02:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 14:02:45,576 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:45,576 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:45,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:45,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 14:02:45,791 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:45,792 INFO L85 PathProgramCache]: Analyzing trace with hash 538517453, now seen corresponding path program 27 times [2022-03-20 14:02:45,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:45,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [370920421] [2022-03-20 14:02:45,795 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:02:45,795 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:02:45,795 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:02:45,795 INFO L85 PathProgramCache]: Analyzing trace with hash 538517453, now seen corresponding path program 28 times [2022-03-20 14:02:45,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:45,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553232502] [2022-03-20 14:02:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:45,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:45,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:45,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647280647] [2022-03-20 14:02:45,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:02:45,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:45,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:45,804 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:45,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 14:02:45,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:02:45,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:45,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 14:02:45,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 30 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:48,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 30 proven. 660 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 14:02:51,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:51,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553232502] [2022-03-20 14:02:51,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:51,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647280647] [2022-03-20 14:02:51,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647280647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:51,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:51,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-20 14:02:51,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:51,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [370920421] [2022-03-20 14:02:51,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [370920421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:51,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:51,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 14:02:51,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627160551] [2022-03-20 14:02:51,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:51,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 14:02:51,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 14:02:51,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 14:02:51,612 INFO L87 Difference]: Start difference. First operand 344 states and 374 transitions. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 14:02:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:02:53,257 INFO L93 Difference]: Finished difference Result 373 states and 405 transitions. [2022-03-20 14:02:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 14:02:53,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 163 [2022-03-20 14:02:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:02:53,263 INFO L225 Difference]: With dead ends: 373 [2022-03-20 14:02:53,263 INFO L226 Difference]: Without dead ends: 367 [2022-03-20 14:02:53,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 14:02:53,265 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 69 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:02:53,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 196 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 14:02:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-03-20 14:02:53,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 364. [2022-03-20 14:02:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 289 states have (on average 1.1141868512110726) internal successors, (322), 289 states have internal predecessors, (322), 38 states have call successors, (38), 38 states have call predecessors, (38), 36 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 14:02:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 396 transitions. [2022-03-20 14:02:53,399 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 396 transitions. Word has length 163 [2022-03-20 14:02:53,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:02:53,400 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 396 transitions. [2022-03-20 14:02:53,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 14:02:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 396 transitions. [2022-03-20 14:02:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 14:02:53,401 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:02:53,401 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:02:53,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 14:02:53,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:53,615 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:02:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:02:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1420131853, now seen corresponding path program 29 times [2022-03-20 14:02:53,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:53,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1097927123] [2022-03-20 14:02:53,618 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:02:53,618 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:02:53,618 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:02:53,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1420131853, now seen corresponding path program 30 times [2022-03-20 14:02:53,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:02:53,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131849092] [2022-03-20 14:02:53,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:02:53,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:02:53,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:02:53,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34770621] [2022-03-20 14:02:53,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:02:53,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:02:53,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:02:53,628 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:02:53,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 14:02:53,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-03-20 14:02:53,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:02:53,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 14:02:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:02:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 32 proven. 1232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:02:56,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:02:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 32 proven. 752 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 14:02:59,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:02:59,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131849092] [2022-03-20 14:02:59,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:02:59,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34770621] [2022-03-20 14:02:59,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34770621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:02:59,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:02:59,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-20 14:02:59,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:02:59,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1097927123] [2022-03-20 14:02:59,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1097927123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:02:59,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:02:59,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 14:02:59,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537816768] [2022-03-20 14:02:59,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:02:59,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 14:02:59,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:02:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 14:02:59,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 14:02:59,998 INFO L87 Difference]: Start difference. First operand 364 states and 396 transitions. Second operand has 20 states, 20 states have (on average 6.85) internal successors, (137), 19 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:03:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:03:01,870 INFO L93 Difference]: Finished difference Result 393 states and 427 transitions. [2022-03-20 14:03:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 14:03:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.85) internal successors, (137), 19 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 173 [2022-03-20 14:03:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:03:01,871 INFO L225 Difference]: With dead ends: 393 [2022-03-20 14:03:01,872 INFO L226 Difference]: Without dead ends: 387 [2022-03-20 14:03:01,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:03:01,873 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:03:01,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 240 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 14:03:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-20 14:03:01,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 384. [2022-03-20 14:03:01,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 305 states have (on average 1.1147540983606556) internal successors, (340), 305 states have internal predecessors, (340), 40 states have call successors, (40), 40 states have call predecessors, (40), 38 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 14:03:01,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 418 transitions. [2022-03-20 14:03:01,982 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 418 transitions. Word has length 173 [2022-03-20 14:03:01,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:03:01,982 INFO L478 AbstractCegarLoop]: Abstraction has 384 states and 418 transitions. [2022-03-20 14:03:01,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.85) internal successors, (137), 19 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:03:01,982 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 418 transitions. [2022-03-20 14:03:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 14:03:01,983 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:03:01,983 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:03:02,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 14:03:02,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 14:03:02,201 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:03:02,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:03:02,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2097220685, now seen corresponding path program 31 times [2022-03-20 14:03:02,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:02,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [281957617] [2022-03-20 14:03:02,204 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:03:02,205 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:03:02,205 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:03:02,205 INFO L85 PathProgramCache]: Analyzing trace with hash 2097220685, now seen corresponding path program 32 times [2022-03-20 14:03:02,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:03:02,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104479115] [2022-03-20 14:03:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:03:02,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:03:02,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:03:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239073881] [2022-03-20 14:03:02,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:03:02,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:02,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:03:02,215 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:03:02,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 14:03:02,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:03:02,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:03:02,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 14:03:02,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:03:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 34 proven. 1394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:03:05,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:03:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 34 proven. 850 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 14:03:09,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:03:09,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104479115] [2022-03-20 14:03:09,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:03:09,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239073881] [2022-03-20 14:03:09,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239073881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:03:09,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:03:09,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-20 14:03:09,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:03:09,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [281957617] [2022-03-20 14:03:09,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [281957617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:03:09,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:03:09,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 14:03:09,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821125310] [2022-03-20 14:03:09,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:03:09,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 14:03:09,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:09,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 14:03:09,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 14:03:09,061 INFO L87 Difference]: Start difference. First operand 384 states and 418 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 14:03:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:03:11,017 INFO L93 Difference]: Finished difference Result 413 states and 449 transitions. [2022-03-20 14:03:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 14:03:11,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 183 [2022-03-20 14:03:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:03:11,018 INFO L225 Difference]: With dead ends: 413 [2022-03-20 14:03:11,018 INFO L226 Difference]: Without dead ends: 407 [2022-03-20 14:03:11,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 14:03:11,020 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 64 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:03:11,023 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 214 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 14:03:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-20 14:03:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 404. [2022-03-20 14:03:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 321 states have (on average 1.115264797507788) internal successors, (358), 321 states have internal predecessors, (358), 42 states have call successors, (42), 42 states have call predecessors, (42), 40 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 14:03:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 440 transitions. [2022-03-20 14:03:11,125 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 440 transitions. Word has length 183 [2022-03-20 14:03:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:03:11,125 INFO L478 AbstractCegarLoop]: Abstraction has 404 states and 440 transitions. [2022-03-20 14:03:11,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 14:03:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 440 transitions. [2022-03-20 14:03:11,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 14:03:11,127 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:03:11,127 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:03:11,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 14:03:11,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 14:03:11,343 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:03:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:03:11,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1139788429, now seen corresponding path program 33 times [2022-03-20 14:03:11,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:11,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67688549] [2022-03-20 14:03:11,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:03:11,347 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:03:11,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:03:11,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1139788429, now seen corresponding path program 34 times [2022-03-20 14:03:11,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:03:11,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545508534] [2022-03-20 14:03:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:03:11,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:03:11,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:03:11,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556687887] [2022-03-20 14:03:11,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:03:11,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:11,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:03:11,354 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:03:11,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 14:03:11,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:03:11,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:03:11,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 14:03:11,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:03:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 36 proven. 1566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:03:14,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:03:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 36 proven. 954 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 14:03:18,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:03:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545508534] [2022-03-20 14:03:18,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:03:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556687887] [2022-03-20 14:03:18,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556687887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:03:18,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:03:18,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-20 14:03:18,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:03:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67688549] [2022-03-20 14:03:18,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67688549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:03:18,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:03:18,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 14:03:18,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109188141] [2022-03-20 14:03:18,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:03:18,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 14:03:18,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:18,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 14:03:18,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 14:03:18,915 INFO L87 Difference]: Start difference. First operand 404 states and 440 transitions. Second operand has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 21 states have internal predecessors, (153), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 14:03:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:03:20,976 INFO L93 Difference]: Finished difference Result 433 states and 471 transitions. [2022-03-20 14:03:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 14:03:20,976 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 21 states have internal predecessors, (153), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 193 [2022-03-20 14:03:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:03:20,977 INFO L225 Difference]: With dead ends: 433 [2022-03-20 14:03:20,978 INFO L226 Difference]: Without dead ends: 427 [2022-03-20 14:03:20,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 14:03:20,979 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 77 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:03:20,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 237 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 14:03:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-03-20 14:03:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 424. [2022-03-20 14:03:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 337 states have (on average 1.1157270029673592) internal successors, (376), 337 states have internal predecessors, (376), 44 states have call successors, (44), 44 states have call predecessors, (44), 42 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 14:03:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 462 transitions. [2022-03-20 14:03:21,107 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 462 transitions. Word has length 193 [2022-03-20 14:03:21,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:03:21,108 INFO L478 AbstractCegarLoop]: Abstraction has 424 states and 462 transitions. [2022-03-20 14:03:21,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 21 states have internal predecessors, (153), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 14:03:21,108 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 462 transitions. [2022-03-20 14:03:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 14:03:21,109 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:03:21,109 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:03:21,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 14:03:21,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 14:03:21,324 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:03:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:03:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1355433779, now seen corresponding path program 35 times [2022-03-20 14:03:21,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:21,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [389745821] [2022-03-20 14:03:21,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:03:21,326 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:03:21,326 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:03:21,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1355433779, now seen corresponding path program 36 times [2022-03-20 14:03:21,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:03:21,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91199189] [2022-03-20 14:03:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:03:21,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:03:21,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:03:21,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180519079] [2022-03-20 14:03:21,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:03:21,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:21,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:03:21,333 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:03:21,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 14:03:21,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-03-20 14:03:21,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:03:21,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 14:03:21,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:03:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 38 proven. 1748 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:03:24,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:03:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 38 proven. 1064 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-20 14:03:29,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:03:29,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91199189] [2022-03-20 14:03:29,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:03:29,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180519079] [2022-03-20 14:03:29,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180519079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:03:29,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:03:29,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-20 14:03:29,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:03:29,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [389745821] [2022-03-20 14:03:29,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [389745821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:03:29,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:03:29,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 14:03:29,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031365669] [2022-03-20 14:03:29,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:03:29,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 14:03:29,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:29,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 14:03:29,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 14:03:29,671 INFO L87 Difference]: Start difference. First operand 424 states and 462 transitions. Second operand has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 14:03:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:03:32,008 INFO L93 Difference]: Finished difference Result 453 states and 493 transitions. [2022-03-20 14:03:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 14:03:32,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 203 [2022-03-20 14:03:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:03:32,010 INFO L225 Difference]: With dead ends: 453 [2022-03-20 14:03:32,010 INFO L226 Difference]: Without dead ends: 447 [2022-03-20 14:03:32,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 14:03:32,011 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 104 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:03:32,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 253 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 14:03:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-03-20 14:03:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 444. [2022-03-20 14:03:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 353 states have (on average 1.1161473087818696) internal successors, (394), 353 states have internal predecessors, (394), 46 states have call successors, (46), 46 states have call predecessors, (46), 44 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 14:03:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 484 transitions. [2022-03-20 14:03:32,138 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 484 transitions. Word has length 203 [2022-03-20 14:03:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:03:32,138 INFO L478 AbstractCegarLoop]: Abstraction has 444 states and 484 transitions. [2022-03-20 14:03:32,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 14:03:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 484 transitions. [2022-03-20 14:03:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-20 14:03:32,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:03:32,139 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:03:32,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 14:03:32,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 14:03:32,357 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:03:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:03:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1603720973, now seen corresponding path program 37 times [2022-03-20 14:03:32,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:32,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [603745936] [2022-03-20 14:03:32,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:03:32,360 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:03:32,360 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:03:32,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1603720973, now seen corresponding path program 38 times [2022-03-20 14:03:32,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:03:32,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17851200] [2022-03-20 14:03:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:03:32,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:03:32,368 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:03:32,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081601283] [2022-03-20 14:03:32,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:03:32,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:32,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:03:32,370 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:03:32,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 14:03:32,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:03:32,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:03:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 14:03:32,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:03:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 40 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:03:35,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:03:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 40 proven. 1180 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-20 14:03:41,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:03:41,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17851200] [2022-03-20 14:03:41,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:03:41,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081601283] [2022-03-20 14:03:41,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081601283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:03:41,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:03:41,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-20 14:03:41,319 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:03:41,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [603745936] [2022-03-20 14:03:41,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [603745936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:03:41,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:03:41,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 14:03:41,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023032995] [2022-03-20 14:03:41,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:03:41,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 14:03:41,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:41,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 14:03:41,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 14:03:41,320 INFO L87 Difference]: Start difference. First operand 444 states and 484 transitions. Second operand has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 23 states have internal predecessors, (169), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 14:03:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:03:43,734 INFO L93 Difference]: Finished difference Result 473 states and 515 transitions. [2022-03-20 14:03:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 14:03:43,734 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 23 states have internal predecessors, (169), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 213 [2022-03-20 14:03:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:03:43,736 INFO L225 Difference]: With dead ends: 473 [2022-03-20 14:03:43,736 INFO L226 Difference]: Without dead ends: 467 [2022-03-20 14:03:43,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 14:03:43,737 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 74 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:03:43,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 248 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 14:03:43,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-03-20 14:03:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 464. [2022-03-20 14:03:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 369 states have (on average 1.1165311653116532) internal successors, (412), 369 states have internal predecessors, (412), 48 states have call successors, (48), 48 states have call predecessors, (48), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 14:03:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 506 transitions. [2022-03-20 14:03:43,900 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 506 transitions. Word has length 213 [2022-03-20 14:03:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:03:43,901 INFO L478 AbstractCegarLoop]: Abstraction has 464 states and 506 transitions. [2022-03-20 14:03:43,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 23 states have internal predecessors, (169), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 14:03:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 506 transitions. [2022-03-20 14:03:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-03-20 14:03:43,902 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:03:43,902 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:03:43,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 14:03:44,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:44,119 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:03:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:03:44,119 INFO L85 PathProgramCache]: Analyzing trace with hash -791206579, now seen corresponding path program 39 times [2022-03-20 14:03:44,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:44,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1043300293] [2022-03-20 14:03:44,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:03:44,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:03:44,122 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:03:44,122 INFO L85 PathProgramCache]: Analyzing trace with hash -791206579, now seen corresponding path program 40 times [2022-03-20 14:03:44,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:03:44,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483841040] [2022-03-20 14:03:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:03:44,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:03:44,136 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:03:44,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136971865] [2022-03-20 14:03:44,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:03:44,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:44,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:03:44,140 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:03:44,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 14:03:44,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:03:44,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:03:44,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 14:03:44,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:03:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2184 backedges. 42 proven. 2142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:03:47,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:03:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2184 backedges. 42 proven. 1302 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-20 14:03:53,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:03:53,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483841040] [2022-03-20 14:03:53,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:03:53,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136971865] [2022-03-20 14:03:53,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136971865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:03:53,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:03:53,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-20 14:03:53,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:03:53,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1043300293] [2022-03-20 14:03:53,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1043300293] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:03:53,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:03:53,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 14:03:53,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25902000] [2022-03-20 14:03:53,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:03:53,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 14:03:53,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:53,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 14:03:53,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 14:03:53,450 INFO L87 Difference]: Start difference. First operand 464 states and 506 transitions. Second operand has 25 states, 25 states have (on average 7.08) internal successors, (177), 24 states have internal predecessors, (177), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 14:03:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:03:56,033 INFO L93 Difference]: Finished difference Result 493 states and 537 transitions. [2022-03-20 14:03:56,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 14:03:56,033 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.08) internal successors, (177), 24 states have internal predecessors, (177), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 223 [2022-03-20 14:03:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:03:56,035 INFO L225 Difference]: With dead ends: 493 [2022-03-20 14:03:56,035 INFO L226 Difference]: Without dead ends: 487 [2022-03-20 14:03:56,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 14:03:56,036 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 14:03:56,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 264 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 14:03:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-03-20 14:03:56,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 484. [2022-03-20 14:03:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 385 states have (on average 1.1168831168831168) internal successors, (430), 385 states have internal predecessors, (430), 50 states have call successors, (50), 50 states have call predecessors, (50), 48 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-20 14:03:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 528 transitions. [2022-03-20 14:03:56,170 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 528 transitions. Word has length 223 [2022-03-20 14:03:56,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:03:56,171 INFO L478 AbstractCegarLoop]: Abstraction has 484 states and 528 transitions. [2022-03-20 14:03:56,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.08) internal successors, (177), 24 states have internal predecessors, (177), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 14:03:56,171 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 528 transitions. [2022-03-20 14:03:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-20 14:03:56,172 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:03:56,172 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:03:56,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 14:03:56,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:56,387 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:03:56,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:03:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1715821683, now seen corresponding path program 41 times [2022-03-20 14:03:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:03:56,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1493718108] [2022-03-20 14:03:56,390 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:03:56,390 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:03:56,390 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:03:56,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1715821683, now seen corresponding path program 42 times [2022-03-20 14:03:56,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:03:56,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920977936] [2022-03-20 14:03:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:03:56,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:03:56,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:03:56,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054043851] [2022-03-20 14:03:56,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:03:56,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:03:56,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:03:56,398 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:03:56,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 14:03:56,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-03-20 14:03:56,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:03:56,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 14:03:56,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:04:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 44 proven. 2354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:04:00,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:04:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 44 proven. 1430 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-20 14:04:06,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:04:06,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920977936] [2022-03-20 14:04:06,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:04:06,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054043851] [2022-03-20 14:04:06,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054043851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:04:06,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:04:06,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 14:04:06,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:04:06,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1493718108] [2022-03-20 14:04:06,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1493718108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:04:06,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:04:06,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 14:04:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549695509] [2022-03-20 14:04:06,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:04:06,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 14:04:06,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 14:04:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 14:04:06,684 INFO L87 Difference]: Start difference. First operand 484 states and 528 transitions. Second operand has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 25 states have internal predecessors, (185), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 14:04:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:04:09,484 INFO L93 Difference]: Finished difference Result 513 states and 559 transitions. [2022-03-20 14:04:09,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 14:04:09,485 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 25 states have internal predecessors, (185), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 233 [2022-03-20 14:04:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:04:09,486 INFO L225 Difference]: With dead ends: 513 [2022-03-20 14:04:09,486 INFO L226 Difference]: Without dead ends: 507 [2022-03-20 14:04:09,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 14:04:09,487 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 98 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:04:09,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 259 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 14:04:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-20 14:04:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 504. [2022-03-20 14:04:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 401 states have (on average 1.1172069825436408) internal successors, (448), 401 states have internal predecessors, (448), 52 states have call successors, (52), 52 states have call predecessors, (52), 50 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-20 14:04:09,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 550 transitions. [2022-03-20 14:04:09,630 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 550 transitions. Word has length 233 [2022-03-20 14:04:09,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:04:09,630 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 550 transitions. [2022-03-20 14:04:09,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 25 states have internal predecessors, (185), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 14:04:09,631 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 550 transitions. [2022-03-20 14:04:09,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-03-20 14:04:09,632 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:04:09,632 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:04:09,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 14:04:09,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-20 14:04:09,838 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:04:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:04:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1408937523, now seen corresponding path program 43 times [2022-03-20 14:04:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:09,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1242889101] [2022-03-20 14:04:09,841 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:04:09,841 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:04:09,841 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:04:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1408937523, now seen corresponding path program 44 times [2022-03-20 14:04:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:04:09,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361130465] [2022-03-20 14:04:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:04:09,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:04:09,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:04:09,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796063577] [2022-03-20 14:04:09,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:04:09,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:04:09,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:04:09,849 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:04:09,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 14:04:09,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:04:09,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:04:09,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 14:04:09,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:04:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 46 proven. 2576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:04:13,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:04:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 46 proven. 1564 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-20 14:04:20,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:04:20,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361130465] [2022-03-20 14:04:20,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:04:20,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796063577] [2022-03-20 14:04:20,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796063577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:04:20,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:04:20,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-03-20 14:04:20,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:04:20,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1242889101] [2022-03-20 14:04:20,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1242889101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:04:20,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:04:20,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 14:04:20,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514779500] [2022-03-20 14:04:20,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:04:20,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 14:04:20,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:20,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 14:04:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 14:04:20,479 INFO L87 Difference]: Start difference. First operand 504 states and 550 transitions. Second operand has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 26 states have internal predecessors, (193), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 14:04:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:04:23,468 INFO L93 Difference]: Finished difference Result 533 states and 581 transitions. [2022-03-20 14:04:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 14:04:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 26 states have internal predecessors, (193), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 243 [2022-03-20 14:04:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:04:23,470 INFO L225 Difference]: With dead ends: 533 [2022-03-20 14:04:23,470 INFO L226 Difference]: Without dead ends: 527 [2022-03-20 14:04:23,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 14:04:23,471 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 14:04:23,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 282 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 14:04:23,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-20 14:04:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 524. [2022-03-20 14:04:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 417 states have (on average 1.1175059952038369) internal successors, (466), 417 states have internal predecessors, (466), 54 states have call successors, (54), 54 states have call predecessors, (54), 52 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 14:04:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 572 transitions. [2022-03-20 14:04:23,633 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 572 transitions. Word has length 243 [2022-03-20 14:04:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:04:23,633 INFO L478 AbstractCegarLoop]: Abstraction has 524 states and 572 transitions. [2022-03-20 14:04:23,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 26 states have internal predecessors, (193), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 14:04:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 572 transitions. [2022-03-20 14:04:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-03-20 14:04:23,635 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:04:23,635 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:04:23,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 14:04:23,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 14:04:23,851 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:04:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:04:23,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1803866099, now seen corresponding path program 45 times [2022-03-20 14:04:23,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:23,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [176724384] [2022-03-20 14:04:23,855 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:04:23,855 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:04:23,855 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:04:23,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1803866099, now seen corresponding path program 46 times [2022-03-20 14:04:23,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:04:23,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164984140] [2022-03-20 14:04:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:04:23,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:04:23,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:04:23,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515812159] [2022-03-20 14:04:23,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:04:23,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:04:23,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:04:23,872 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:04:23,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 14:04:23,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:04:23,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:04:23,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 14:04:23,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:04:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2856 backedges. 48 proven. 2808 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:04:28,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:04:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2856 backedges. 48 proven. 1704 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-20 14:04:35,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:04:35,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164984140] [2022-03-20 14:04:35,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:04:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515812159] [2022-03-20 14:04:35,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515812159] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:04:35,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:04:35,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-03-20 14:04:35,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:04:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [176724384] [2022-03-20 14:04:35,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [176724384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:04:35,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:04:35,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 14:04:35,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279306068] [2022-03-20 14:04:35,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:04:35,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 14:04:35,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:35,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 14:04:35,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 14:04:35,219 INFO L87 Difference]: Start difference. First operand 524 states and 572 transitions. Second operand has 28 states, 28 states have (on average 7.178571428571429) internal successors, (201), 27 states have internal predecessors, (201), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 14:04:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:04:38,538 INFO L93 Difference]: Finished difference Result 553 states and 603 transitions. [2022-03-20 14:04:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 14:04:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.178571428571429) internal successors, (201), 27 states have internal predecessors, (201), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 253 [2022-03-20 14:04:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:04:38,541 INFO L225 Difference]: With dead ends: 553 [2022-03-20 14:04:38,541 INFO L226 Difference]: Without dead ends: 547 [2022-03-20 14:04:38,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 14:04:38,541 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 83 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 14:04:38,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 284 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 14:04:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-03-20 14:04:38,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 544. [2022-03-20 14:04:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 433 states have (on average 1.117782909930716) internal successors, (484), 433 states have internal predecessors, (484), 56 states have call successors, (56), 56 states have call predecessors, (56), 54 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 14:04:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 594 transitions. [2022-03-20 14:04:38,697 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 594 transitions. Word has length 253 [2022-03-20 14:04:38,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:04:38,697 INFO L478 AbstractCegarLoop]: Abstraction has 544 states and 594 transitions. [2022-03-20 14:04:38,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.178571428571429) internal successors, (201), 27 states have internal predecessors, (201), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 14:04:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 594 transitions. [2022-03-20 14:04:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-03-20 14:04:38,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:04:38,699 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:04:38,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 14:04:38,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 14:04:38,906 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:04:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:04:38,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1159709107, now seen corresponding path program 47 times [2022-03-20 14:04:38,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:38,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1131107413] [2022-03-20 14:04:38,909 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:04:38,909 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:04:38,909 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:04:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1159709107, now seen corresponding path program 48 times [2022-03-20 14:04:38,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:04:38,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563218663] [2022-03-20 14:04:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:04:38,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:04:38,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:04:38,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468712301] [2022-03-20 14:04:38,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:04:38,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:04:38,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:04:38,916 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:04:38,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 14:04:39,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-03-20 14:04:39,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:04:39,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 14:04:39,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:04:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 50 proven. 3050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:04:43,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:04:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 50 proven. 1850 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-03-20 14:04:50,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:04:50,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563218663] [2022-03-20 14:04:50,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:04:50,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468712301] [2022-03-20 14:04:50,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468712301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:04:50,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:04:50,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2022-03-20 14:04:50,395 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:04:50,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1131107413] [2022-03-20 14:04:50,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1131107413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:04:50,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:04:50,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 14:04:50,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775768767] [2022-03-20 14:04:50,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:04:50,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 14:04:50,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:50,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 14:04:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 14:04:50,396 INFO L87 Difference]: Start difference. First operand 544 states and 594 transitions. Second operand has 29 states, 29 states have (on average 7.206896551724138) internal successors, (209), 28 states have internal predecessors, (209), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 14:04:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:04:53,617 INFO L93 Difference]: Finished difference Result 573 states and 625 transitions. [2022-03-20 14:04:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 14:04:53,617 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.206896551724138) internal successors, (209), 28 states have internal predecessors, (209), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 263 [2022-03-20 14:04:53,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:04:53,619 INFO L225 Difference]: With dead ends: 573 [2022-03-20 14:04:53,619 INFO L226 Difference]: Without dead ends: 567 [2022-03-20 14:04:53,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2811, Invalid=3669, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 14:04:53,620 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 101 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 14:04:53,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 293 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 14:04:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-20 14:04:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 564. [2022-03-20 14:04:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 449 states have (on average 1.1180400890868596) internal successors, (502), 449 states have internal predecessors, (502), 58 states have call successors, (58), 58 states have call predecessors, (58), 56 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-20 14:04:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 616 transitions. [2022-03-20 14:04:53,789 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 616 transitions. Word has length 263 [2022-03-20 14:04:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:04:53,789 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 616 transitions. [2022-03-20 14:04:53,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.206896551724138) internal successors, (209), 28 states have internal predecessors, (209), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 14:04:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 616 transitions. [2022-03-20 14:04:53,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-03-20 14:04:53,790 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:04:53,790 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:04:53,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-20 14:04:54,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:04:54,009 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:04:54,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:04:54,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1577550707, now seen corresponding path program 49 times [2022-03-20 14:04:54,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:04:54,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [949325702] [2022-03-20 14:04:54,012 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:04:54,012 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:04:54,012 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:04:54,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1577550707, now seen corresponding path program 50 times [2022-03-20 14:04:54,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:04:54,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241455305] [2022-03-20 14:04:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:04:54,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:04:54,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:04:54,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053440166] [2022-03-20 14:04:54,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:04:54,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:04:54,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:04:54,020 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:04:54,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 14:04:54,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:04:54,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:04:54,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 14:04:54,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:04:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3354 backedges. 52 proven. 3302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:04:58,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:05:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3354 backedges. 52 proven. 2002 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-20 14:05:06,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:06,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241455305] [2022-03-20 14:05:06,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:06,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053440166] [2022-03-20 14:05:06,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053440166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:05:06,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:05:06,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-03-20 14:05:06,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:06,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [949325702] [2022-03-20 14:05:06,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [949325702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:06,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:06,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 14:05:06,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796237671] [2022-03-20 14:05:06,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:06,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 14:05:06,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:06,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 14:05:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 14:05:06,043 INFO L87 Difference]: Start difference. First operand 564 states and 616 transitions. Second operand has 30 states, 30 states have (on average 7.233333333333333) internal successors, (217), 29 states have internal predecessors, (217), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 14:05:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:09,429 INFO L93 Difference]: Finished difference Result 593 states and 647 transitions. [2022-03-20 14:05:09,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 14:05:09,429 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 7.233333333333333) internal successors, (217), 29 states have internal predecessors, (217), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 273 [2022-03-20 14:05:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:09,431 INFO L225 Difference]: With dead ends: 593 [2022-03-20 14:05:09,431 INFO L226 Difference]: Without dead ends: 587 [2022-03-20 14:05:09,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3027, Invalid=3945, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 14:05:09,432 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 114 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:09,432 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 295 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 14:05:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-03-20 14:05:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 584. [2022-03-20 14:05:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 465 states have (on average 1.118279569892473) internal successors, (520), 465 states have internal predecessors, (520), 60 states have call successors, (60), 60 states have call predecessors, (60), 58 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-20 14:05:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 638 transitions. [2022-03-20 14:05:09,607 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 638 transitions. Word has length 273 [2022-03-20 14:05:09,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:09,607 INFO L478 AbstractCegarLoop]: Abstraction has 584 states and 638 transitions. [2022-03-20 14:05:09,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.233333333333333) internal successors, (217), 29 states have internal predecessors, (217), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 14:05:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 638 transitions. [2022-03-20 14:05:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-03-20 14:05:09,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:09,628 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:09,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 14:05:09,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-20 14:05:09,831 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash 663218893, now seen corresponding path program 51 times [2022-03-20 14:05:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:09,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123936328] [2022-03-20 14:05:09,834 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:05:09,834 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:05:09,834 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:05:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash 663218893, now seen corresponding path program 52 times [2022-03-20 14:05:09,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:09,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186912460] [2022-03-20 14:05:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:09,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:09,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:09,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413916541] [2022-03-20 14:05:09,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:05:09,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:09,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:09,852 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:05:09,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 14:05:09,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:05:09,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:09,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 14:05:09,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 54 proven. 3564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:05:14,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:05:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 54 proven. 2160 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-20 14:05:22,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:22,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186912460] [2022-03-20 14:05:22,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:22,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413916541] [2022-03-20 14:05:22,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413916541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:05:22,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:05:22,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-03-20 14:05:22,546 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:22,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123936328] [2022-03-20 14:05:22,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123936328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:22,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:22,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 14:05:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323251878] [2022-03-20 14:05:22,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:22,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 14:05:22,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 14:05:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 14:05:22,547 INFO L87 Difference]: Start difference. First operand 584 states and 638 transitions. Second operand has 31 states, 31 states have (on average 7.258064516129032) internal successors, (225), 30 states have internal predecessors, (225), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 14:05:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:26,170 INFO L93 Difference]: Finished difference Result 613 states and 669 transitions. [2022-03-20 14:05:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 14:05:26,171 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 7.258064516129032) internal successors, (225), 30 states have internal predecessors, (225), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 283 [2022-03-20 14:05:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:26,172 INFO L225 Difference]: With dead ends: 613 [2022-03-20 14:05:26,172 INFO L226 Difference]: Without dead ends: 607 [2022-03-20 14:05:26,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=3251, Invalid=4231, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 14:05:26,173 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 129 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:26,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 311 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 14:05:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-03-20 14:05:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 604. [2022-03-20 14:05:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 481 states have (on average 1.1185031185031185) internal successors, (538), 481 states have internal predecessors, (538), 62 states have call successors, (62), 62 states have call predecessors, (62), 60 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-20 14:05:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 660 transitions. [2022-03-20 14:05:26,361 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 660 transitions. Word has length 283 [2022-03-20 14:05:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:26,361 INFO L478 AbstractCegarLoop]: Abstraction has 604 states and 660 transitions. [2022-03-20 14:05:26,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.258064516129032) internal successors, (225), 30 states have internal predecessors, (225), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 14:05:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 660 transitions. [2022-03-20 14:05:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-20 14:05:26,363 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:26,363 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:26,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 14:05:26,580 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 14:05:26,580 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:26,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1001223923, now seen corresponding path program 53 times [2022-03-20 14:05:26,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:26,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [289115540] [2022-03-20 14:05:26,584 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:05:26,584 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:05:26,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:05:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1001223923, now seen corresponding path program 54 times [2022-03-20 14:05:26,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:26,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452832341] [2022-03-20 14:05:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:26,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:26,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:26,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105660646] [2022-03-20 14:05:26,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:05:26,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:26,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:26,593 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:05:26,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 14:05:27,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-03-20 14:05:27,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:27,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 14:05:27,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 56 proven. 3836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:05:32,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:05:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 56 proven. 2324 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-03-20 14:05:40,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:40,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452832341] [2022-03-20 14:05:40,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:40,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105660646] [2022-03-20 14:05:40,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105660646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:05:40,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:05:40,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2022-03-20 14:05:40,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:40,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [289115540] [2022-03-20 14:05:40,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [289115540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:40,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:40,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 14:05:40,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955874143] [2022-03-20 14:05:40,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:40,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 14:05:40,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:40,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 14:05:40,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 14:05:40,474 INFO L87 Difference]: Start difference. First operand 604 states and 660 transitions. Second operand has 32 states, 32 states have (on average 7.28125) internal successors, (233), 31 states have internal predecessors, (233), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 14:05:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:44,467 INFO L93 Difference]: Finished difference Result 633 states and 691 transitions. [2022-03-20 14:05:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 14:05:44,467 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 7.28125) internal successors, (233), 31 states have internal predecessors, (233), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 293 [2022-03-20 14:05:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:44,469 INFO L225 Difference]: With dead ends: 633 [2022-03-20 14:05:44,469 INFO L226 Difference]: Without dead ends: 627 [2022-03-20 14:05:44,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=3483, Invalid=4527, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 14:05:44,470 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 86 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:44,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 369 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 14:05:44,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-03-20 14:05:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 624. [2022-03-20 14:05:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 497 states have (on average 1.118712273641851) internal successors, (556), 497 states have internal predecessors, (556), 64 states have call successors, (64), 64 states have call predecessors, (64), 62 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-03-20 14:05:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 682 transitions. [2022-03-20 14:05:44,648 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 682 transitions. Word has length 293 [2022-03-20 14:05:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:44,648 INFO L478 AbstractCegarLoop]: Abstraction has 624 states and 682 transitions. [2022-03-20 14:05:44,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.28125) internal successors, (233), 31 states have internal predecessors, (233), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 14:05:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 682 transitions. [2022-03-20 14:05:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-03-20 14:05:44,649 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:44,649 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:44,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 14:05:44,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 14:05:44,856 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash -870557875, now seen corresponding path program 55 times [2022-03-20 14:05:44,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:44,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2098178352] [2022-03-20 14:05:44,859 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:05:44,859 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:05:44,859 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:05:44,859 INFO L85 PathProgramCache]: Analyzing trace with hash -870557875, now seen corresponding path program 56 times [2022-03-20 14:05:44,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:44,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921974989] [2022-03-20 14:05:44,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:44,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:44,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:44,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35698606] [2022-03-20 14:05:44,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:05:44,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:44,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:44,867 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:05:44,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 14:05:44,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:05:44,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:44,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 14:05:44,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 58 proven. 4118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:05:50,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:05:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 58 proven. 2494 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-03-20 14:05:58,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:58,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921974989] [2022-03-20 14:05:58,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:58,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35698606] [2022-03-20 14:05:58,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35698606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:05:58,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:05:58,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2022-03-20 14:05:58,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:58,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2098178352] [2022-03-20 14:05:58,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2098178352] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:58,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:58,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 14:05:58,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040455941] [2022-03-20 14:05:58,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:58,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 14:05:58,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 14:05:58,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 14:05:58,853 INFO L87 Difference]: Start difference. First operand 624 states and 682 transitions. Second operand has 33 states, 33 states have (on average 7.303030303030303) internal successors, (241), 32 states have internal predecessors, (241), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 14:06:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:06:02,823 INFO L93 Difference]: Finished difference Result 653 states and 713 transitions. [2022-03-20 14:06:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 14:06:02,823 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 7.303030303030303) internal successors, (241), 32 states have internal predecessors, (241), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 303 [2022-03-20 14:06:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:06:02,825 INFO L225 Difference]: With dead ends: 653 [2022-03-20 14:06:02,825 INFO L226 Difference]: Without dead ends: 647 [2022-03-20 14:06:02,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=3723, Invalid=4833, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 14:06:02,826 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 116 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 14:06:02,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 343 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 14:06:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-03-20 14:06:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 644. [2022-03-20 14:06:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 513 states have (on average 1.1189083820662769) internal successors, (574), 513 states have internal predecessors, (574), 66 states have call successors, (66), 66 states have call predecessors, (66), 64 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-20 14:06:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 704 transitions. [2022-03-20 14:06:03,012 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 704 transitions. Word has length 303 [2022-03-20 14:06:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:06:03,012 INFO L478 AbstractCegarLoop]: Abstraction has 644 states and 704 transitions. [2022-03-20 14:06:03,012 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.303030303030303) internal successors, (241), 32 states have internal predecessors, (241), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 14:06:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 704 transitions. [2022-03-20 14:06:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-03-20 14:06:03,013 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:06:03,014 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:06:03,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 14:06:03,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-20 14:06:03,227 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:06:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:06:03,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1381411443, now seen corresponding path program 57 times [2022-03-20 14:06:03,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:06:03,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [930979439] [2022-03-20 14:06:03,238 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:06:03,238 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:06:03,238 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:06:03,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1381411443, now seen corresponding path program 58 times [2022-03-20 14:06:03,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:06:03,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040883365] [2022-03-20 14:06:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:06:03,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:06:03,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:06:03,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533188660] [2022-03-20 14:06:03,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:06:03,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:06:03,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:06:03,246 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:06:03,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 14:06:03,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:06:03,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:06:03,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 14:06:03,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:06:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 60 proven. 4410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:06:08,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:06:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 60 proven. 2670 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-03-20 14:06:18,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:06:18,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040883365] [2022-03-20 14:06:18,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:06:18,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533188660] [2022-03-20 14:06:18,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533188660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:06:18,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:06:18,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-03-20 14:06:18,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:06:18,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [930979439] [2022-03-20 14:06:18,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [930979439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:06:18,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:06:18,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 14:06:18,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961295446] [2022-03-20 14:06:18,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:06:18,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 14:06:18,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:06:18,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 14:06:18,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 14:06:18,253 INFO L87 Difference]: Start difference. First operand 644 states and 704 transitions. Second operand has 34 states, 34 states have (on average 7.323529411764706) internal successors, (249), 33 states have internal predecessors, (249), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 14:06:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:06:22,483 INFO L93 Difference]: Finished difference Result 673 states and 735 transitions. [2022-03-20 14:06:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 14:06:22,483 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 7.323529411764706) internal successors, (249), 33 states have internal predecessors, (249), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 313 [2022-03-20 14:06:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:06:22,485 INFO L225 Difference]: With dead ends: 673 [2022-03-20 14:06:22,485 INFO L226 Difference]: Without dead ends: 667 [2022-03-20 14:06:22,486 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=3971, Invalid=5149, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 14:06:22,486 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 127 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 14:06:22,486 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 345 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 14:06:22,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-20 14:06:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 664. [2022-03-20 14:06:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 529 states have (on average 1.1190926275992439) internal successors, (592), 529 states have internal predecessors, (592), 68 states have call successors, (68), 68 states have call predecessors, (68), 66 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-03-20 14:06:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 726 transitions. [2022-03-20 14:06:22,689 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 726 transitions. Word has length 313 [2022-03-20 14:06:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:06:22,689 INFO L478 AbstractCegarLoop]: Abstraction has 664 states and 726 transitions. [2022-03-20 14:06:22,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.323529411764706) internal successors, (249), 33 states have internal predecessors, (249), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 14:06:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 726 transitions. [2022-03-20 14:06:22,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-03-20 14:06:22,690 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:06:22,691 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:06:22,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 14:06:22,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:06:22,897 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:06:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:06:22,897 INFO L85 PathProgramCache]: Analyzing trace with hash 851280845, now seen corresponding path program 59 times [2022-03-20 14:06:22,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:06:22,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [445974472] [2022-03-20 14:06:22,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:06:22,900 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:06:22,900 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:06:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash 851280845, now seen corresponding path program 60 times [2022-03-20 14:06:22,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:06:22,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380293143] [2022-03-20 14:06:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:06:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:06:22,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:06:22,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653274430] [2022-03-20 14:06:22,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:06:22,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:06:22,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:06:22,909 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:06:22,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 14:06:23,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2022-03-20 14:06:23,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:06:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 14:06:23,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:06:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 62 proven. 4712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:06:29,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:06:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 62 proven. 2852 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-20 14:06:38,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:06:38,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380293143] [2022-03-20 14:06:38,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:06:38,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653274430] [2022-03-20 14:06:38,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653274430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:06:38,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:06:38,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2022-03-20 14:06:38,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:06:38,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [445974472] [2022-03-20 14:06:38,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [445974472] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:06:38,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:06:38,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 14:06:38,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695268667] [2022-03-20 14:06:38,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:06:38,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 14:06:38,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:06:38,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 14:06:38,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 14:06:38,988 INFO L87 Difference]: Start difference. First operand 664 states and 726 transitions. Second operand has 35 states, 35 states have (on average 7.3428571428571425) internal successors, (257), 34 states have internal predecessors, (257), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 14:06:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:06:43,478 INFO L93 Difference]: Finished difference Result 693 states and 757 transitions. [2022-03-20 14:06:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 14:06:43,479 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 7.3428571428571425) internal successors, (257), 34 states have internal predecessors, (257), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 323 [2022-03-20 14:06:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:06:43,481 INFO L225 Difference]: With dead ends: 693 [2022-03-20 14:06:43,481 INFO L226 Difference]: Without dead ends: 687 [2022-03-20 14:06:43,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=4227, Invalid=5475, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 14:06:43,482 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 140 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 14:06:43,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 347 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 14:06:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-03-20 14:06:43,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 684. [2022-03-20 14:06:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 545 states have (on average 1.1192660550458715) internal successors, (610), 545 states have internal predecessors, (610), 70 states have call successors, (70), 70 states have call predecessors, (70), 68 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-03-20 14:06:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 748 transitions. [2022-03-20 14:06:43,691 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 748 transitions. Word has length 323 [2022-03-20 14:06:43,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:06:43,691 INFO L478 AbstractCegarLoop]: Abstraction has 684 states and 748 transitions. [2022-03-20 14:06:43,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.3428571428571425) internal successors, (257), 34 states have internal predecessors, (257), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 14:06:43,692 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 748 transitions. [2022-03-20 14:06:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-03-20 14:06:43,693 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:06:43,693 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:06:43,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 14:06:43,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-20 14:06:43,899 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:06:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:06:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1071848947, now seen corresponding path program 61 times [2022-03-20 14:06:43,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:06:43,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [987141818] [2022-03-20 14:06:43,902 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:06:43,902 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:06:43,902 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:06:43,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1071848947, now seen corresponding path program 62 times [2022-03-20 14:06:43,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:06:43,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075612534] [2022-03-20 14:06:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:06:43,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:06:43,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:06:43,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6877423] [2022-03-20 14:06:43,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:06:43,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:06:43,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:06:43,910 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:06:43,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 14:06:44,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:06:44,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:06:44,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 14:06:44,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:06:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5088 backedges. 64 proven. 5024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:06:50,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:07:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5088 backedges. 64 proven. 3040 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-20 14:07:01,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:07:01,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075612534] [2022-03-20 14:07:01,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:07:01,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6877423] [2022-03-20 14:07:01,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6877423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:07:01,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:07:01,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2022-03-20 14:07:01,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:07:01,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [987141818] [2022-03-20 14:07:01,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [987141818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:01,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:01,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 14:07:01,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168608750] [2022-03-20 14:07:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:07:01,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 14:07:01,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 14:07:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 14:07:01,056 INFO L87 Difference]: Start difference. First operand 684 states and 748 transitions. Second operand has 36 states, 36 states have (on average 7.361111111111111) internal successors, (265), 35 states have internal predecessors, (265), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 14:07:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:07:05,795 INFO L93 Difference]: Finished difference Result 713 states and 779 transitions. [2022-03-20 14:07:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 14:07:05,796 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 7.361111111111111) internal successors, (265), 35 states have internal predecessors, (265), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 333 [2022-03-20 14:07:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:07:05,797 INFO L225 Difference]: With dead ends: 713 [2022-03-20 14:07:05,798 INFO L226 Difference]: Without dead ends: 707 [2022-03-20 14:07:05,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=4491, Invalid=5811, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 14:07:05,807 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 139 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:07:05,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 356 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 14:07:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-03-20 14:07:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 704. [2022-03-20 14:07:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 561 states have (on average 1.1194295900178253) internal successors, (628), 561 states have internal predecessors, (628), 72 states have call successors, (72), 72 states have call predecessors, (72), 70 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-03-20 14:07:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 770 transitions. [2022-03-20 14:07:06,012 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 770 transitions. Word has length 333 [2022-03-20 14:07:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:07:06,013 INFO L478 AbstractCegarLoop]: Abstraction has 704 states and 770 transitions. [2022-03-20 14:07:06,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.361111111111111) internal successors, (265), 35 states have internal predecessors, (265), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 14:07:06,013 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 770 transitions. [2022-03-20 14:07:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-03-20 14:07:06,014 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:07:06,014 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:07:06,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 14:07:06,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:07:06,231 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:07:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:07:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1786023859, now seen corresponding path program 63 times [2022-03-20 14:07:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:06,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [227643773] [2022-03-20 14:07:06,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:07:06,234 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:07:06,234 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:07:06,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1786023859, now seen corresponding path program 64 times [2022-03-20 14:07:06,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:07:06,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261648120] [2022-03-20 14:07:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:07:06,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:07:06,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:07:06,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250556480] [2022-03-20 14:07:06,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:07:06,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:07:06,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:07:06,243 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:07:06,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 14:07:06,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:07:06,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:07:06,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 14:07:06,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:07:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 66 proven. 5346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:07:12,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:07:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 66 proven. 3234 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-20 14:07:23,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:07:23,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261648120] [2022-03-20 14:07:23,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:07:23,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250556480] [2022-03-20 14:07:23,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250556480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:07:23,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:07:23,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2022-03-20 14:07:23,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:07:23,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [227643773] [2022-03-20 14:07:23,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [227643773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:23,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:23,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 14:07:23,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140395291] [2022-03-20 14:07:23,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:07:23,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 14:07:23,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:23,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 14:07:23,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 14:07:23,799 INFO L87 Difference]: Start difference. First operand 704 states and 770 transitions. Second operand has 37 states, 37 states have (on average 7.378378378378378) internal successors, (273), 36 states have internal predecessors, (273), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 14:07:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:07:28,789 INFO L93 Difference]: Finished difference Result 733 states and 801 transitions. [2022-03-20 14:07:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 14:07:28,789 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 7.378378378378378) internal successors, (273), 36 states have internal predecessors, (273), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 343 [2022-03-20 14:07:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:07:28,791 INFO L225 Difference]: With dead ends: 733 [2022-03-20 14:07:28,791 INFO L226 Difference]: Without dead ends: 727 [2022-03-20 14:07:28,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=4763, Invalid=6157, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 14:07:28,792 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 142 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:07:28,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 365 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 14:07:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-03-20 14:07:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 724. [2022-03-20 14:07:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 577 states have (on average 1.1195840554592722) internal successors, (646), 577 states have internal predecessors, (646), 74 states have call successors, (74), 74 states have call predecessors, (74), 72 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-20 14:07:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 792 transitions. [2022-03-20 14:07:29,018 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 792 transitions. Word has length 343 [2022-03-20 14:07:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:07:29,018 INFO L478 AbstractCegarLoop]: Abstraction has 724 states and 792 transitions. [2022-03-20 14:07:29,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 7.378378378378378) internal successors, (273), 36 states have internal predecessors, (273), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 14:07:29,019 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 792 transitions. [2022-03-20 14:07:29,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-03-20 14:07:29,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:07:29,020 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:07:29,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 14:07:29,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:07:29,239 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:07:29,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:07:29,239 INFO L85 PathProgramCache]: Analyzing trace with hash 231550605, now seen corresponding path program 65 times [2022-03-20 14:07:29,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:29,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [857535439] [2022-03-20 14:07:29,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:07:29,242 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:07:29,242 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:07:29,242 INFO L85 PathProgramCache]: Analyzing trace with hash 231550605, now seen corresponding path program 66 times [2022-03-20 14:07:29,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:07:29,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100705788] [2022-03-20 14:07:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:07:29,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:07:29,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:07:29,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782666710] [2022-03-20 14:07:29,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:07:29,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:07:29,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:07:29,251 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:07:29,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 14:07:29,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2022-03-20 14:07:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:07:29,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 14:07:29,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:07:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5746 backedges. 68 proven. 5678 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:07:36,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:07:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5746 backedges. 68 proven. 3434 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-03-20 14:07:47,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:07:47,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100705788] [2022-03-20 14:07:47,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:07:47,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782666710] [2022-03-20 14:07:47,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782666710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:07:47,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:07:47,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2022-03-20 14:07:47,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:07:47,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [857535439] [2022-03-20 14:07:47,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [857535439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:47,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:47,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 14:07:47,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386704255] [2022-03-20 14:07:47,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:07:47,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 14:07:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 14:07:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2561, Invalid=2841, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 14:07:47,843 INFO L87 Difference]: Start difference. First operand 724 states and 792 transitions. Second operand has 38 states, 38 states have (on average 7.394736842105263) internal successors, (281), 37 states have internal predecessors, (281), 37 states have call successors, (37), 37 states have call predecessors, (37), 35 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 14:07:52,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:07:52,942 INFO L93 Difference]: Finished difference Result 753 states and 823 transitions. [2022-03-20 14:07:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 14:07:52,943 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 7.394736842105263) internal successors, (281), 37 states have internal predecessors, (281), 37 states have call successors, (37), 37 states have call predecessors, (37), 35 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Word has length 353 [2022-03-20 14:07:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:07:52,945 INFO L225 Difference]: With dead ends: 753 [2022-03-20 14:07:52,945 INFO L226 Difference]: Without dead ends: 747 [2022-03-20 14:07:52,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=5043, Invalid=6513, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 14:07:52,946 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 139 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:07:52,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 360 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 14:07:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-20 14:07:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 744. [2022-03-20 14:07:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 593 states have (on average 1.1197301854974704) internal successors, (664), 593 states have internal predecessors, (664), 76 states have call successors, (76), 76 states have call predecessors, (76), 74 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-03-20 14:07:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 814 transitions. [2022-03-20 14:07:53,169 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 814 transitions. Word has length 353 [2022-03-20 14:07:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:07:53,170 INFO L478 AbstractCegarLoop]: Abstraction has 744 states and 814 transitions. [2022-03-20 14:07:53,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 7.394736842105263) internal successors, (281), 37 states have internal predecessors, (281), 37 states have call successors, (37), 37 states have call predecessors, (37), 35 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 14:07:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 814 transitions. [2022-03-20 14:07:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-03-20 14:07:53,171 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:07:53,172 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:07:53,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-20 14:07:53,389 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:07:53,390 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:07:53,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:07:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash -559538995, now seen corresponding path program 67 times [2022-03-20 14:07:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:53,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [524624970] [2022-03-20 14:07:53,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:07:53,393 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 14:07:53,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 14:07:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash -559538995, now seen corresponding path program 68 times [2022-03-20 14:07:53,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:07:53,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577837114] [2022-03-20 14:07:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:07:53,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:07:53,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:07:53,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875163167] [2022-03-20 14:07:53,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:07:53,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:07:53,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:07:53,402 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:07:53,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 14:07:53,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:07:53,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:07:53,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 14:07:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:08:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6090 backedges. 70 proven. 6020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:08:00,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:08:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6090 backedges. 70 proven. 3640 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-20 14:08:12,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:08:12,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577837114] [2022-03-20 14:08:12,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:08:12,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875163167] [2022-03-20 14:08:12,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875163167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:08:12,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:08:12,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2022-03-20 14:08:12,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:08:12,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [524624970] [2022-03-20 14:08:12,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [524624970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:08:12,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:08:12,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 14:08:12,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596686216] [2022-03-20 14:08:12,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:08:12,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 14:08:12,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:08:12,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 14:08:12,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=2994, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 14:08:12,708 INFO L87 Difference]: Start difference. First operand 744 states and 814 transitions. Second operand has 39 states, 39 states have (on average 7.410256410256411) internal successors, (289), 38 states have internal predecessors, (289), 38 states have call successors, (38), 38 states have call predecessors, (38), 36 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36)