/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/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 14:32:24,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:32:24,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:32:24,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 14:32:24,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 14:32:24,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 14:32:24,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 14:32:24,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 14:32:24,967 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:32:24,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:32:24,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:32:24,968 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:32:24,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:32:24,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:32:24,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:32:24,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:32:24,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:32:24,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:32:24,969 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:32:24,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:32:24,969 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:32:24,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:32:24,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:32:24,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:32:24,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:32:24,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:32:24,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:32:24,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:32:24,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:32:24,971 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:32:24,971 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:32:24,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:32:24,971 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:32:24,971 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:32:25,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:32:25,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:32:25,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:32:25,168 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:32:25,168 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:32:25,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-04-06 14:32:25,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2367622fa/6e5ada58ec2b4415b16fd33ab5f10a34/FLAG3db193f53 [2022-04-06 14:32:25,585 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:32:25,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-04-06 14:32:25,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2367622fa/6e5ada58ec2b4415b16fd33ab5f10a34/FLAG3db193f53 [2022-04-06 14:32:25,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2367622fa/6e5ada58ec2b4415b16fd33ab5f10a34 [2022-04-06 14:32:25,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:32:25,600 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:32:25,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:32:25,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:32:25,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:32:25,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:32:25" (1/1) ... [2022-04-06 14:32:25,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf2ab07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:32:25, skipping insertion in model container [2022-04-06 14:32:25,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:32:25" (1/1) ... [2022-04-06 14:32:25,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:32:25,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:32:25,756 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2022-04-06 14:32:25,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:32:25,769 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:32:25,776 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2022-04-06 14:32:25,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:32:25,787 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:32:25,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:32:25 WrapperNode [2022-04-06 14:32:25,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:32:25,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:32:25,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:32:25,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:32:25,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:32:25" (1/1) ... [2022-04-06 14:32:25,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:32:25" (1/1) ... [2022-04-06 14:32:25,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:32:25" (1/1) ... [2022-04-06 14:32:25,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:32:25" (1/1) ... [2022-04-06 14:32:25,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:32:25" (1/1) ... [2022-04-06 14:32:25,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:32:25" (1/1) ... [2022-04-06 14:32:25,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:32:25" (1/1) ... [2022-04-06 14:32:25,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:32:25,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:32:25,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:32:25,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:32:25,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:32:25" (1/1) ... [2022-04-06 14:32:25,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:32:25,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:25,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 14:32:25,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 14:32:25,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:32:25,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:32:25,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:32:25,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 14:32:25,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:32:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:32:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:32:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 14:32:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 14:32:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:32:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:32:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:32:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 14:32:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:32:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 14:32:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:32:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:32:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:32:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:32:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:32:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:32:25,917 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:32:25,918 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:32:25,994 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:32:25,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:32:25,998 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 14:32:25,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:32:25 BoogieIcfgContainer [2022-04-06 14:32:25,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:32:26,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:32:26,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:32:26,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:32:26,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:32:25" (1/3) ... [2022-04-06 14:32:26,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfdc785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:32:26, skipping insertion in model container [2022-04-06 14:32:26,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:32:25" (2/3) ... [2022-04-06 14:32:26,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfdc785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:32:26, skipping insertion in model container [2022-04-06 14:32:26,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:32:25" (3/3) ... [2022-04-06 14:32:26,004 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2022-04-06 14:32:26,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:32:26,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:32:26,050 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:32:26,061 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 14:32:26,061 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:32:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:32:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 14:32:26,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:26,104 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:26,104 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:26,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:26,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 1 times [2022-04-06 14:32:26,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:26,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368503119] [2022-04-06 14:32:26,124 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:32:26,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 2 times [2022-04-06 14:32:26,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:26,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656850948] [2022-04-06 14:32:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:26,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:26,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:32:26,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:26,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656850948] [2022-04-06 14:32:26,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656850948] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:26,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:26,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:32:26,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368503119] [2022-04-06 14:32:26,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368503119] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:26,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:26,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:32:26,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290175723] [2022-04-06 14:32:26,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:26,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 14:32:26,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:26,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 14:32:26,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:32:26,323 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-04-06 14:32:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:26,378 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-04-06 14:32:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 14:32:26,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2022-04-06 14:32:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:26,396 INFO L225 Difference]: With dead ends: 42 [2022-04-06 14:32:26,397 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 14:32:26,398 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 [2022-04-06 14:32:26,401 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:26,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:32:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 14:32:26,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 14:32:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 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) [2022-04-06 14:32:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-04-06 14:32:26,439 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-04-06 14:32:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:26,439 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-04-06 14:32:26,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-04-06 14:32:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-06 14:32:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 14:32:26,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:26,441 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:26,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:32:26,441 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:26,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 1 times [2022-04-06 14:32:26,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:26,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [351244992] [2022-04-06 14:32:26,445 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:32:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 2 times [2022-04-06 14:32:26,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:26,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668922680] [2022-04-06 14:32:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:26,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:26,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:32:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:26,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668922680] [2022-04-06 14:32:26,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668922680] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:26,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:26,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:32:26,528 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:26,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [351244992] [2022-04-06 14:32:26,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [351244992] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:26,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:26,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:32:26,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472211941] [2022-04-06 14:32:26,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:26,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:32:26,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:26,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:32:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 14:32:26,530 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-04-06 14:32:26,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:26,591 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-04-06 14:32:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:32:26,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2022-04-06 14:32:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:26,593 INFO L225 Difference]: With dead ends: 35 [2022-04-06 14:32:26,593 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 14:32:26,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 14:32:26,594 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:26,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:32:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 14:32:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-04-06 14:32:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 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) [2022-04-06 14:32:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 14:32:26,599 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-04-06 14:32:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:26,599 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 14:32:26,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-04-06 14:32:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 14:32:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 14:32:26,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:26,600 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:26,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 14:32:26,600 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:26,601 INFO L85 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 1 times [2022-04-06 14:32:26,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:26,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1334723055] [2022-04-06 14:32:26,617 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:26,618 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:26,618 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:26,618 INFO L85 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 2 times [2022-04-06 14:32:26,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:26,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4163510] [2022-04-06 14:32:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:26,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:26,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:32:26,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:26,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4163510] [2022-04-06 14:32:26,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4163510] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:26,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052249861] [2022-04-06 14:32:26,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:26,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:26,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:26,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:26,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 14:32:26,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 14:32:26,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 14:32:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:32:26,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 14:32:26,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052249861] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:26,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 14:32:26,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-04-06 14:32:26,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:26,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1334723055] [2022-04-06 14:32:26,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1334723055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:26,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:26,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:32:26,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430320689] [2022-04-06 14:32:26,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:26,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:32:26,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:32:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 14:32:26,838 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-04-06 14:32:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:26,894 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-04-06 14:32:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:32:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2022-04-06 14:32:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:26,896 INFO L225 Difference]: With dead ends: 29 [2022-04-06 14:32:26,897 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 14:32:26,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 14:32:26,903 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:26,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:32:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 14:32:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-04-06 14:32:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 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) [2022-04-06 14:32:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-04-06 14:32:26,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-04-06 14:32:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:26,907 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-04-06 14:32:26,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-04-06 14:32:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-04-06 14:32:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 14:32:26,908 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:26,908 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:26,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 14:32:27,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:27,128 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:27,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:27,128 INFO L85 PathProgramCache]: Analyzing trace with hash -62255392, now seen corresponding path program 1 times [2022-04-06 14:32:27,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:27,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1093066330] [2022-04-06 14:32:27,131 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:27,131 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:27,131 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash -62255392, now seen corresponding path program 2 times [2022-04-06 14:32:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:27,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929446322] [2022-04-06 14:32:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:27,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:27,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 14:32:27,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:27,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929446322] [2022-04-06 14:32:27,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929446322] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:27,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467601130] [2022-04-06 14:32:27,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:27,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:27,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:27,217 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:27,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 14:32:27,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:27,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:27,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 14:32:27,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 14:32:27,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 14:32:27,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467601130] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:27,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:27,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 14:32:27,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:27,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1093066330] [2022-04-06 14:32:27,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1093066330] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:27,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:27,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:32:27,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626336294] [2022-04-06 14:32:27,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:27,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:32:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:27,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:32:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 14:32:27,328 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-04-06 14:32:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:27,369 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-04-06 14:32:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:32:27,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 21 [2022-04-06 14:32:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:27,370 INFO L225 Difference]: With dead ends: 44 [2022-04-06 14:32:27,370 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 14:32:27,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 14:32:27,371 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:27,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:32:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 14:32:27,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-04-06 14:32:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 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) [2022-04-06 14:32:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-04-06 14:32:27,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2022-04-06 14:32:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:27,375 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-04-06 14:32:27,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-04-06 14:32:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-04-06 14:32:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 14:32:27,376 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:27,376 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:27,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:27,592 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,SelfDestructingSolverStorable3 [2022-04-06 14:32:27,592 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:27,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:27,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1107704446, now seen corresponding path program 3 times [2022-04-06 14:32:27,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:27,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60599961] [2022-04-06 14:32:27,594 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:27,595 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:27,595 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:27,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1107704446, now seen corresponding path program 4 times [2022-04-06 14:32:27,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:27,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229694542] [2022-04-06 14:32:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:27,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:27,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:32:27,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:27,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229694542] [2022-04-06 14:32:27,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229694542] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:27,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735094224] [2022-04-06 14:32:27,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:27,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:27,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:27,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:27,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 14:32:27,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:27,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:27,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 14:32:27,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 14:32:27,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 14:32:27,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735094224] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:27,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:27,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-04-06 14:32:27,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:27,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60599961] [2022-04-06 14:32:27,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60599961] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:27,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:27,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:32:27,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973260073] [2022-04-06 14:32:27,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:27,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:32:27,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:27,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:32:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:32:27,815 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-04-06 14:32:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:27,882 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-04-06 14:32:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:32:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 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 23 [2022-04-06 14:32:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:27,883 INFO L225 Difference]: With dead ends: 35 [2022-04-06 14:32:27,883 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 14:32:27,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:32:27,884 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:27,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 31 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:32:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 14:32:27,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-04-06 14:32:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 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) [2022-04-06 14:32:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-04-06 14:32:27,889 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2022-04-06 14:32:27,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:27,889 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-04-06 14:32:27,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-04-06 14:32:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-04-06 14:32:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 14:32:27,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:27,890 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:27,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 14:32:28,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:28,105 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:28,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:28,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2073673735, now seen corresponding path program 5 times [2022-04-06 14:32:28,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:28,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [485411185] [2022-04-06 14:32:28,107 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:28,107 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:28,107 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2073673735, now seen corresponding path program 6 times [2022-04-06 14:32:28,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:28,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512748093] [2022-04-06 14:32:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:28,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:28,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:28,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:28,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512748093] [2022-04-06 14:32:28,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512748093] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:28,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299035190] [2022-04-06 14:32:28,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:28,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:28,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:28,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:28,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 14:32:28,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 14:32:28,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:28,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:32:28,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:32:28,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:32:28,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299035190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:28,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:28,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-04-06 14:32:28,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:28,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [485411185] [2022-04-06 14:32:28,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [485411185] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:28,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:28,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:32:28,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997003343] [2022-04-06 14:32:28,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:28,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:32:28,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:28,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:32:28,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:32:28,333 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-04-06 14:32:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:28,386 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-04-06 14:32:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:32:28,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 27 [2022-04-06 14:32:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:28,387 INFO L225 Difference]: With dead ends: 54 [2022-04-06 14:32:28,387 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 14:32:28,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-04-06 14:32:28,388 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:28,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 27 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:32:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 14:32:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-04-06 14:32:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 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) [2022-04-06 14:32:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-04-06 14:32:28,393 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2022-04-06 14:32:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:28,393 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-04-06 14:32:28,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-04-06 14:32:28,393 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-04-06 14:32:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 14:32:28,393 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:28,394 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:28,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:28,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:28,610 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:28,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:28,610 INFO L85 PathProgramCache]: Analyzing trace with hash -550585065, now seen corresponding path program 7 times [2022-04-06 14:32:28,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:28,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807216766] [2022-04-06 14:32:28,612 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:28,612 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:28,612 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:28,612 INFO L85 PathProgramCache]: Analyzing trace with hash -550585065, now seen corresponding path program 8 times [2022-04-06 14:32:28,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:28,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610571067] [2022-04-06 14:32:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:28,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:28,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:28,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:28,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610571067] [2022-04-06 14:32:28,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610571067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:28,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532806755] [2022-04-06 14:32:28,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:28,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:28,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:28,672 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:28,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 14:32:28,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:28,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:28,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 14:32:28,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:28,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:28,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532806755] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:28,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:28,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 14:32:28,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:28,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807216766] [2022-04-06 14:32:28,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807216766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:28,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:28,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:32:28,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072736686] [2022-04-06 14:32:28,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:28,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:32:28,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:28,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:32:28,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:32:28,826 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-04-06 14:32:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:28,934 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-04-06 14:32:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:32:28,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 29 [2022-04-06 14:32:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:28,937 INFO L225 Difference]: With dead ends: 61 [2022-04-06 14:32:28,937 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 14:32:28,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:32:28,938 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:28,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 27 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 14:32:28,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2022-04-06 14:32:28,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 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) [2022-04-06 14:32:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-04-06 14:32:28,950 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2022-04-06 14:32:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:28,950 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-04-06 14:32:28,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-04-06 14:32:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-04-06 14:32:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 14:32:28,951 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:28,951 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:28,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:29,165 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:29,165 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:29,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:29,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1446221131, now seen corresponding path program 9 times [2022-04-06 14:32:29,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:29,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797930991] [2022-04-06 14:32:29,168 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:29,168 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:29,168 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1446221131, now seen corresponding path program 10 times [2022-04-06 14:32:29,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:29,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531656051] [2022-04-06 14:32:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:29,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:29,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:29,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:29,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531656051] [2022-04-06 14:32:29,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531656051] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:29,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674551465] [2022-04-06 14:32:29,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:29,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:29,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:29,230 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:29,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 14:32:29,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:29,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:29,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:32:29,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:29,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:29,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674551465] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:29,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:29,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 14:32:29,391 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:29,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797930991] [2022-04-06 14:32:29,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797930991] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:29,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:29,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:32:29,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269762477] [2022-04-06 14:32:29,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:29,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:32:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:32:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-04-06 14:32:29,392 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-04-06 14:32:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:29,470 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-04-06 14:32:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:32:29,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 31 [2022-04-06 14:32:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:29,471 INFO L225 Difference]: With dead ends: 68 [2022-04-06 14:32:29,471 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 14:32:29,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-04-06 14:32:29,472 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:29,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 32 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:32:29,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 14:32:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2022-04-06 14:32:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 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) [2022-04-06 14:32:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-06 14:32:29,477 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 31 [2022-04-06 14:32:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:29,477 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-06 14:32:29,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-04-06 14:32:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-06 14:32:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 14:32:29,478 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:29,478 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:29,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:29,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:29,691 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1135945939, now seen corresponding path program 11 times [2022-04-06 14:32:29,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:29,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2126106905] [2022-04-06 14:32:29,693 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:29,693 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:29,693 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:29,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1135945939, now seen corresponding path program 12 times [2022-04-06 14:32:29,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:29,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684262494] [2022-04-06 14:32:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:29,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:29,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:29,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:29,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684262494] [2022-04-06 14:32:29,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684262494] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:29,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518427398] [2022-04-06 14:32:29,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:29,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:29,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:29,754 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:29,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 14:32:29,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:32:29,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:29,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:32:29,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 14:32:29,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 14:32:29,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518427398] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:29,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:29,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-04-06 14:32:29,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:29,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2126106905] [2022-04-06 14:32:29,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2126106905] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:29,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:29,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:32:29,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480660282] [2022-04-06 14:32:29,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:29,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:32:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:29,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:32:29,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-04-06 14:32:29,917 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-04-06 14:32:30,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:30,020 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-04-06 14:32:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:32:30,020 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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 33 [2022-04-06 14:32:30,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:30,021 INFO L225 Difference]: With dead ends: 75 [2022-04-06 14:32:30,021 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 14:32:30,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-04-06 14:32:30,022 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:30,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 27 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 14:32:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2022-04-06 14:32:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 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) [2022-04-06 14:32:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-04-06 14:32:30,027 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 33 [2022-04-06 14:32:30,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:30,027 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-04-06 14:32:30,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-04-06 14:32:30,027 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-04-06 14:32:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 14:32:30,027 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:30,027 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:30,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:30,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:30,244 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:30,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash 107403121, now seen corresponding path program 13 times [2022-04-06 14:32:30,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:30,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1733677182] [2022-04-06 14:32:30,245 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:30,245 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:30,245 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:30,246 INFO L85 PathProgramCache]: Analyzing trace with hash 107403121, now seen corresponding path program 14 times [2022-04-06 14:32:30,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:30,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273879249] [2022-04-06 14:32:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:30,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:30,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:30,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273879249] [2022-04-06 14:32:30,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273879249] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168500009] [2022-04-06 14:32:30,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:30,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:30,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:30,308 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:30,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 14:32:30,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:30,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:30,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 14:32:30,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:30,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:30,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168500009] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:30,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:30,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 14:32:30,496 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:30,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1733677182] [2022-04-06 14:32:30,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1733677182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:30,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:30,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:32:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188830421] [2022-04-06 14:32:30,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:30,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:32:30,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:32:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:32:30,498 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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) [2022-04-06 14:32:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:30,640 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-04-06 14:32:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:32:30,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 35 [2022-04-06 14:32:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:30,641 INFO L225 Difference]: With dead ends: 82 [2022-04-06 14:32:30,641 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 14:32:30,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-04-06 14:32:30,642 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 158 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:30,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 22 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 14:32:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2022-04-06 14:32:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 3 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) [2022-04-06 14:32:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-04-06 14:32:30,655 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 35 [2022-04-06 14:32:30,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:30,655 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-04-06 14:32:30,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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) [2022-04-06 14:32:30,655 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-04-06 14:32:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 14:32:30,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:30,656 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:30,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:30,856 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,SelfDestructingSolverStorable9 [2022-04-06 14:32:30,856 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash -479766897, now seen corresponding path program 15 times [2022-04-06 14:32:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:30,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045624431] [2022-04-06 14:32:30,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:30,858 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:30,858 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:30,858 INFO L85 PathProgramCache]: Analyzing trace with hash -479766897, now seen corresponding path program 16 times [2022-04-06 14:32:30,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:30,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055560649] [2022-04-06 14:32:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:30,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:30,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:30,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:30,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055560649] [2022-04-06 14:32:30,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055560649] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:30,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204878758] [2022-04-06 14:32:30,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:30,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:30,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:30,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:30,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 14:32:30,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:30,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:30,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 14:32:30,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:31,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:31,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204878758] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:31,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:31,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 14:32:31,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:31,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1045624431] [2022-04-06 14:32:31,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1045624431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:31,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:31,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:32:31,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857073015] [2022-04-06 14:32:31,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:31,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:32:31,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:31,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:32:31,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-04-06 14:32:31,151 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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) [2022-04-06 14:32:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:31,263 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2022-04-06 14:32:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:32:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 37 [2022-04-06 14:32:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:31,263 INFO L225 Difference]: With dead ends: 89 [2022-04-06 14:32:31,263 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 14:32:31,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:32:31,264 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 129 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:31,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 37 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 14:32:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2022-04-06 14:32:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 3 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) [2022-04-06 14:32:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-04-06 14:32:31,270 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2022-04-06 14:32:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:31,270 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-04-06 14:32:31,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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) [2022-04-06 14:32:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-04-06 14:32:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 14:32:31,270 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:31,270 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:31,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:31,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:31,488 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:31,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2109438419, now seen corresponding path program 17 times [2022-04-06 14:32:31,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:31,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408630056] [2022-04-06 14:32:31,489 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:31,489 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:31,490 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:31,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2109438419, now seen corresponding path program 18 times [2022-04-06 14:32:31,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:31,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906925005] [2022-04-06 14:32:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:31,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:31,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906925005] [2022-04-06 14:32:31,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906925005] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618973635] [2022-04-06 14:32:31,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:31,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:31,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:31,551 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:31,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 14:32:31,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:32:31,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:32:31,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:32:31,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:32:31,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618973635] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:31,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:31,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-04-06 14:32:31,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408630056] [2022-04-06 14:32:31,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408630056] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:31,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:31,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:32:31,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586343802] [2022-04-06 14:32:31,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:31,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:32:31,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:32:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:32:31,749 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 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) [2022-04-06 14:32:31,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:31,907 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-04-06 14:32:31,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:32:31,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 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 39 [2022-04-06 14:32:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:31,908 INFO L225 Difference]: With dead ends: 96 [2022-04-06 14:32:31,908 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 14:32:31,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2022-04-06 14:32:31,909 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:31,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 22 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 14:32:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2022-04-06 14:32:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 3 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) [2022-04-06 14:32:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-04-06 14:32:31,917 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2022-04-06 14:32:31,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:31,917 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-04-06 14:32:31,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 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) [2022-04-06 14:32:31,917 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-04-06 14:32:31,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 14:32:31,918 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:31,918 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:31,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:32,131 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,SelfDestructingSolverStorable11 [2022-04-06 14:32:32,131 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash -560708021, now seen corresponding path program 19 times [2022-04-06 14:32:32,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:32,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1936580138] [2022-04-06 14:32:32,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:32,133 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:32,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:32,133 INFO L85 PathProgramCache]: Analyzing trace with hash -560708021, now seen corresponding path program 20 times [2022-04-06 14:32:32,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:32,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279355393] [2022-04-06 14:32:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:32,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:32,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:32,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:32,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279355393] [2022-04-06 14:32:32,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279355393] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:32,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921737207] [2022-04-06 14:32:32,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:32,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:32,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:32,221 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:32,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 14:32:32,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:32,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:32,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 14:32:32,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:32,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:32,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921737207] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:32,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:32,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 14:32:32,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:32,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1936580138] [2022-04-06 14:32:32,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1936580138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:32,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:32,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:32:32,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072084602] [2022-04-06 14:32:32,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:32,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:32:32,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:32,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:32:32,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:32:32,464 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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) [2022-04-06 14:32:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:32,632 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2022-04-06 14:32:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:32:32,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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 41 [2022-04-06 14:32:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:32,633 INFO L225 Difference]: With dead ends: 103 [2022-04-06 14:32:32,633 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 14:32:32,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:32:32,634 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:32,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 37 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 14:32:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 44. [2022-04-06 14:32:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 3 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) [2022-04-06 14:32:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-04-06 14:32:32,640 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 41 [2022-04-06 14:32:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:32,640 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-04-06 14:32:32,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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) [2022-04-06 14:32:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-04-06 14:32:32,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 14:32:32,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:32,641 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:32,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:32,859 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,SelfDestructingSolverStorable12 [2022-04-06 14:32:32,859 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:32,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:32,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1710520041, now seen corresponding path program 21 times [2022-04-06 14:32:32,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:32,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1646881389] [2022-04-06 14:32:32,861 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:32,861 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:32,861 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1710520041, now seen corresponding path program 22 times [2022-04-06 14:32:32,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:32,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430500097] [2022-04-06 14:32:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:32,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:32,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:32,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:32,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430500097] [2022-04-06 14:32:32,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430500097] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:32,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448327841] [2022-04-06 14:32:32,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:32,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:32,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:32,940 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:32,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 14:32:32,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:32,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:32,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 14:32:32,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:33,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:33,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448327841] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:33,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:33,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 14:32:33,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:33,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1646881389] [2022-04-06 14:32:33,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1646881389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:33,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:33,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:32:33,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585510431] [2022-04-06 14:32:33,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:33,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:32:33,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:32:33,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:32:33,223 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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) [2022-04-06 14:32:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:33,428 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2022-04-06 14:32:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:32:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 43 [2022-04-06 14:32:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:33,429 INFO L225 Difference]: With dead ends: 110 [2022-04-06 14:32:33,429 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 14:32:33,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 14:32:33,430 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 224 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:33,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 27 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 14:32:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2022-04-06 14:32:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 3 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) [2022-04-06 14:32:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-04-06 14:32:33,436 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 43 [2022-04-06 14:32:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:33,436 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-04-06 14:32:33,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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) [2022-04-06 14:32:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-04-06 14:32:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 14:32:33,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:33,437 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:33,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:33,652 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,SelfDestructingSolverStorable13 [2022-04-06 14:32:33,653 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:33,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:33,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1777666041, now seen corresponding path program 23 times [2022-04-06 14:32:33,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:33,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [202056357] [2022-04-06 14:32:33,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:33,654 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:33,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1777666041, now seen corresponding path program 24 times [2022-04-06 14:32:33,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:33,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203712932] [2022-04-06 14:32:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:33,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:33,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:33,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:33,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203712932] [2022-04-06 14:32:33,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203712932] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:33,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025979094] [2022-04-06 14:32:33,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:33,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:33,757 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:33,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 14:32:33,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:32:33,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:33,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:32:33,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 14:32:33,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 14:32:33,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025979094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:33,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:33,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 21 [2022-04-06 14:32:33,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:33,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [202056357] [2022-04-06 14:32:33,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [202056357] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:33,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:33,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:32:33,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821732829] [2022-04-06 14:32:33,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:33,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:32:33,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:32:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2022-04-06 14:32:33,948 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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) [2022-04-06 14:32:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:34,154 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2022-04-06 14:32:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:32:34,154 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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 45 [2022-04-06 14:32:34,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:34,155 INFO L225 Difference]: With dead ends: 117 [2022-04-06 14:32:34,155 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 14:32:34,155 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=680, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 14:32:34,156 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 231 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:34,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 27 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 14:32:34,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2022-04-06 14:32:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 3 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) [2022-04-06 14:32:34,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-04-06 14:32:34,162 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2022-04-06 14:32:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:34,162 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-04-06 14:32:34,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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) [2022-04-06 14:32:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-04-06 14:32:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 14:32:34,162 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:34,163 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:34,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 14:32:34,381 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,SelfDestructingSolverStorable14 [2022-04-06 14:32:34,381 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:34,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:34,382 INFO L85 PathProgramCache]: Analyzing trace with hash 444967333, now seen corresponding path program 25 times [2022-04-06 14:32:34,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:34,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [266528129] [2022-04-06 14:32:34,383 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:34,383 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:34,383 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:34,383 INFO L85 PathProgramCache]: Analyzing trace with hash 444967333, now seen corresponding path program 26 times [2022-04-06 14:32:34,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:34,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17888017] [2022-04-06 14:32:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:34,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:34,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:34,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:34,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17888017] [2022-04-06 14:32:34,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17888017] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:34,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017862147] [2022-04-06 14:32:34,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:34,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:34,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:34,482 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:34,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 14:32:34,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:34,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:34,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 14:32:34,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:34,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:34,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017862147] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:34,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:34,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 14:32:34,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:34,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [266528129] [2022-04-06 14:32:34,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [266528129] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:34,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:34,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:32:34,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56126998] [2022-04-06 14:32:34,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:34,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:32:34,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:32:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-04-06 14:32:34,859 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 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) [2022-04-06 14:32:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:35,116 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2022-04-06 14:32:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:32:35,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 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 47 [2022-04-06 14:32:35,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:35,120 INFO L225 Difference]: With dead ends: 124 [2022-04-06 14:32:35,120 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 14:32:35,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 14:32:35,121 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 241 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:35,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 32 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 14:32:35,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 50. [2022-04-06 14:32:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 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) [2022-04-06 14:32:35,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-04-06 14:32:35,128 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 47 [2022-04-06 14:32:35,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:35,128 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-04-06 14:32:35,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 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) [2022-04-06 14:32:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-04-06 14:32:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 14:32:35,128 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:35,128 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:35,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:35,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:35,343 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:35,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1796893635, now seen corresponding path program 27 times [2022-04-06 14:32:35,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:35,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1281569611] [2022-04-06 14:32:35,345 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:35,345 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:35,345 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:35,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1796893635, now seen corresponding path program 28 times [2022-04-06 14:32:35,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:35,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497652987] [2022-04-06 14:32:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:35,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:35,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:35,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:35,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497652987] [2022-04-06 14:32:35,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497652987] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:35,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182193499] [2022-04-06 14:32:35,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:35,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:35,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:35,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:35,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 14:32:35,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:35,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:35,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 14:32:35,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:35,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:35,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182193499] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:35,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:35,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 14:32:35,855 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:35,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1281569611] [2022-04-06 14:32:35,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1281569611] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:35,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:35,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:32:35,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628648161] [2022-04-06 14:32:35,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:35,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:32:35,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:32:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-04-06 14:32:35,868 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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) [2022-04-06 14:32:36,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:36,182 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2022-04-06 14:32:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:32:36,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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 49 [2022-04-06 14:32:36,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:36,184 INFO L225 Difference]: With dead ends: 131 [2022-04-06 14:32:36,184 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 14:32:36,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 14:32:36,185 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 311 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:36,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 32 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:36,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 14:32:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2022-04-06 14:32:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 3 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) [2022-04-06 14:32:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-04-06 14:32:36,192 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 49 [2022-04-06 14:32:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:36,192 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-04-06 14:32:36,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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) [2022-04-06 14:32:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-04-06 14:32:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 14:32:36,192 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:36,193 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:36,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 14:32:36,403 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,SelfDestructingSolverStorable16 [2022-04-06 14:32:36,403 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash -377020831, now seen corresponding path program 29 times [2022-04-06 14:32:36,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:36,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1836633331] [2022-04-06 14:32:36,405 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:36,405 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:36,405 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:36,405 INFO L85 PathProgramCache]: Analyzing trace with hash -377020831, now seen corresponding path program 30 times [2022-04-06 14:32:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:36,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52587893] [2022-04-06 14:32:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:36,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:36,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:36,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:36,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52587893] [2022-04-06 14:32:36,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52587893] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:36,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763023044] [2022-04-06 14:32:36,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:36,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:36,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:36,534 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:36,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 14:32:36,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:32:36,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:36,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:32:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 14:32:36,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 14:32:36,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763023044] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:36,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:36,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 24 [2022-04-06 14:32:36,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:36,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1836633331] [2022-04-06 14:32:36,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1836633331] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:36,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:36,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:32:36,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615325928] [2022-04-06 14:32:36,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:36,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:32:36,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:36,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:32:36,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:32:36,748 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 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) [2022-04-06 14:32:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:37,052 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2022-04-06 14:32:37,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 14:32:37,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 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 51 [2022-04-06 14:32:37,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:37,053 INFO L225 Difference]: With dead ends: 138 [2022-04-06 14:32:37,053 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 14:32:37,053 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=532, Invalid=950, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 14:32:37,054 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 334 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:37,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 27 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:37,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 14:32:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 54. [2022-04-06 14:32:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 3 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) [2022-04-06 14:32:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-04-06 14:32:37,061 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 51 [2022-04-06 14:32:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:37,061 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-04-06 14:32:37,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 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) [2022-04-06 14:32:37,061 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-04-06 14:32:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 14:32:37,062 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:37,062 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:37,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:37,268 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,SelfDestructingSolverStorable17 [2022-04-06 14:32:37,268 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2140250495, now seen corresponding path program 31 times [2022-04-06 14:32:37,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:37,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [88514083] [2022-04-06 14:32:37,270 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:37,270 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:37,270 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2140250495, now seen corresponding path program 32 times [2022-04-06 14:32:37,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:37,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460054210] [2022-04-06 14:32:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:37,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:37,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:37,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460054210] [2022-04-06 14:32:37,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460054210] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074772050] [2022-04-06 14:32:37,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:37,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:37,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:37,391 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:37,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 14:32:37,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:37,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:37,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 14:32:37,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:37,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:37,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074772050] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:37,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:37,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 14:32:37,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:37,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [88514083] [2022-04-06 14:32:37,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [88514083] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:37,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:37,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 14:32:37,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163089515] [2022-04-06 14:32:37,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:37,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 14:32:37,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:37,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 14:32:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 14:32:37,839 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-04-06 14:32:38,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:38,199 INFO L93 Difference]: Finished difference Result 145 states and 181 transitions. [2022-04-06 14:32:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:32:38,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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 53 [2022-04-06 14:32:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:38,200 INFO L225 Difference]: With dead ends: 145 [2022-04-06 14:32:38,200 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 14:32:38,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:32:38,201 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 294 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:38,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 37 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:38,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 14:32:38,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 56. [2022-04-06 14:32:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 3 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) [2022-04-06 14:32:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-04-06 14:32:38,211 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 53 [2022-04-06 14:32:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:38,211 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-04-06 14:32:38,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-04-06 14:32:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-04-06 14:32:38,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 14:32:38,211 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:38,211 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:38,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:38,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:38,420 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:38,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1123560163, now seen corresponding path program 33 times [2022-04-06 14:32:38,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:38,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1226933788] [2022-04-06 14:32:38,421 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:38,421 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:38,421 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:38,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1123560163, now seen corresponding path program 34 times [2022-04-06 14:32:38,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:38,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232609050] [2022-04-06 14:32:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:38,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:38,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:38,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:38,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232609050] [2022-04-06 14:32:38,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232609050] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:38,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070706056] [2022-04-06 14:32:38,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:38,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:38,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:38,566 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:38,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 14:32:38,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:38,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:38,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:32:38,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:38,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:39,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070706056] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:39,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:39,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 14:32:39,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:39,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1226933788] [2022-04-06 14:32:39,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1226933788] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:39,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:39,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:32:39,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679101850] [2022-04-06 14:32:39,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:39,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:32:39,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:32:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:32:39,062 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 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) [2022-04-06 14:32:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:39,434 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-04-06 14:32:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 14:32:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 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 55 [2022-04-06 14:32:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:39,435 INFO L225 Difference]: With dead ends: 152 [2022-04-06 14:32:39,435 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 14:32:39,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 14:32:39,436 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 319 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:39,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 32 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 14:32:39,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 58. [2022-04-06 14:32:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 3 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) [2022-04-06 14:32:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-04-06 14:32:39,445 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 55 [2022-04-06 14:32:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:39,445 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-04-06 14:32:39,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 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) [2022-04-06 14:32:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-04-06 14:32:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 14:32:39,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:39,445 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:39,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:39,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:39,652 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:39,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1975490875, now seen corresponding path program 35 times [2022-04-06 14:32:39,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:39,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1009979486] [2022-04-06 14:32:39,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:39,654 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:39,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:39,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1975490875, now seen corresponding path program 36 times [2022-04-06 14:32:39,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:39,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335135108] [2022-04-06 14:32:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:39,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:39,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:39,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335135108] [2022-04-06 14:32:39,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335135108] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735994404] [2022-04-06 14:32:39,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:39,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:39,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:39,821 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:39,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 14:32:39,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:32:39,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:39,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:32:39,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 14:32:39,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 14:32:40,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735994404] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:40,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:40,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 27 [2022-04-06 14:32:40,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:40,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1009979486] [2022-04-06 14:32:40,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1009979486] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:40,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:40,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 14:32:40,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141780901] [2022-04-06 14:32:40,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:40,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 14:32:40,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:40,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 14:32:40,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2022-04-06 14:32:40,072 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 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) [2022-04-06 14:32:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:40,487 INFO L93 Difference]: Finished difference Result 159 states and 199 transitions. [2022-04-06 14:32:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 14:32:40,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 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 57 [2022-04-06 14:32:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:40,488 INFO L225 Difference]: With dead ends: 159 [2022-04-06 14:32:40,489 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 14:32:40,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=715, Invalid=1265, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 14:32:40,489 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 346 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:40,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 32 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 14:32:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 60. [2022-04-06 14:32:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 3 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) [2022-04-06 14:32:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-04-06 14:32:40,499 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 57 [2022-04-06 14:32:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:40,500 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-04-06 14:32:40,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 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) [2022-04-06 14:32:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-04-06 14:32:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 14:32:40,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:40,500 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:40,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-04-06 14:32:40,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:40,707 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash -543765031, now seen corresponding path program 37 times [2022-04-06 14:32:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:40,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1766595605] [2022-04-06 14:32:40,709 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:40,709 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:40,709 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:40,709 INFO L85 PathProgramCache]: Analyzing trace with hash -543765031, now seen corresponding path program 38 times [2022-04-06 14:32:40,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:40,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138001320] [2022-04-06 14:32:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:40,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:40,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:40,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:40,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138001320] [2022-04-06 14:32:40,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138001320] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:40,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246709671] [2022-04-06 14:32:40,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:40,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:40,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:40,875 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:40,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 14:32:40,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:40,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:40,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 14:32:40,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:41,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:41,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246709671] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:41,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:41,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 14:32:41,438 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:41,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1766595605] [2022-04-06 14:32:41,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1766595605] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:41,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:41,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 14:32:41,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45059584] [2022-04-06 14:32:41,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:41,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 14:32:41,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:41,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 14:32:41,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 14:32:41,439 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 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) [2022-04-06 14:32:41,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:41,873 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2022-04-06 14:32:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 14:32:41,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 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 59 [2022-04-06 14:32:41,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:41,876 INFO L225 Difference]: With dead ends: 166 [2022-04-06 14:32:41,876 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 14:32:41,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 14:32:41,877 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 344 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:41,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 32 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 14:32:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 62. [2022-04-06 14:32:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 3 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) [2022-04-06 14:32:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-04-06 14:32:41,887 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2022-04-06 14:32:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:41,887 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-04-06 14:32:41,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 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) [2022-04-06 14:32:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-04-06 14:32:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 14:32:41,888 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:41,888 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:41,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-04-06 14:32:42,088 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,SelfDestructingSolverStorable21 [2022-04-06 14:32:42,088 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:42,089 INFO L85 PathProgramCache]: Analyzing trace with hash 812864247, now seen corresponding path program 39 times [2022-04-06 14:32:42,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:42,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1087731162] [2022-04-06 14:32:42,090 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:42,090 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:42,090 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:42,090 INFO L85 PathProgramCache]: Analyzing trace with hash 812864247, now seen corresponding path program 40 times [2022-04-06 14:32:42,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:42,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280666110] [2022-04-06 14:32:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:42,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:42,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:42,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:42,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280666110] [2022-04-06 14:32:42,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280666110] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:42,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58829098] [2022-04-06 14:32:42,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:42,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:42,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:42,278 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:42,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 14:32:42,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:42,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:42,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:32:42,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:42,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:42,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58829098] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:42,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:42,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 14:32:42,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:42,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1087731162] [2022-04-06 14:32:42,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1087731162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:42,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:42,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 14:32:42,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103663059] [2022-04-06 14:32:42,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:42,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 14:32:42,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 14:32:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 14:32:42,885 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 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) [2022-04-06 14:32:43,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:43,373 INFO L93 Difference]: Finished difference Result 173 states and 217 transitions. [2022-04-06 14:32:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 14:32:43,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 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 61 [2022-04-06 14:32:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:43,374 INFO L225 Difference]: With dead ends: 173 [2022-04-06 14:32:43,374 INFO L226 Difference]: Without dead ends: 156 [2022-04-06 14:32:43,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 14:32:43,378 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 461 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:43,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 32 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-06 14:32:43,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 64. [2022-04-06 14:32:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 3 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) [2022-04-06 14:32:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-04-06 14:32:43,393 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2022-04-06 14:32:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:43,393 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-04-06 14:32:43,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 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) [2022-04-06 14:32:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-04-06 14:32:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 14:32:43,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:43,394 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:43,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:43,608 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,SelfDestructingSolverStorable22 [2022-04-06 14:32:43,608 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:43,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:43,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1136457579, now seen corresponding path program 41 times [2022-04-06 14:32:43,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:43,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1573673432] [2022-04-06 14:32:43,610 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:43,610 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:43,610 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:43,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1136457579, now seen corresponding path program 42 times [2022-04-06 14:32:43,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:43,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255590952] [2022-04-06 14:32:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:43,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:43,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:43,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:43,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255590952] [2022-04-06 14:32:43,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255590952] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:43,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10745159] [2022-04-06 14:32:43,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:43,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:43,818 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:43,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 14:32:43,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:32:43,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:43,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:32:43,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 14:32:43,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 14:32:44,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10745159] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:44,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:44,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 30 [2022-04-06 14:32:44,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:44,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1573673432] [2022-04-06 14:32:44,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1573673432] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:44,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:44,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 14:32:44,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041233171] [2022-04-06 14:32:44,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:44,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 14:32:44,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 14:32:44,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2022-04-06 14:32:44,085 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 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) [2022-04-06 14:32:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:44,587 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2022-04-06 14:32:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 14:32:44,588 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 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 63 [2022-04-06 14:32:44,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:44,589 INFO L225 Difference]: With dead ends: 180 [2022-04-06 14:32:44,589 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 14:32:44,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=925, Invalid=1625, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 14:32:44,590 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 433 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:44,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 32 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 14:32:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 66. [2022-04-06 14:32:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 3 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) [2022-04-06 14:32:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-04-06 14:32:44,602 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2022-04-06 14:32:44,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:44,602 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-04-06 14:32:44,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 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) [2022-04-06 14:32:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-04-06 14:32:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 14:32:44,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:44,602 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:44,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:44,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:44,811 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:44,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1828991309, now seen corresponding path program 43 times [2022-04-06 14:32:44,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:44,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1250634730] [2022-04-06 14:32:44,812 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:44,812 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:44,812 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:44,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1828991309, now seen corresponding path program 44 times [2022-04-06 14:32:44,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:44,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231395336] [2022-04-06 14:32:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:44,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:44,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:45,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:45,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231395336] [2022-04-06 14:32:45,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231395336] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:45,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505583710] [2022-04-06 14:32:45,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:45,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:45,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:45,017 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:45,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 14:32:45,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:45,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:45,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 14:32:45,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:45,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:45,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505583710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:45,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:45,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 14:32:45,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:45,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1250634730] [2022-04-06 14:32:45,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1250634730] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:45,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:45,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 14:32:45,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675314607] [2022-04-06 14:32:45,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:45,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 14:32:45,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:45,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 14:32:45,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 14:32:45,729 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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) [2022-04-06 14:32:46,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:46,284 INFO L93 Difference]: Finished difference Result 187 states and 235 transitions. [2022-04-06 14:32:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 14:32:46,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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 65 [2022-04-06 14:32:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:46,285 INFO L225 Difference]: With dead ends: 187 [2022-04-06 14:32:46,285 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 14:32:46,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 14:32:46,286 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 474 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:46,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 32 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 14:32:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 68. [2022-04-06 14:32:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 3 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) [2022-04-06 14:32:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-04-06 14:32:46,305 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 65 [2022-04-06 14:32:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:46,306 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-04-06 14:32:46,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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) [2022-04-06 14:32:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-04-06 14:32:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 14:32:46,306 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:46,306 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:46,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:46,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:46,519 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1633974959, now seen corresponding path program 45 times [2022-04-06 14:32:46,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:46,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015148343] [2022-04-06 14:32:46,521 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:46,521 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:46,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:46,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1633974959, now seen corresponding path program 46 times [2022-04-06 14:32:46,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:46,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929702756] [2022-04-06 14:32:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:46,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:46,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:46,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929702756] [2022-04-06 14:32:46,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929702756] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623605231] [2022-04-06 14:32:46,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:46,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:46,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:46,747 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:46,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 14:32:46,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:46,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:46,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 14:32:46,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:46,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:47,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623605231] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:47,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:47,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 14:32:47,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:47,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015148343] [2022-04-06 14:32:47,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015148343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:47,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:47,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 14:32:47,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096832252] [2022-04-06 14:32:47,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:47,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 14:32:47,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:47,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 14:32:47,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 14:32:47,457 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 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) [2022-04-06 14:32:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:48,032 INFO L93 Difference]: Finished difference Result 194 states and 244 transitions. [2022-04-06 14:32:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 14:32:48,033 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 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 67 [2022-04-06 14:32:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:48,033 INFO L225 Difference]: With dead ends: 194 [2022-04-06 14:32:48,033 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 14:32:48,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 14:32:48,035 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:48,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 52 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 14:32:48,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 70. [2022-04-06 14:32:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 3 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) [2022-04-06 14:32:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-04-06 14:32:48,048 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2022-04-06 14:32:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:48,049 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-04-06 14:32:48,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 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) [2022-04-06 14:32:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-04-06 14:32:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 14:32:48,049 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:48,049 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:48,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:48,249 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,SelfDestructingSolverStorable25 [2022-04-06 14:32:48,250 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1093143663, now seen corresponding path program 47 times [2022-04-06 14:32:48,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:48,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1455956034] [2022-04-06 14:32:48,251 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:48,251 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:48,251 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1093143663, now seen corresponding path program 48 times [2022-04-06 14:32:48,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:48,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922204989] [2022-04-06 14:32:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:48,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:48,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:48,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:48,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922204989] [2022-04-06 14:32:48,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922204989] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:48,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754947196] [2022-04-06 14:32:48,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:48,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:48,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:48,494 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:48,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 14:32:48,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:32:48,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:48,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:32:48,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 14:32:48,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 14:32:48,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754947196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:48,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:48,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 33 [2022-04-06 14:32:48,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:48,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1455956034] [2022-04-06 14:32:48,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1455956034] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:48,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:48,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 14:32:48,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140226310] [2022-04-06 14:32:48,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:48,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 14:32:48,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:48,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 14:32:48,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 14:32:48,778 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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) [2022-04-06 14:32:49,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:49,424 INFO L93 Difference]: Finished difference Result 201 states and 253 transitions. [2022-04-06 14:32:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 14:32:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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 69 [2022-04-06 14:32:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:49,428 INFO L225 Difference]: With dead ends: 201 [2022-04-06 14:32:49,428 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 14:32:49,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1162, Invalid=2030, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 14:32:49,429 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 517 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:49,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 47 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 14:32:49,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 72. [2022-04-06 14:32:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 3 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) [2022-04-06 14:32:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-04-06 14:32:49,445 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2022-04-06 14:32:49,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:49,445 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-04-06 14:32:49,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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) [2022-04-06 14:32:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-04-06 14:32:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 14:32:49,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:49,445 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:49,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 14:32:49,659 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,SelfDestructingSolverStorable26 [2022-04-06 14:32:49,659 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1924088845, now seen corresponding path program 49 times [2022-04-06 14:32:49,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:49,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1331001705] [2022-04-06 14:32:49,661 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:49,661 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:49,661 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:49,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1924088845, now seen corresponding path program 50 times [2022-04-06 14:32:49,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:49,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139379055] [2022-04-06 14:32:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:49,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:49,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:49,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:49,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139379055] [2022-04-06 14:32:49,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139379055] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:49,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573269619] [2022-04-06 14:32:49,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:49,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:49,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:49,915 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:49,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 14:32:50,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:50,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:50,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 14:32:50,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:50,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:50,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573269619] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:50,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:50,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 14:32:50,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:50,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1331001705] [2022-04-06 14:32:50,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1331001705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:50,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:50,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 14:32:50,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272961879] [2022-04-06 14:32:50,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:50,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 14:32:50,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 14:32:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 14:32:50,718 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 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) [2022-04-06 14:32:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:51,420 INFO L93 Difference]: Finished difference Result 208 states and 262 transitions. [2022-04-06 14:32:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 14:32:51,425 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 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 71 [2022-04-06 14:32:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:51,426 INFO L225 Difference]: With dead ends: 208 [2022-04-06 14:32:51,426 INFO L226 Difference]: Without dead ends: 191 [2022-04-06 14:32:51,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 14:32:51,427 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 451 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:51,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 57 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-06 14:32:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 74. [2022-04-06 14:32:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 3 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) [2022-04-06 14:32:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-04-06 14:32:51,443 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2022-04-06 14:32:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:51,443 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-04-06 14:32:51,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 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) [2022-04-06 14:32:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-04-06 14:32:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 14:32:51,443 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:51,443 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:51,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:51,660 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,SelfDestructingSolverStorable27 [2022-04-06 14:32:51,661 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:51,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1598491691, now seen corresponding path program 51 times [2022-04-06 14:32:51,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:51,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [412580923] [2022-04-06 14:32:51,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:51,662 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:51,662 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:51,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1598491691, now seen corresponding path program 52 times [2022-04-06 14:32:51,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:51,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254317459] [2022-04-06 14:32:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:51,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:51,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:51,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254317459] [2022-04-06 14:32:51,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254317459] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169319170] [2022-04-06 14:32:51,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:51,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:51,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:51,912 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) [2022-04-06 14:32:51,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 14:32:52,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:52,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:52,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 14:32:52,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:52,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:52,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169319170] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:52,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:52,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 14:32:52,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:52,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [412580923] [2022-04-06 14:32:52,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [412580923] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:52,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:52,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 14:32:52,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919467913] [2022-04-06 14:32:52,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:52,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 14:32:52,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 14:32:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 14:32:52,764 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 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) [2022-04-06 14:32:53,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:53,540 INFO L93 Difference]: Finished difference Result 215 states and 271 transitions. [2022-04-06 14:32:53,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 14:32:53,540 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 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 73 [2022-04-06 14:32:53,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:53,541 INFO L225 Difference]: With dead ends: 215 [2022-04-06 14:32:53,541 INFO L226 Difference]: Without dead ends: 198 [2022-04-06 14:32:53,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 14:32:53,542 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 560 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:53,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 32 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-04-06 14:32:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 76. [2022-04-06 14:32:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 3 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) [2022-04-06 14:32:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-04-06 14:32:53,559 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 73 [2022-04-06 14:32:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:53,559 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-04-06 14:32:53,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 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) [2022-04-06 14:32:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-04-06 14:32:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 14:32:53,559 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:53,560 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:53,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 14:32:53,761 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,SelfDestructingSolverStorable28 [2022-04-06 14:32:53,762 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2062727991, now seen corresponding path program 53 times [2022-04-06 14:32:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:53,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [339522606] [2022-04-06 14:32:53,763 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:53,763 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:53,763 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2062727991, now seen corresponding path program 54 times [2022-04-06 14:32:53,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:53,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363947775] [2022-04-06 14:32:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:53,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:54,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:54,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:54,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363947775] [2022-04-06 14:32:54,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363947775] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:54,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645660223] [2022-04-06 14:32:54,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:54,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:54,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:54,048 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) [2022-04-06 14:32:54,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 14:32:54,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:32:54,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:32:54,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 14:32:54,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 14:32:54,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645660223] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:54,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:54,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 36 [2022-04-06 14:32:54,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:54,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [339522606] [2022-04-06 14:32:54,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [339522606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:54,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:54,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 14:32:54,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360320963] [2022-04-06 14:32:54,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:54,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 14:32:54,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:54,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 14:32:54,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 14:32:54,375 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 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) [2022-04-06 14:32:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:55,204 INFO L93 Difference]: Finished difference Result 222 states and 280 transitions. [2022-04-06 14:32:55,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 14:32:55,205 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 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 75 [2022-04-06 14:32:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:55,205 INFO L225 Difference]: With dead ends: 222 [2022-04-06 14:32:55,205 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 14:32:55,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1426, Invalid=2480, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 14:32:55,206 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 593 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:55,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 32 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 14:32:55,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 78. [2022-04-06 14:32:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 3 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) [2022-04-06 14:32:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-04-06 14:32:55,225 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2022-04-06 14:32:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:55,225 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-04-06 14:32:55,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 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) [2022-04-06 14:32:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-04-06 14:32:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 14:32:55,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:55,225 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:55,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:55,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:55,435 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1378340327, now seen corresponding path program 55 times [2022-04-06 14:32:55,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:55,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1212058975] [2022-04-06 14:32:55,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:55,437 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:55,437 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1378340327, now seen corresponding path program 56 times [2022-04-06 14:32:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:55,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875395336] [2022-04-06 14:32:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:55,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:55,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:55,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:55,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875395336] [2022-04-06 14:32:55,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875395336] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:55,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256168896] [2022-04-06 14:32:55,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:55,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:55,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:55,727 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) [2022-04-06 14:32:55,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 14:32:55,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:55,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:55,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 14:32:55,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:55,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:56,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256168896] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:56,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:56,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 14:32:56,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:56,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1212058975] [2022-04-06 14:32:56,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1212058975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:56,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:56,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 14:32:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052412896] [2022-04-06 14:32:56,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:56,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 14:32:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 14:32:56,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 14:32:56,668 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 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) [2022-04-06 14:32:57,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:57,523 INFO L93 Difference]: Finished difference Result 229 states and 289 transitions. [2022-04-06 14:32:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 14:32:57,523 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 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 77 [2022-04-06 14:32:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:57,524 INFO L225 Difference]: With dead ends: 229 [2022-04-06 14:32:57,524 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 14:32:57,524 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 14:32:57,525 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 641 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:57,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 32 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:32:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 14:32:57,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 80. [2022-04-06 14:32:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 3 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) [2022-04-06 14:32:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-04-06 14:32:57,544 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2022-04-06 14:32:57,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:57,544 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-04-06 14:32:57,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 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) [2022-04-06 14:32:57,544 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-04-06 14:32:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 14:32:57,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:57,545 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:57,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:57,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:57,761 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1120176005, now seen corresponding path program 57 times [2022-04-06 14:32:57,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:57,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2096397372] [2022-04-06 14:32:57,763 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:57,763 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:57,763 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:57,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1120176005, now seen corresponding path program 58 times [2022-04-06 14:32:57,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:57,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502036788] [2022-04-06 14:32:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:57,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:58,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:58,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:58,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502036788] [2022-04-06 14:32:58,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502036788] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:58,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092309348] [2022-04-06 14:32:58,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:58,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:58,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:58,076 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) [2022-04-06 14:32:58,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 14:32:58,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:58,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:58,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 14:32:58,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:58,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:32:59,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092309348] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:59,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:59,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 14:32:59,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:59,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2096397372] [2022-04-06 14:32:59,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2096397372] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:59,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:59,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 14:32:59,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760316236] [2022-04-06 14:32:59,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:59,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 14:32:59,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:59,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 14:32:59,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 14:32:59,092 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 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) [2022-04-06 14:33:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:00,046 INFO L93 Difference]: Finished difference Result 236 states and 298 transitions. [2022-04-06 14:33:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 14:33:00,047 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 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 79 [2022-04-06 14:33:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:00,047 INFO L225 Difference]: With dead ends: 236 [2022-04-06 14:33:00,048 INFO L226 Difference]: Without dead ends: 219 [2022-04-06 14:33:00,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 14:33:00,049 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 792 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:00,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 22 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:33:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-04-06 14:33:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 82. [2022-04-06 14:33:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 3 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) [2022-04-06 14:33:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-04-06 14:33:00,072 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 79 [2022-04-06 14:33:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:00,072 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-04-06 14:33:00,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 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) [2022-04-06 14:33:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-04-06 14:33:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 14:33:00,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:00,073 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:00,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 14:33:00,277 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,SelfDestructingSolverStorable31 [2022-04-06 14:33:00,278 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:00,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:00,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2132365731, now seen corresponding path program 59 times [2022-04-06 14:33:00,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:00,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [758192379] [2022-04-06 14:33:00,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:00,280 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:00,280 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:00,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2132365731, now seen corresponding path program 60 times [2022-04-06 14:33:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:00,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438233880] [2022-04-06 14:33:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:00,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:00,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:00,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:00,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438233880] [2022-04-06 14:33:00,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438233880] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:00,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730989688] [2022-04-06 14:33:00,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:33:00,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:00,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:00,606 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) [2022-04-06 14:33:00,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 14:33:00,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:33:00,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:33:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-04-06 14:33:00,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-04-06 14:33:00,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730989688] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:00,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:00,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 39 [2022-04-06 14:33:00,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:00,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [758192379] [2022-04-06 14:33:00,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [758192379] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:00,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:00,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 14:33:00,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856835494] [2022-04-06 14:33:00,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:00,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 14:33:00,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:00,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 14:33:00,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 14:33:00,946 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 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) [2022-04-06 14:33:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:01,962 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2022-04-06 14:33:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 14:33:01,963 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 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 81 [2022-04-06 14:33:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:01,964 INFO L225 Difference]: With dead ends: 243 [2022-04-06 14:33:01,964 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 14:33:01,964 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1717, Invalid=2975, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 14:33:01,964 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 667 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:01,964 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 37 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:33:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 14:33:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 84. [2022-04-06 14:33:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 3 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) [2022-04-06 14:33:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-04-06 14:33:02,000 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 81 [2022-04-06 14:33:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:02,000 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-04-06 14:33:02,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 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) [2022-04-06 14:33:02,000 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-04-06 14:33:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 14:33:02,001 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:02,001 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:02,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 14:33:02,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:02,211 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash -110883775, now seen corresponding path program 61 times [2022-04-06 14:33:02,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:02,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858580177] [2022-04-06 14:33:02,213 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:02,213 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:02,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:02,213 INFO L85 PathProgramCache]: Analyzing trace with hash -110883775, now seen corresponding path program 62 times [2022-04-06 14:33:02,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:02,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753923346] [2022-04-06 14:33:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:02,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:02,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:02,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753923346] [2022-04-06 14:33:02,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753923346] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361258599] [2022-04-06 14:33:02,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:33:02,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:02,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:02,558 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) [2022-04-06 14:33:02,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 14:33:02,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:33:02,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:02,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 14:33:02,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:02,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:03,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361258599] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:03,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:03,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 14:33:03,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:03,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858580177] [2022-04-06 14:33:03,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858580177] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:03,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:03,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 14:33:03,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009433348] [2022-04-06 14:33:03,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:03,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 14:33:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 14:33:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 14:33:03,680 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 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) [2022-04-06 14:33:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:04,781 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2022-04-06 14:33:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 14:33:04,781 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 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 83 [2022-04-06 14:33:04,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:04,782 INFO L225 Difference]: With dead ends: 250 [2022-04-06 14:33:04,782 INFO L226 Difference]: Without dead ends: 233 [2022-04-06 14:33:04,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 14:33:04,783 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 856 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:04,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 27 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:33:04,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-04-06 14:33:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 86. [2022-04-06 14:33:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 states have internal predecessors, (86), 3 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) [2022-04-06 14:33:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-04-06 14:33:04,807 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2022-04-06 14:33:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:04,807 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-04-06 14:33:04,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 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) [2022-04-06 14:33:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-04-06 14:33:04,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 14:33:04,808 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:04,808 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:04,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 14:33:05,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:05,009 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:05,009 INFO L85 PathProgramCache]: Analyzing trace with hash 199923551, now seen corresponding path program 63 times [2022-04-06 14:33:05,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:05,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1115681225] [2022-04-06 14:33:05,010 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:05,010 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:05,010 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:05,010 INFO L85 PathProgramCache]: Analyzing trace with hash 199923551, now seen corresponding path program 64 times [2022-04-06 14:33:05,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:05,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332660474] [2022-04-06 14:33:05,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:05,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:05,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:05,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332660474] [2022-04-06 14:33:05,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332660474] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847065782] [2022-04-06 14:33:05,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:33:05,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:05,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:05,365 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) [2022-04-06 14:33:05,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 14:33:05,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:33:05,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:05,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 14:33:05,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:05,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:06,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847065782] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:06,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:06,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 14:33:06,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:06,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1115681225] [2022-04-06 14:33:06,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1115681225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:06,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:06,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 14:33:06,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579754436] [2022-04-06 14:33:06,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:06,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 14:33:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 14:33:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 14:33:06,559 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 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) [2022-04-06 14:33:07,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:07,794 INFO L93 Difference]: Finished difference Result 257 states and 325 transitions. [2022-04-06 14:33:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 14:33:07,798 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 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 85 [2022-04-06 14:33:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:07,799 INFO L225 Difference]: With dead ends: 257 [2022-04-06 14:33:07,799 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 14:33:07,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 14:33:07,800 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 741 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:07,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 42 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:33:07,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 14:33:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 88. [2022-04-06 14:33:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 3 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) [2022-04-06 14:33:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-04-06 14:33:07,824 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2022-04-06 14:33:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:07,825 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-04-06 14:33:07,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 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) [2022-04-06 14:33:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-04-06 14:33:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 14:33:07,825 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:07,825 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:07,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 14:33:08,025 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,SelfDestructingSolverStorable34 [2022-04-06 14:33:08,026 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:08,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:08,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1761946883, now seen corresponding path program 65 times [2022-04-06 14:33:08,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:08,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [893003053] [2022-04-06 14:33:08,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:08,027 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:08,027 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:08,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1761946883, now seen corresponding path program 66 times [2022-04-06 14:33:08,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:08,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488868995] [2022-04-06 14:33:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:08,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:08,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:08,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:08,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488868995] [2022-04-06 14:33:08,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488868995] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:08,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703573976] [2022-04-06 14:33:08,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:33:08,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:08,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:08,456 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) [2022-04-06 14:33:08,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 14:33:08,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:33:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:08,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:33:08,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-04-06 14:33:08,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-04-06 14:33:08,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703573976] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:08,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:08,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 42 [2022-04-06 14:33:08,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:08,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [893003053] [2022-04-06 14:33:08,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [893003053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:08,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:08,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 14:33:08,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761093708] [2022-04-06 14:33:08,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:08,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 14:33:08,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 14:33:08,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 14:33:08,845 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 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) [2022-04-06 14:33:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:10,089 INFO L93 Difference]: Finished difference Result 264 states and 334 transitions. [2022-04-06 14:33:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 14:33:10,089 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 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 87 [2022-04-06 14:33:10,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:10,090 INFO L225 Difference]: With dead ends: 264 [2022-04-06 14:33:10,090 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 14:33:10,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2035, Invalid=3515, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 14:33:10,091 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 696 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:10,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 42 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:33:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 14:33:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 90. [2022-04-06 14:33:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 3 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) [2022-04-06 14:33:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-04-06 14:33:10,119 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2022-04-06 14:33:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:10,119 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-04-06 14:33:10,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 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) [2022-04-06 14:33:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-04-06 14:33:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 14:33:10,119 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:10,119 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:10,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 14:33:10,320 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,SelfDestructingSolverStorable35 [2022-04-06 14:33:10,320 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1628791013, now seen corresponding path program 67 times [2022-04-06 14:33:10,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:10,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1056272002] [2022-04-06 14:33:10,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:10,322 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:10,322 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:10,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1628791013, now seen corresponding path program 68 times [2022-04-06 14:33:10,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:10,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137602029] [2022-04-06 14:33:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:10,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:10,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:10,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:10,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137602029] [2022-04-06 14:33:10,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137602029] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:10,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54483753] [2022-04-06 14:33:10,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:33:10,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:10,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:10,732 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) [2022-04-06 14:33:10,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 14:33:10,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:33:10,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:10,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 14:33:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:11,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:12,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54483753] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:12,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:12,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 14:33:12,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:12,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1056272002] [2022-04-06 14:33:12,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1056272002] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:12,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:12,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 14:33:12,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489591123] [2022-04-06 14:33:12,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:12,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 14:33:12,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:12,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 14:33:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 14:33:12,075 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 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) [2022-04-06 14:33:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:13,398 INFO L93 Difference]: Finished difference Result 271 states and 343 transitions. [2022-04-06 14:33:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 14:33:13,399 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 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 89 [2022-04-06 14:33:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:13,399 INFO L225 Difference]: With dead ends: 271 [2022-04-06 14:33:13,400 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 14:33:13,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 14:33:13,400 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 888 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:13,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 32 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:33:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 14:33:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 92. [2022-04-06 14:33:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 3 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) [2022-04-06 14:33:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-04-06 14:33:13,432 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2022-04-06 14:33:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:13,432 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-04-06 14:33:13,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 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) [2022-04-06 14:33:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-04-06 14:33:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 14:33:13,433 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:13,433 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:13,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 14:33:13,637 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,SelfDestructingSolverStorable36 [2022-04-06 14:33:13,637 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1779948473, now seen corresponding path program 69 times [2022-04-06 14:33:13,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:13,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [349746739] [2022-04-06 14:33:13,639 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:13,639 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:13,639 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1779948473, now seen corresponding path program 70 times [2022-04-06 14:33:13,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:13,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770474738] [2022-04-06 14:33:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:13,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:14,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:14,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:14,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770474738] [2022-04-06 14:33:14,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770474738] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:14,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350749690] [2022-04-06 14:33:14,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:33:14,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:14,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:14,093 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) [2022-04-06 14:33:14,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 14:33:14,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:33:14,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:14,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 14:33:14,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:14,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:15,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350749690] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:15,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:15,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 14:33:15,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:15,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [349746739] [2022-04-06 14:33:15,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [349746739] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:15,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:15,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 14:33:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105957387] [2022-04-06 14:33:15,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:15,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 14:33:15,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 14:33:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 14:33:15,460 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 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) [2022-04-06 14:33:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:16,959 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2022-04-06 14:33:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 14:33:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 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 91 [2022-04-06 14:33:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:16,960 INFO L225 Difference]: With dead ends: 278 [2022-04-06 14:33:16,960 INFO L226 Difference]: Without dead ends: 261 [2022-04-06 14:33:16,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 14:33:16,961 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 798 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:16,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 47 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:33:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-04-06 14:33:16,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 94. [2022-04-06 14:33:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 3 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) [2022-04-06 14:33:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-04-06 14:33:16,991 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 91 [2022-04-06 14:33:16,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:16,991 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-04-06 14:33:16,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 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) [2022-04-06 14:33:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-04-06 14:33:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:33:16,992 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:16,992 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:17,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 14:33:17,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:17,203 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:17,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:17,203 INFO L85 PathProgramCache]: Analyzing trace with hash 518547671, now seen corresponding path program 71 times [2022-04-06 14:33:17,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:17,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813774126] [2022-04-06 14:33:17,205 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:17,205 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:17,205 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:17,205 INFO L85 PathProgramCache]: Analyzing trace with hash 518547671, now seen corresponding path program 72 times [2022-04-06 14:33:17,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:17,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264905429] [2022-04-06 14:33:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:17,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:17,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:17,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:17,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264905429] [2022-04-06 14:33:17,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264905429] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:17,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167589097] [2022-04-06 14:33:17,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:33:17,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:17,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:17,645 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) [2022-04-06 14:33:17,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 14:33:17,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:33:17,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:33:17,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-04-06 14:33:17,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-04-06 14:33:18,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167589097] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:18,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:18,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 7, 7] total 45 [2022-04-06 14:33:18,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:18,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813774126] [2022-04-06 14:33:18,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813774126] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:18,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:18,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 14:33:18,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245249397] [2022-04-06 14:33:18,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:18,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 14:33:18,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 14:33:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 14:33:18,046 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 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) [2022-04-06 14:33:19,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:19,624 INFO L93 Difference]: Finished difference Result 285 states and 361 transitions. [2022-04-06 14:33:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 14:33:19,624 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 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 93 [2022-04-06 14:33:19,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:19,625 INFO L225 Difference]: With dead ends: 285 [2022-04-06 14:33:19,625 INFO L226 Difference]: Without dead ends: 268 [2022-04-06 14:33:19,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2380, Invalid=4100, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 14:33:19,626 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 884 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:19,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 42 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:33:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-04-06 14:33:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 96. [2022-04-06 14:33:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 3 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) [2022-04-06 14:33:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-04-06 14:33:19,657 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2022-04-06 14:33:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:19,657 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-04-06 14:33:19,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 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) [2022-04-06 14:33:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-04-06 14:33:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 14:33:19,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:19,658 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:19,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 14:33:19,875 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,SelfDestructingSolverStorable38 [2022-04-06 14:33:19,875 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash -506845579, now seen corresponding path program 73 times [2022-04-06 14:33:19,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:19,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1201993651] [2022-04-06 14:33:19,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:19,877 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:19,877 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:19,877 INFO L85 PathProgramCache]: Analyzing trace with hash -506845579, now seen corresponding path program 74 times [2022-04-06 14:33:19,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:19,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029182264] [2022-04-06 14:33:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:19,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:20,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:20,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:20,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029182264] [2022-04-06 14:33:20,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029182264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:20,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97627295] [2022-04-06 14:33:20,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:33:20,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:20,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:20,355 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) [2022-04-06 14:33:20,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 14:33:20,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:33:20,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:20,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 14:33:20,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:20,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:21,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97627295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:21,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:21,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 14:33:21,868 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:21,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1201993651] [2022-04-06 14:33:21,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1201993651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:21,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:21,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 14:33:21,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418510989] [2022-04-06 14:33:21,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:21,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 14:33:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 14:33:21,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 14:33:21,869 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 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) [2022-04-06 14:33:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:23,488 INFO L93 Difference]: Finished difference Result 292 states and 370 transitions. [2022-04-06 14:33:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 14:33:23,489 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 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 95 [2022-04-06 14:33:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:23,489 INFO L225 Difference]: With dead ends: 292 [2022-04-06 14:33:23,490 INFO L226 Difference]: Without dead ends: 275 [2022-04-06 14:33:23,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 14:33:23,490 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 727 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:23,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 47 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:33:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-06 14:33:23,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 98. [2022-04-06 14:33:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.053763440860215) internal successors, (98), 93 states have internal predecessors, (98), 3 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) [2022-04-06 14:33:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-04-06 14:33:23,533 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 95 [2022-04-06 14:33:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:23,533 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-04-06 14:33:23,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 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) [2022-04-06 14:33:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-04-06 14:33:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 14:33:23,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:23,534 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:23,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 14:33:23,747 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,SelfDestructingSolverStorable39 [2022-04-06 14:33:23,747 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1932719251, now seen corresponding path program 75 times [2022-04-06 14:33:23,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:23,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2139789154] [2022-04-06 14:33:23,749 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:23,749 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:23,749 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:23,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1932719251, now seen corresponding path program 76 times [2022-04-06 14:33:23,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:23,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973142964] [2022-04-06 14:33:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:23,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:24,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:24,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:24,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973142964] [2022-04-06 14:33:24,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973142964] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:24,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831475249] [2022-04-06 14:33:24,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:33:24,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:24,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:24,268 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) [2022-04-06 14:33:24,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 14:33:24,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:33:24,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:24,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 14:33:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:24,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:25,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831475249] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:25,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:25,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 14:33:25,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:25,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2139789154] [2022-04-06 14:33:25,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2139789154] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:25,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:25,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 14:33:25,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907123907] [2022-04-06 14:33:25,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:25,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 14:33:25,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:25,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 14:33:25,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 14:33:25,885 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 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) [2022-04-06 14:33:27,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:27,699 INFO L93 Difference]: Finished difference Result 299 states and 379 transitions. [2022-04-06 14:33:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 14:33:27,699 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 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 97 [2022-04-06 14:33:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:27,700 INFO L225 Difference]: With dead ends: 299 [2022-04-06 14:33:27,700 INFO L226 Difference]: Without dead ends: 282 [2022-04-06 14:33:27,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 14:33:27,701 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 904 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:27,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 42 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:33:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-04-06 14:33:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 100. [2022-04-06 14:33:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 3 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) [2022-04-06 14:33:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2022-04-06 14:33:27,742 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 97 [2022-04-06 14:33:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:27,742 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2022-04-06 14:33:27,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 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) [2022-04-06 14:33:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2022-04-06 14:33:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 14:33:27,742 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:27,742 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:27,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-06 14:33:27,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:27,955 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1302377265, now seen corresponding path program 77 times [2022-04-06 14:33:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:27,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1226857105] [2022-04-06 14:33:27,957 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:27,957 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:27,957 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:27,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1302377265, now seen corresponding path program 78 times [2022-04-06 14:33:27,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:27,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966940634] [2022-04-06 14:33:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:27,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:28,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:28,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:28,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966940634] [2022-04-06 14:33:28,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966940634] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:28,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333981301] [2022-04-06 14:33:28,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:33:28,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:28,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:28,444 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) [2022-04-06 14:33:28,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 14:33:28,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:33:28,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:28,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:33:28,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-04-06 14:33:28,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-04-06 14:33:28,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333981301] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:28,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:28,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 7, 7] total 48 [2022-04-06 14:33:28,872 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:28,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1226857105] [2022-04-06 14:33:28,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1226857105] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:28,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:28,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 14:33:28,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789030741] [2022-04-06 14:33:28,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:28,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 14:33:28,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:28,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 14:33:28,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 14:33:28,873 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 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) [2022-04-06 14:33:30,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:30,753 INFO L93 Difference]: Finished difference Result 306 states and 388 transitions. [2022-04-06 14:33:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 14:33:30,753 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 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 99 [2022-04-06 14:33:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:30,754 INFO L225 Difference]: With dead ends: 306 [2022-04-06 14:33:30,754 INFO L226 Difference]: Without dead ends: 289 [2022-04-06 14:33:30,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2752, Invalid=4730, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 14:33:30,755 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 841 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:30,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 42 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:33:30,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-04-06 14:33:30,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 102. [2022-04-06 14:33:30,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 3 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) [2022-04-06 14:33:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-04-06 14:33:30,802 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2022-04-06 14:33:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:30,802 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-04-06 14:33:30,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 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) [2022-04-06 14:33:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-04-06 14:33:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 14:33:30,802 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:30,802 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:30,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 14:33:31,003 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,SelfDestructingSolverStorable41 [2022-04-06 14:33:31,003 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:31,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1134117455, now seen corresponding path program 79 times [2022-04-06 14:33:31,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:31,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1171856475] [2022-04-06 14:33:31,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:31,005 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:31,005 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1134117455, now seen corresponding path program 80 times [2022-04-06 14:33:31,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:31,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101355408] [2022-04-06 14:33:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:31,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:31,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:31,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:31,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101355408] [2022-04-06 14:33:31,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101355408] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:31,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500635215] [2022-04-06 14:33:31,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:33:31,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:31,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:31,532 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) [2022-04-06 14:33:31,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 14:33:31,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:33:31,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 14:33:31,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:31,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:33,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500635215] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:33,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:33,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 14:33:33,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:33,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1171856475] [2022-04-06 14:33:33,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1171856475] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:33,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:33,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 14:33:33,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746469143] [2022-04-06 14:33:33,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:33,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 14:33:33,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 14:33:33,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 14:33:33,292 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 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) [2022-04-06 14:33:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:35,355 INFO L93 Difference]: Finished difference Result 313 states and 397 transitions. [2022-04-06 14:33:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 14:33:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 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 101 [2022-04-06 14:33:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:35,357 INFO L225 Difference]: With dead ends: 313 [2022-04-06 14:33:35,357 INFO L226 Difference]: Without dead ends: 296 [2022-04-06 14:33:35,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 14:33:35,358 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 982 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:35,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 32 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:33:35,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-04-06 14:33:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 104. [2022-04-06 14:33:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 3 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) [2022-04-06 14:33:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-04-06 14:33:35,403 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2022-04-06 14:33:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:35,403 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-04-06 14:33:35,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 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) [2022-04-06 14:33:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-04-06 14:33:35,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 14:33:35,403 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:35,403 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:35,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 14:33:35,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:35,619 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1649770003, now seen corresponding path program 81 times [2022-04-06 14:33:35,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:35,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1290295716] [2022-04-06 14:33:35,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:35,621 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:35,621 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:35,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1649770003, now seen corresponding path program 82 times [2022-04-06 14:33:35,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:35,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982283331] [2022-04-06 14:33:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:35,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:36,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:36,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:36,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982283331] [2022-04-06 14:33:36,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982283331] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:36,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621875657] [2022-04-06 14:33:36,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:33:36,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:36,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:36,164 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) [2022-04-06 14:33:36,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 14:33:36,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:33:36,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:36,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 14:33:36,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:36,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:37,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621875657] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:37,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:37,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 14:33:37,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:37,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1290295716] [2022-04-06 14:33:37,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1290295716] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:37,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:37,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 14:33:37,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063376042] [2022-04-06 14:33:37,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:37,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 14:33:37,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:37,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 14:33:37,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 14:33:37,969 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 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) [2022-04-06 14:33:40,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:40,192 INFO L93 Difference]: Finished difference Result 320 states and 406 transitions. [2022-04-06 14:33:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 14:33:40,192 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 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 103 [2022-04-06 14:33:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:40,193 INFO L225 Difference]: With dead ends: 320 [2022-04-06 14:33:40,193 INFO L226 Difference]: Without dead ends: 303 [2022-04-06 14:33:40,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 14:33:40,194 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1034 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:40,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 37 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:33:40,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-04-06 14:33:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 106. [2022-04-06 14:33:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 3 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) [2022-04-06 14:33:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-04-06 14:33:40,237 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 103 [2022-04-06 14:33:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:40,237 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-04-06 14:33:40,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 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) [2022-04-06 14:33:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-04-06 14:33:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 14:33:40,237 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:40,238 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:40,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-04-06 14:33:40,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:40,438 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:40,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:40,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1200991733, now seen corresponding path program 83 times [2022-04-06 14:33:40,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:40,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1556682610] [2022-04-06 14:33:40,440 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:40,440 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:40,440 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:40,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1200991733, now seen corresponding path program 84 times [2022-04-06 14:33:40,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:40,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175706062] [2022-04-06 14:33:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:40,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:40,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:41,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:41,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175706062] [2022-04-06 14:33:41,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175706062] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:41,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923224808] [2022-04-06 14:33:41,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:33:41,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:41,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:41,002 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) [2022-04-06 14:33:41,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 14:33:41,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:33:41,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:33:41,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-04-06 14:33:41,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-04-06 14:33:41,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923224808] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:41,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:41,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 7] total 51 [2022-04-06 14:33:41,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:41,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1556682610] [2022-04-06 14:33:41,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1556682610] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:41,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:41,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 14:33:41,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644244583] [2022-04-06 14:33:41,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:41,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 14:33:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:41,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 14:33:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 14:33:41,481 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 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) [2022-04-06 14:33:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:43,767 INFO L93 Difference]: Finished difference Result 327 states and 415 transitions. [2022-04-06 14:33:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 14:33:43,767 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 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 105 [2022-04-06 14:33:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:43,768 INFO L225 Difference]: With dead ends: 327 [2022-04-06 14:33:43,768 INFO L226 Difference]: Without dead ends: 310 [2022-04-06 14:33:43,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3151, Invalid=5405, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 14:33:43,769 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1070 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:43,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1070 Valid, 27 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:33:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-04-06 14:33:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 108. [2022-04-06 14:33:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 3 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) [2022-04-06 14:33:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-04-06 14:33:43,817 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 105 [2022-04-06 14:33:43,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:43,817 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-04-06 14:33:43,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 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) [2022-04-06 14:33:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-04-06 14:33:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 14:33:43,817 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:43,817 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:43,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 14:33:44,018 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,SelfDestructingSolverStorable44 [2022-04-06 14:33:44,018 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:44,018 INFO L85 PathProgramCache]: Analyzing trace with hash 578196137, now seen corresponding path program 85 times [2022-04-06 14:33:44,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:44,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [734310259] [2022-04-06 14:33:44,020 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:44,020 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:44,020 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash 578196137, now seen corresponding path program 86 times [2022-04-06 14:33:44,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:44,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456419602] [2022-04-06 14:33:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:44,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:44,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:44,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456419602] [2022-04-06 14:33:44,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456419602] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717632194] [2022-04-06 14:33:44,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:33:44,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:44,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:44,641 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) [2022-04-06 14:33:44,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 14:33:44,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:33:44,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:44,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 14:33:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:45,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:46,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717632194] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:46,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:46,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 14:33:46,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:46,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [734310259] [2022-04-06 14:33:46,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [734310259] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:46,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:46,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 14:33:46,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148814389] [2022-04-06 14:33:46,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:46,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 14:33:46,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:46,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 14:33:46,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 14:33:46,657 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 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) [2022-04-06 14:33:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:49,163 INFO L93 Difference]: Finished difference Result 334 states and 424 transitions. [2022-04-06 14:33:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 14:33:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 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 107 [2022-04-06 14:33:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:49,165 INFO L225 Difference]: With dead ends: 334 [2022-04-06 14:33:49,165 INFO L226 Difference]: Without dead ends: 317 [2022-04-06 14:33:49,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 14:33:49,166 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 924 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:49,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 32 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:33:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-04-06 14:33:49,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 110. [2022-04-06 14:33:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 3 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) [2022-04-06 14:33:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-04-06 14:33:49,213 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2022-04-06 14:33:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:49,213 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-04-06 14:33:49,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 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) [2022-04-06 14:33:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-04-06 14:33:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 14:33:49,213 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:49,213 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:49,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 14:33:49,414 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,SelfDestructingSolverStorable45 [2022-04-06 14:33:49,414 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:49,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:49,414 INFO L85 PathProgramCache]: Analyzing trace with hash 980755399, now seen corresponding path program 87 times [2022-04-06 14:33:49,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:49,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [965640563] [2022-04-06 14:33:49,416 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:49,416 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:49,416 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:49,416 INFO L85 PathProgramCache]: Analyzing trace with hash 980755399, now seen corresponding path program 88 times [2022-04-06 14:33:49,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:49,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735621678] [2022-04-06 14:33:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:49,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:50,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:50,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735621678] [2022-04-06 14:33:50,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735621678] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595175283] [2022-04-06 14:33:50,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:33:50,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:50,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:50,072 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) [2022-04-06 14:33:50,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 14:33:50,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:33:50,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 14:33:50,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:50,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:52,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595175283] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:52,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:52,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 14:33:52,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:52,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [965640563] [2022-04-06 14:33:52,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [965640563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:52,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:52,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 14:33:52,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932147767] [2022-04-06 14:33:52,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:52,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 14:33:52,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:52,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 14:33:52,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 14:33:52,113 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 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) [2022-04-06 14:33:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:54,757 INFO L93 Difference]: Finished difference Result 341 states and 433 transitions. [2022-04-06 14:33:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 14:33:54,757 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 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 109 [2022-04-06 14:33:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:54,758 INFO L225 Difference]: With dead ends: 341 [2022-04-06 14:33:54,758 INFO L226 Difference]: Without dead ends: 324 [2022-04-06 14:33:54,759 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 14:33:54,759 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1004 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:54,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 57 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:33:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-04-06 14:33:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 112. [2022-04-06 14:33:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 3 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) [2022-04-06 14:33:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-04-06 14:33:54,806 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2022-04-06 14:33:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:54,807 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-04-06 14:33:54,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 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) [2022-04-06 14:33:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-04-06 14:33:54,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 14:33:54,807 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:54,807 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:54,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 14:33:55,011 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,SelfDestructingSolverStorable46 [2022-04-06 14:33:55,011 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:55,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1293149541, now seen corresponding path program 89 times [2022-04-06 14:33:55,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:55,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [483956707] [2022-04-06 14:33:55,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:55,013 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:55,013 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:55,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1293149541, now seen corresponding path program 90 times [2022-04-06 14:33:55,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:55,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707737044] [2022-04-06 14:33:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:55,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:55,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:55,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:55,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707737044] [2022-04-06 14:33:55,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707737044] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:55,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007127952] [2022-04-06 14:33:55,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:33:55,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:55,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:55,667 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) [2022-04-06 14:33:55,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 14:33:55,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:33:55,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:33:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-04-06 14:33:55,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-04-06 14:33:56,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007127952] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:56,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:56,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 54 [2022-04-06 14:33:56,182 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:56,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [483956707] [2022-04-06 14:33:56,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [483956707] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:56,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:56,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 14:33:56,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557560753] [2022-04-06 14:33:56,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:56,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 14:33:56,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:56,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 14:33:56,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 14:33:56,183 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 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) [2022-04-06 14:33:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:58,862 INFO L93 Difference]: Finished difference Result 348 states and 442 transitions. [2022-04-06 14:33:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 14:33:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 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 111 [2022-04-06 14:33:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:58,863 INFO L225 Difference]: With dead ends: 348 [2022-04-06 14:33:58,863 INFO L226 Difference]: Without dead ends: 331 [2022-04-06 14:33:58,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3577, Invalid=6125, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 14:33:58,864 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1206 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:58,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 37 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:33:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-04-06 14:33:58,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 114. [2022-04-06 14:33:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 3 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) [2022-04-06 14:33:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2022-04-06 14:33:58,914 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2022-04-06 14:33:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:58,914 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2022-04-06 14:33:58,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 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) [2022-04-06 14:33:58,914 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2022-04-06 14:33:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 14:33:58,915 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:58,915 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:58,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 14:33:59,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:59,127 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:59,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 856209283, now seen corresponding path program 91 times [2022-04-06 14:33:59,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:59,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1666500725] [2022-04-06 14:33:59,129 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:59,129 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:59,129 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:59,129 INFO L85 PathProgramCache]: Analyzing trace with hash 856209283, now seen corresponding path program 92 times [2022-04-06 14:33:59,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:59,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127897448] [2022-04-06 14:33:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:59,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:59,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:33:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:59,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127897448] [2022-04-06 14:33:59,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127897448] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579789618] [2022-04-06 14:33:59,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:33:59,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:59,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:59,795 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) [2022-04-06 14:33:59,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 14:34:00,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:34:00,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:00,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 14:34:00,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:00,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:01,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579789618] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:34:01,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:34:01,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-04-06 14:34:01,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:01,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1666500725] [2022-04-06 14:34:01,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1666500725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:01,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:01,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 14:34:01,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698107466] [2022-04-06 14:34:01,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:01,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 14:34:01,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:01,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 14:34:01,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 14:34:01,990 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 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) [2022-04-06 14:34:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:04,849 INFO L93 Difference]: Finished difference Result 355 states and 451 transitions. [2022-04-06 14:34:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 14:34:04,849 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 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 113 [2022-04-06 14:34:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:04,850 INFO L225 Difference]: With dead ends: 355 [2022-04-06 14:34:04,850 INFO L226 Difference]: Without dead ends: 338 [2022-04-06 14:34:04,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 14:34:04,851 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1023 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:04,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 37 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:34:04,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-04-06 14:34:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 116. [2022-04-06 14:34:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 3 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) [2022-04-06 14:34:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-04-06 14:34:04,915 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2022-04-06 14:34:04,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:04,915 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-04-06 14:34:04,915 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 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) [2022-04-06 14:34:04,915 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-04-06 14:34:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 14:34:04,916 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:04,916 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:04,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 14:34:05,116 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,SelfDestructingSolverStorable48 [2022-04-06 14:34:05,116 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:05,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1863416353, now seen corresponding path program 93 times [2022-04-06 14:34:05,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:05,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1652455352] [2022-04-06 14:34:05,118 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:05,118 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:05,118 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1863416353, now seen corresponding path program 94 times [2022-04-06 14:34:05,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:05,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35088657] [2022-04-06 14:34:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:05,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:05,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:05,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:05,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35088657] [2022-04-06 14:34:05,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35088657] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:05,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522996488] [2022-04-06 14:34:05,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:34:05,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:05,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:05,864 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) [2022-04-06 14:34:05,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 14:34:06,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:34:06,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:06,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 14:34:06,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:06,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:08,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522996488] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:34:08,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:34:08,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-04-06 14:34:08,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:08,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1652455352] [2022-04-06 14:34:08,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1652455352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:08,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:08,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 14:34:08,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211950920] [2022-04-06 14:34:08,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:08,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 14:34:08,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:08,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 14:34:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 14:34:08,131 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 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) [2022-04-06 14:34:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:11,251 INFO L93 Difference]: Finished difference Result 362 states and 460 transitions. [2022-04-06 14:34:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 14:34:11,252 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 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 115 [2022-04-06 14:34:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:11,253 INFO L225 Difference]: With dead ends: 362 [2022-04-06 14:34:11,253 INFO L226 Difference]: Without dead ends: 345 [2022-04-06 14:34:11,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 14:34:11,254 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 993 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:11,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 62 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:34:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-04-06 14:34:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 118. [2022-04-06 14:34:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 states have internal predecessors, (118), 3 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) [2022-04-06 14:34:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2022-04-06 14:34:11,309 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 115 [2022-04-06 14:34:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:11,309 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2022-04-06 14:34:11,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 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) [2022-04-06 14:34:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2022-04-06 14:34:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 14:34:11,310 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:11,310 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:11,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-04-06 14:34:11,510 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,SelfDestructingSolverStorable49 [2022-04-06 14:34:11,510 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:11,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:11,511 INFO L85 PathProgramCache]: Analyzing trace with hash -873198273, now seen corresponding path program 95 times [2022-04-06 14:34:11,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:11,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [717035955] [2022-04-06 14:34:11,512 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:11,512 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:11,512 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:11,512 INFO L85 PathProgramCache]: Analyzing trace with hash -873198273, now seen corresponding path program 96 times [2022-04-06 14:34:11,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:11,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47986798] [2022-04-06 14:34:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:11,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:12,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:12,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:12,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47986798] [2022-04-06 14:34:12,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47986798] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:12,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173760885] [2022-04-06 14:34:12,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:34:12,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:12,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:12,232 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) [2022-04-06 14:34:12,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 14:34:12,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:34:12,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:12,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:34:12,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-04-06 14:34:12,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-04-06 14:34:12,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173760885] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:34:12,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:34:12,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 7, 7] total 57 [2022-04-06 14:34:12,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:12,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [717035955] [2022-04-06 14:34:12,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [717035955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:12,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:12,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 14:34:12,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662530378] [2022-04-06 14:34:12,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:12,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 14:34:12,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:12,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 14:34:12,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1755, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 14:34:12,767 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 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) [2022-04-06 14:34:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:16,049 INFO L93 Difference]: Finished difference Result 369 states and 469 transitions. [2022-04-06 14:34:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 14:34:16,049 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 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 117 [2022-04-06 14:34:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:16,050 INFO L225 Difference]: With dead ends: 369 [2022-04-06 14:34:16,051 INFO L226 Difference]: Without dead ends: 352 [2022-04-06 14:34:16,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4030, Invalid=6890, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 14:34:16,051 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1560 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:16,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 27 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:34:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-04-06 14:34:16,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 120. [2022-04-06 14:34:16,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 3 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) [2022-04-06 14:34:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-04-06 14:34:16,110 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 117 [2022-04-06 14:34:16,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:16,111 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-04-06 14:34:16,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 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) [2022-04-06 14:34:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-04-06 14:34:16,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 14:34:16,111 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:16,111 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:16,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 14:34:16,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:16,329 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:16,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2055098589, now seen corresponding path program 97 times [2022-04-06 14:34:16,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:16,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [998430099] [2022-04-06 14:34:16,330 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:16,330 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:16,330 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2055098589, now seen corresponding path program 98 times [2022-04-06 14:34:16,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:16,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806755156] [2022-04-06 14:34:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:16,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:17,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:17,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:17,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806755156] [2022-04-06 14:34:17,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806755156] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:17,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295409607] [2022-04-06 14:34:17,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:34:17,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:17,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:17,124 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) [2022-04-06 14:34:17,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 14:34:17,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:34:17,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 14:34:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:17,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:19,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295409607] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:34:19,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:34:19,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 14:34:19,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:19,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [998430099] [2022-04-06 14:34:19,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [998430099] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:19,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:19,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 14:34:19,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881473786] [2022-04-06 14:34:19,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:19,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 14:34:19,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:19,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 14:34:19,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 14:34:19,619 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 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) [2022-04-06 14:34:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:23,114 INFO L93 Difference]: Finished difference Result 376 states and 478 transitions. [2022-04-06 14:34:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 14:34:23,114 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 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 119 [2022-04-06 14:34:23,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:23,115 INFO L225 Difference]: With dead ends: 376 [2022-04-06 14:34:23,115 INFO L226 Difference]: Without dead ends: 359 [2022-04-06 14:34:23,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 14:34:23,117 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1083 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:23,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 47 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:34:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-06 14:34:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 122. [2022-04-06 14:34:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 states have internal predecessors, (122), 3 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) [2022-04-06 14:34:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-04-06 14:34:23,178 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2022-04-06 14:34:23,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:23,178 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-04-06 14:34:23,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 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) [2022-04-06 14:34:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-04-06 14:34:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 14:34:23,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:23,179 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:23,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 14:34:23,379 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,SelfDestructingSolverStorable51 [2022-04-06 14:34:23,380 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:23,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1350163205, now seen corresponding path program 99 times [2022-04-06 14:34:23,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:23,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67744889] [2022-04-06 14:34:23,381 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:23,381 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:23,381 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:23,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1350163205, now seen corresponding path program 100 times [2022-04-06 14:34:23,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:23,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840424449] [2022-04-06 14:34:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:23,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:24,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:24,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:24,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840424449] [2022-04-06 14:34:24,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840424449] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:24,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234257077] [2022-04-06 14:34:24,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:34:24,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:24,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:24,197 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) [2022-04-06 14:34:24,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 14:34:24,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:34:24,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:24,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 14:34:24,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:24,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:26,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234257077] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:34:26,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:34:26,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-04-06 14:34:26,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:26,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67744889] [2022-04-06 14:34:26,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67744889] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:26,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:26,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 14:34:26,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701785805] [2022-04-06 14:34:26,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:26,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 14:34:26,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 14:34:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 14:34:26,839 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 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) [2022-04-06 14:34:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:30,505 INFO L93 Difference]: Finished difference Result 383 states and 487 transitions. [2022-04-06 14:34:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 14:34:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 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 121 [2022-04-06 14:34:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:30,507 INFO L225 Difference]: With dead ends: 383 [2022-04-06 14:34:30,507 INFO L226 Difference]: Without dead ends: 366 [2022-04-06 14:34:30,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 14:34:30,508 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1454 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:30,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1454 Valid, 42 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:34:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-04-06 14:34:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 124. [2022-04-06 14:34:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 3 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) [2022-04-06 14:34:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2022-04-06 14:34:30,586 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2022-04-06 14:34:30,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:30,586 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2022-04-06 14:34:30,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 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) [2022-04-06 14:34:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2022-04-06 14:34:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 14:34:30,586 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:30,587 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:30,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 14:34:30,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:30,800 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1041667687, now seen corresponding path program 101 times [2022-04-06 14:34:30,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:30,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2138724974] [2022-04-06 14:34:30,801 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:30,801 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:30,801 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1041667687, now seen corresponding path program 102 times [2022-04-06 14:34:30,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:30,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934909188] [2022-04-06 14:34:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:30,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:31,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:31,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:31,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934909188] [2022-04-06 14:34:31,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934909188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:31,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45650878] [2022-04-06 14:34:31,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:34:31,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:31,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:31,647 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) [2022-04-06 14:34:31,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 14:34:31,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:34:31,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:31,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:34:31,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-04-06 14:34:32,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-04-06 14:34:32,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45650878] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:34:32,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:34:32,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 7, 7] total 60 [2022-04-06 14:34:32,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2138724974] [2022-04-06 14:34:32,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2138724974] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:32,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:32,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 14:34:32,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275121553] [2022-04-06 14:34:32,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:32,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 14:34:32,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 14:34:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1602, Invalid=1938, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 14:34:32,247 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 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) [2022-04-06 14:34:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:35,948 INFO L93 Difference]: Finished difference Result 390 states and 496 transitions. [2022-04-06 14:34:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 14:34:35,948 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 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 123 [2022-04-06 14:34:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:35,949 INFO L225 Difference]: With dead ends: 390 [2022-04-06 14:34:35,950 INFO L226 Difference]: Without dead ends: 373 [2022-04-06 14:34:35,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4510, Invalid=7700, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 14:34:35,950 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1435 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:35,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 37 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:34:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-04-06 14:34:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 126. [2022-04-06 14:34:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 3 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) [2022-04-06 14:34:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-04-06 14:34:36,019 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2022-04-06 14:34:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:36,019 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-04-06 14:34:36,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 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) [2022-04-06 14:34:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-04-06 14:34:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 14:34:36,020 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:36,020 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:36,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-04-06 14:34:36,231 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,SelfDestructingSolverStorable53 [2022-04-06 14:34:36,231 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:36,231 INFO L85 PathProgramCache]: Analyzing trace with hash -930218313, now seen corresponding path program 103 times [2022-04-06 14:34:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:36,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1037066386] [2022-04-06 14:34:36,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:36,233 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:36,233 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:36,233 INFO L85 PathProgramCache]: Analyzing trace with hash -930218313, now seen corresponding path program 104 times [2022-04-06 14:34:36,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910438483] [2022-04-06 14:34:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:37,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:37,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:37,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910438483] [2022-04-06 14:34:37,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910438483] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:37,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954291350] [2022-04-06 14:34:37,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:34:37,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:37,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:37,097 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) [2022-04-06 14:34:37,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 14:34:37,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:34:37,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:37,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 14:34:37,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:37,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:39,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954291350] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:34:39,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:34:39,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-04-06 14:34:39,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:39,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1037066386] [2022-04-06 14:34:39,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1037066386] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:39,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:39,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 14:34:39,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886508354] [2022-04-06 14:34:39,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:39,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 14:34:39,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:39,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 14:34:39,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 14:34:39,899 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 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) [2022-04-06 14:34:43,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:43,881 INFO L93 Difference]: Finished difference Result 397 states and 505 transitions. [2022-04-06 14:34:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 14:34:43,881 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 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 125 [2022-04-06 14:34:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:43,882 INFO L225 Difference]: With dead ends: 397 [2022-04-06 14:34:43,882 INFO L226 Difference]: Without dead ends: 380 [2022-04-06 14:34:43,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 14:34:43,883 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:43,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 47 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:34:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-04-06 14:34:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 128. [2022-04-06 14:34:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 3 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) [2022-04-06 14:34:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2022-04-06 14:34:43,953 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2022-04-06 14:34:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:43,953 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2022-04-06 14:34:43,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 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) [2022-04-06 14:34:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2022-04-06 14:34:43,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 14:34:43,953 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:43,953 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:43,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 14:34:44,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 14:34:44,164 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:44,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:44,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1201552299, now seen corresponding path program 105 times [2022-04-06 14:34:44,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:44,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1654528118] [2022-04-06 14:34:44,166 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:44,166 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:44,166 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:44,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1201552299, now seen corresponding path program 106 times [2022-04-06 14:34:44,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:44,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644781601] [2022-04-06 14:34:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:44,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:45,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:45,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644781601] [2022-04-06 14:34:45,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644781601] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:45,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384489841] [2022-04-06 14:34:45,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:34:45,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:45,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:45,040 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) [2022-04-06 14:34:45,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 14:34:45,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:34:45,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 14:34:45,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:45,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:47,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384489841] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:34:47,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:34:47,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-04-06 14:34:47,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:47,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1654528118] [2022-04-06 14:34:47,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1654528118] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:47,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:47,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 14:34:47,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383613129] [2022-04-06 14:34:47,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:47,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 14:34:47,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:47,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 14:34:47,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 14:34:47,897 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 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) [2022-04-06 14:34:52,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:52,156 INFO L93 Difference]: Finished difference Result 404 states and 514 transitions. [2022-04-06 14:34:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 14:34:52,157 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 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 127 [2022-04-06 14:34:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:52,158 INFO L225 Difference]: With dead ends: 404 [2022-04-06 14:34:52,158 INFO L226 Difference]: Without dead ends: 387 [2022-04-06 14:34:52,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 14:34:52,159 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1301 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:52,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 37 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:34:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-04-06 14:34:52,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 130. [2022-04-06 14:34:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 3 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) [2022-04-06 14:34:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-04-06 14:34:52,232 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2022-04-06 14:34:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:52,232 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-04-06 14:34:52,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 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) [2022-04-06 14:34:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-04-06 14:34:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 14:34:52,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:52,233 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:52,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-06 14:34:52,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:52,435 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:52,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash 39492211, now seen corresponding path program 107 times [2022-04-06 14:34:52,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1025321755] [2022-04-06 14:34:52,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:52,437 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:52,437 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:52,437 INFO L85 PathProgramCache]: Analyzing trace with hash 39492211, now seen corresponding path program 108 times [2022-04-06 14:34:52,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:52,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204536568] [2022-04-06 14:34:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:52,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:53,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:53,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:53,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204536568] [2022-04-06 14:34:53,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204536568] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:53,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979239682] [2022-04-06 14:34:53,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:34:53,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:53,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:53,348 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) [2022-04-06 14:34:53,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 14:34:53,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:34:53,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:53,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:34:53,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-04-06 14:34:53,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-04-06 14:34:53,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979239682] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:34:53,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:34:53,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 7, 7] total 63 [2022-04-06 14:34:53,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:53,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1025321755] [2022-04-06 14:34:53,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1025321755] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:53,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:53,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 14:34:53,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707379302] [2022-04-06 14:34:53,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:53,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 14:34:53,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 14:34:53,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1776, Invalid=2130, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 14:34:53,956 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 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) [2022-04-06 14:34:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:58,390 INFO L93 Difference]: Finished difference Result 411 states and 523 transitions. [2022-04-06 14:34:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 14:34:58,394 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 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 129 [2022-04-06 14:34:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:58,395 INFO L225 Difference]: With dead ends: 411 [2022-04-06 14:34:58,395 INFO L226 Difference]: Without dead ends: 394 [2022-04-06 14:34:58,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5017, Invalid=8555, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 14:34:58,396 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1238 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:58,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 37 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:34:58,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-04-06 14:34:58,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 132. [2022-04-06 14:34:58,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 3 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) [2022-04-06 14:34:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-04-06 14:34:58,471 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2022-04-06 14:34:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:58,471 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-04-06 14:34:58,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 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) [2022-04-06 14:34:58,472 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-04-06 14:34:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 14:34:58,472 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:58,472 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:58,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-06 14:34:58,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:58,673 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:58,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1317641967, now seen corresponding path program 109 times [2022-04-06 14:34:58,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:58,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [469156223] [2022-04-06 14:34:58,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:58,674 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:58,674 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1317641967, now seen corresponding path program 110 times [2022-04-06 14:34:58,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:58,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541800556] [2022-04-06 14:34:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:58,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:59,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:34:59,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:59,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541800556] [2022-04-06 14:34:59,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541800556] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:59,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768805857] [2022-04-06 14:34:59,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:34:59,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:59,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:59,634 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) [2022-04-06 14:34:59,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 14:34:59,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:34:59,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:59,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 14:34:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:00,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:02,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768805857] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:35:02,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:35:02,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-04-06 14:35:02,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:02,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [469156223] [2022-04-06 14:35:02,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [469156223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:02,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:02,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 14:35:02,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492752956] [2022-04-06 14:35:02,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:02,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 14:35:02,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:02,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 14:35:02,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 14:35:02,682 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 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) [2022-04-06 14:35:07,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:07,498 INFO L93 Difference]: Finished difference Result 418 states and 532 transitions. [2022-04-06 14:35:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 14:35:07,499 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 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 131 [2022-04-06 14:35:07,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:07,500 INFO L225 Difference]: With dead ends: 418 [2022-04-06 14:35:07,500 INFO L226 Difference]: Without dead ends: 401 [2022-04-06 14:35:07,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 14:35:07,501 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1614 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1614 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:07,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1614 Valid, 27 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:35:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-04-06 14:35:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 134. [2022-04-06 14:35:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 129 states have internal predecessors, (134), 3 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) [2022-04-06 14:35:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2022-04-06 14:35:07,586 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 131 [2022-04-06 14:35:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:07,586 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2022-04-06 14:35:07,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 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) [2022-04-06 14:35:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2022-04-06 14:35:07,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 14:35:07,587 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:07,587 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:07,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-06 14:35:07,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:07,788 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:07,788 INFO L85 PathProgramCache]: Analyzing trace with hash 146470959, now seen corresponding path program 111 times [2022-04-06 14:35:07,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:07,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1071702197] [2022-04-06 14:35:07,789 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:07,789 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:07,789 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash 146470959, now seen corresponding path program 112 times [2022-04-06 14:35:07,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:07,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336829632] [2022-04-06 14:35:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:07,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:08,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:08,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:08,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336829632] [2022-04-06 14:35:08,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336829632] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:08,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547561674] [2022-04-06 14:35:08,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:35:08,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:08,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:08,742 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:35:08,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 14:35:09,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:35:09,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:09,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 14:35:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:09,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:11,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547561674] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:35:11,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:35:11,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-04-06 14:35:11,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:11,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1071702197] [2022-04-06 14:35:11,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1071702197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:11,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:11,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 14:35:11,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087786961] [2022-04-06 14:35:11,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:11,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 14:35:11,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:11,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 14:35:11,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 14:35:11,881 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 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) [2022-04-06 14:35:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:16,984 INFO L93 Difference]: Finished difference Result 425 states and 541 transitions. [2022-04-06 14:35:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 14:35:16,985 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 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 133 [2022-04-06 14:35:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:16,986 INFO L225 Difference]: With dead ends: 425 [2022-04-06 14:35:16,986 INFO L226 Difference]: Without dead ends: 408 [2022-04-06 14:35:16,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 14:35:16,987 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1328 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1328 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:16,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1328 Valid, 37 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:35:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-04-06 14:35:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 136. [2022-04-06 14:35:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 3 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) [2022-04-06 14:35:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2022-04-06 14:35:17,069 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2022-04-06 14:35:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:17,069 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2022-04-06 14:35:17,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 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) [2022-04-06 14:35:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2022-04-06 14:35:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 14:35:17,070 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:17,070 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:17,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 14:35:17,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 14:35:17,270 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:17,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:17,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1590280243, now seen corresponding path program 113 times [2022-04-06 14:35:17,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:17,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [115409163] [2022-04-06 14:35:17,272 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:17,272 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:17,272 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:17,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1590280243, now seen corresponding path program 114 times [2022-04-06 14:35:17,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:17,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338366783] [2022-04-06 14:35:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:17,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:18,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:18,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338366783] [2022-04-06 14:35:18,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338366783] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:18,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967711129] [2022-04-06 14:35:18,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:35:18,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:18,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:18,244 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:35:18,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 14:35:18,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:35:18,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:18,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:35:18,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-04-06 14:35:18,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-04-06 14:35:18,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967711129] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:35:18,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:35:18,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 66 [2022-04-06 14:35:18,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:18,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [115409163] [2022-04-06 14:35:18,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [115409163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:18,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:18,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 14:35:18,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673622648] [2022-04-06 14:35:18,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:18,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 14:35:18,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 14:35:18,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1959, Invalid=2331, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 14:35:18,918 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 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) [2022-04-06 14:35:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:24,149 INFO L93 Difference]: Finished difference Result 432 states and 550 transitions. [2022-04-06 14:35:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 14:35:24,150 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 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 135 [2022-04-06 14:35:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:24,151 INFO L225 Difference]: With dead ends: 432 [2022-04-06 14:35:24,151 INFO L226 Difference]: Without dead ends: 415 [2022-04-06 14:35:24,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1997 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5551, Invalid=9455, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 14:35:24,152 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1252 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:24,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 47 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:35:24,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-04-06 14:35:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 138. [2022-04-06 14:35:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 3 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) [2022-04-06 14:35:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-04-06 14:35:24,236 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2022-04-06 14:35:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:24,236 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-04-06 14:35:24,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 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) [2022-04-06 14:35:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-04-06 14:35:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 14:35:24,237 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:24,237 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:24,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 14:35:24,437 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 14:35:24,437 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:24,438 INFO L85 PathProgramCache]: Analyzing trace with hash 134092779, now seen corresponding path program 115 times [2022-04-06 14:35:24,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:24,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1106729855] [2022-04-06 14:35:24,439 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:24,439 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:24,439 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash 134092779, now seen corresponding path program 116 times [2022-04-06 14:35:24,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:24,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118800507] [2022-04-06 14:35:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:24,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:25,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:25,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:25,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118800507] [2022-04-06 14:35:25,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118800507] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:25,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276616087] [2022-04-06 14:35:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:35:25,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:25,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:25,435 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:35:25,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 14:35:25,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:35:25,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:25,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 14:35:25,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:25,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:28,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276616087] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:35:28,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:35:28,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-04-06 14:35:28,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:28,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1106729855] [2022-04-06 14:35:28,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1106729855] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:28,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:28,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 14:35:28,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047895875] [2022-04-06 14:35:28,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:28,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 14:35:28,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 14:35:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 14:35:28,807 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 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) [2022-04-06 14:35:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:34,385 INFO L93 Difference]: Finished difference Result 439 states and 559 transitions. [2022-04-06 14:35:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 14:35:34,385 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 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 137 [2022-04-06 14:35:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:34,386 INFO L225 Difference]: With dead ends: 439 [2022-04-06 14:35:34,386 INFO L226 Difference]: Without dead ends: 422 [2022-04-06 14:35:34,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 14:35:34,388 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1574 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:34,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1574 Valid, 22 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:35:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-06 14:35:34,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 140. [2022-04-06 14:35:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 3 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) [2022-04-06 14:35:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-04-06 14:35:34,502 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2022-04-06 14:35:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:34,502 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-04-06 14:35:34,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 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) [2022-04-06 14:35:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-04-06 14:35:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 14:35:34,503 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:34,503 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:34,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 14:35:34,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:34,703 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:34,704 INFO L85 PathProgramCache]: Analyzing trace with hash -600809335, now seen corresponding path program 117 times [2022-04-06 14:35:34,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:34,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1232290194] [2022-04-06 14:35:34,705 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:34,705 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:34,705 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:34,705 INFO L85 PathProgramCache]: Analyzing trace with hash -600809335, now seen corresponding path program 118 times [2022-04-06 14:35:34,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:34,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954492420] [2022-04-06 14:35:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:34,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:35,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:35,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:35,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954492420] [2022-04-06 14:35:35,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954492420] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:35,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334225223] [2022-04-06 14:35:35,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:35:35,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:35,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:35,747 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:35:35,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 14:35:36,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:35:36,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 14:35:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:36,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:39,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334225223] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:35:39,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:35:39,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-04-06 14:35:39,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:39,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1232290194] [2022-04-06 14:35:39,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1232290194] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:39,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:39,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 14:35:39,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937911426] [2022-04-06 14:35:39,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:39,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 14:35:39,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:39,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 14:35:39,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 14:35:39,313 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 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) [2022-04-06 14:35:45,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:45,269 INFO L93 Difference]: Finished difference Result 446 states and 568 transitions. [2022-04-06 14:35:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 14:35:45,269 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 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 139 [2022-04-06 14:35:45,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:45,270 INFO L225 Difference]: With dead ends: 446 [2022-04-06 14:35:45,270 INFO L226 Difference]: Without dead ends: 429 [2022-04-06 14:35:45,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 14:35:45,271 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1403 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1403 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:45,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1403 Valid, 42 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:35:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-04-06 14:35:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 142. [2022-04-06 14:35:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 3 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) [2022-04-06 14:35:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2022-04-06 14:35:45,365 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2022-04-06 14:35:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:45,366 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2022-04-06 14:35:45,366 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 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) [2022-04-06 14:35:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2022-04-06 14:35:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 14:35:45,366 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:45,366 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:45,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-04-06 14:35:45,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:45,567 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:45,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1827862951, now seen corresponding path program 119 times [2022-04-06 14:35:45,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:45,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1429179207] [2022-04-06 14:35:45,568 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:45,568 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:45,568 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1827862951, now seen corresponding path program 120 times [2022-04-06 14:35:45,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:45,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584595477] [2022-04-06 14:35:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:45,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:46,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:46,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:46,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584595477] [2022-04-06 14:35:46,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584595477] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:46,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398649349] [2022-04-06 14:35:46,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:35:46,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:46,654 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:35:46,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 14:35:46,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:35:46,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:46,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:35:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-04-06 14:35:47,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-04-06 14:35:47,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398649349] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:35:47,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:35:47,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 7, 7] total 69 [2022-04-06 14:35:47,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:47,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1429179207] [2022-04-06 14:35:47,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1429179207] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:47,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:47,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 14:35:47,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254231288] [2022-04-06 14:35:47,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:47,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 14:35:47,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:47,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 14:35:47,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2151, Invalid=2541, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 14:35:47,354 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 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) [2022-04-06 14:35:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:53,452 INFO L93 Difference]: Finished difference Result 453 states and 577 transitions. [2022-04-06 14:35:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 14:35:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 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 141 [2022-04-06 14:35:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:53,453 INFO L225 Difference]: With dead ends: 453 [2022-04-06 14:35:53,453 INFO L226 Difference]: Without dead ends: 436 [2022-04-06 14:35:53,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6112, Invalid=10400, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 14:35:53,454 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1884 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1884 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:53,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1884 Valid, 37 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:35:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-04-06 14:35:53,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 144. [2022-04-06 14:35:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 3 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) [2022-04-06 14:35:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2022-04-06 14:35:53,556 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 141 [2022-04-06 14:35:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:53,556 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2022-04-06 14:35:53,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 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) [2022-04-06 14:35:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2022-04-06 14:35:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 14:35:53,557 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:53,557 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:53,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 14:35:53,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:53,758 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:53,759 INFO L85 PathProgramCache]: Analyzing trace with hash -680279227, now seen corresponding path program 121 times [2022-04-06 14:35:53,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:53,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1561485212] [2022-04-06 14:35:53,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:53,760 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:53,760 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:53,760 INFO L85 PathProgramCache]: Analyzing trace with hash -680279227, now seen corresponding path program 122 times [2022-04-06 14:35:53,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:53,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985213541] [2022-04-06 14:35:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:53,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:54,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:54,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:54,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985213541] [2022-04-06 14:35:54,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985213541] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:54,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330271694] [2022-04-06 14:35:54,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:35:54,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:54,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:54,859 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:35:54,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 14:35:55,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:35:55,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:55,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 14:35:55,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:55,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:35:58,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330271694] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:35:58,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:35:58,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-04-06 14:35:58,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:58,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1561485212] [2022-04-06 14:35:58,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1561485212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:58,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:58,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 14:35:58,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585259632] [2022-04-06 14:35:58,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:58,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 14:35:58,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:58,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 14:35:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 14:35:58,571 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 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) [2022-04-06 14:36:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:05,179 INFO L93 Difference]: Finished difference Result 460 states and 586 transitions. [2022-04-06 14:36:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 14:36:05,180 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 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 143 [2022-04-06 14:36:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:05,181 INFO L225 Difference]: With dead ends: 460 [2022-04-06 14:36:05,181 INFO L226 Difference]: Without dead ends: 443 [2022-04-06 14:36:05,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 14:36:05,182 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1379 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:05,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 52 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:36:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-04-06 14:36:05,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 146. [2022-04-06 14:36:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 141 states have internal predecessors, (146), 3 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) [2022-04-06 14:36:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2022-04-06 14:36:05,284 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 143 [2022-04-06 14:36:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:05,284 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2022-04-06 14:36:05,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 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) [2022-04-06 14:36:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2022-04-06 14:36:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 14:36:05,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:05,284 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:05,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:05,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:05,491 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:05,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:05,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1528259229, now seen corresponding path program 123 times [2022-04-06 14:36:05,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:05,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1915054321] [2022-04-06 14:36:05,492 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:36:05,492 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:36:05,492 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:36:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1528259229, now seen corresponding path program 124 times [2022-04-06 14:36:05,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:05,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948087399] [2022-04-06 14:36:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:05,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:06,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:36:06,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:06,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948087399] [2022-04-06 14:36:06,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948087399] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:06,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062910095] [2022-04-06 14:36:06,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:06,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:06,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:06,641 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:06,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 14:36:06,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:06,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 14:36:07,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:36:07,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:36:10,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062910095] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:10,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:10,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-04-06 14:36:10,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:10,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1915054321] [2022-04-06 14:36:10,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1915054321] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:10,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:10,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 14:36:10,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937243312] [2022-04-06 14:36:10,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:10,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 14:36:10,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:10,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 14:36:10,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 14:36:10,522 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 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) [2022-04-06 14:36:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:17,419 INFO L93 Difference]: Finished difference Result 467 states and 595 transitions. [2022-04-06 14:36:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 14:36:17,420 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 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 145 [2022-04-06 14:36:17,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:17,421 INFO L225 Difference]: With dead ends: 467 [2022-04-06 14:36:17,421 INFO L226 Difference]: Without dead ends: 450 [2022-04-06 14:36:17,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 14:36:17,422 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1882 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1882 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:17,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1882 Valid, 27 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:36:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-04-06 14:36:17,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 148. [2022-04-06 14:36:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.034965034965035) internal successors, (148), 143 states have internal predecessors, (148), 3 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) [2022-04-06 14:36:17,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2022-04-06 14:36:17,527 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2022-04-06 14:36:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:17,527 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2022-04-06 14:36:17,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 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) [2022-04-06 14:36:17,527 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2022-04-06 14:36:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 14:36:17,527 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:17,527 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:17,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:17,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 14:36:17,732 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash -393254911, now seen corresponding path program 125 times [2022-04-06 14:36:17,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:17,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [4528082] [2022-04-06 14:36:17,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:36:17,733 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:36:17,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:36:17,733 INFO L85 PathProgramCache]: Analyzing trace with hash -393254911, now seen corresponding path program 126 times [2022-04-06 14:36:17,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:17,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903323505] [2022-04-06 14:36:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:17,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:18,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:36:18,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:18,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903323505] [2022-04-06 14:36:18,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903323505] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:18,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239541571] [2022-04-06 14:36:18,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:18,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:18,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:18,903 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:18,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 14:36:19,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:36:19,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:19,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:36:19,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-04-06 14:36:19,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-04-06 14:36:19,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239541571] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:19,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:19,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 7, 7] total 72 [2022-04-06 14:36:19,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:19,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [4528082] [2022-04-06 14:36:19,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [4528082] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:19,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:19,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 14:36:19,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058586996] [2022-04-06 14:36:19,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:19,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 14:36:19,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:19,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 14:36:19,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=2760, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 14:36:19,646 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 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) [2022-04-06 14:36:26,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:26,800 INFO L93 Difference]: Finished difference Result 474 states and 604 transitions. [2022-04-06 14:36:26,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 14:36:26,800 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 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 147 [2022-04-06 14:36:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:26,801 INFO L225 Difference]: With dead ends: 474 [2022-04-06 14:36:26,801 INFO L226 Difference]: Without dead ends: 457 [2022-04-06 14:36:26,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6700, Invalid=11390, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 14:36:26,802 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1476 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:26,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 47 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:36:26,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-04-06 14:36:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 150. [2022-04-06 14:36:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 3 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) [2022-04-06 14:36:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2022-04-06 14:36:26,924 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 147 [2022-04-06 14:36:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:26,924 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2022-04-06 14:36:26,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 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) [2022-04-06 14:36:26,924 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2022-04-06 14:36:26,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 14:36:26,925 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:26,925 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:26,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:27,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:27,125 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:27,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:27,125 INFO L85 PathProgramCache]: Analyzing trace with hash -575798497, now seen corresponding path program 127 times [2022-04-06 14:36:27,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:27,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624260994] [2022-04-06 14:36:27,126 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:36:27,127 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:36:27,127 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:36:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash -575798497, now seen corresponding path program 128 times [2022-04-06 14:36:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:27,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808540056] [2022-04-06 14:36:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:27,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:28,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:36:28,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:28,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808540056] [2022-04-06 14:36:28,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808540056] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:28,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491841816] [2022-04-06 14:36:28,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:28,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:28,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:28,334 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:28,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 14:36:28,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:28,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:28,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 14:36:28,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:36:28,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:36:32,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491841816] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:32,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:32,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-04-06 14:36:32,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:32,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624260994] [2022-04-06 14:36:32,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624260994] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:32,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:32,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 14:36:32,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348514041] [2022-04-06 14:36:32,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:32,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 14:36:32,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:32,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 14:36:32,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 14:36:32,343 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 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) [2022-04-06 14:36:40,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:40,124 INFO L93 Difference]: Finished difference Result 481 states and 613 transitions. [2022-04-06 14:36:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 14:36:40,124 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 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 149 [2022-04-06 14:36:40,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:40,125 INFO L225 Difference]: With dead ends: 481 [2022-04-06 14:36:40,125 INFO L226 Difference]: Without dead ends: 464 [2022-04-06 14:36:40,127 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 14:36:40,127 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1568 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:40,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 52 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:36:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-04-06 14:36:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 152. [2022-04-06 14:36:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.034013605442177) internal successors, (152), 147 states have internal predecessors, (152), 3 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) [2022-04-06 14:36:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-04-06 14:36:40,244 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2022-04-06 14:36:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:40,244 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-04-06 14:36:40,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 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) [2022-04-06 14:36:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-04-06 14:36:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 14:36:40,245 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:40,245 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:40,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:40,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 14:36:40,452 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:40,453 INFO L85 PathProgramCache]: Analyzing trace with hash 93474493, now seen corresponding path program 129 times [2022-04-06 14:36:40,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:40,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1332026660] [2022-04-06 14:36:40,454 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:36:40,454 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:36:40,454 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:36:40,454 INFO L85 PathProgramCache]: Analyzing trace with hash 93474493, now seen corresponding path program 130 times [2022-04-06 14:36:40,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:40,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256906895] [2022-04-06 14:36:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:40,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:41,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:36:41,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:41,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256906895] [2022-04-06 14:36:41,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256906895] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:41,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736477182] [2022-04-06 14:36:41,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:41,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:41,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:41,713 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:41,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 14:36:42,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:42,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:42,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 14:36:42,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:36:42,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:36:45,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736477182] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:45,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:45,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-04-06 14:36:45,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:45,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1332026660] [2022-04-06 14:36:45,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1332026660] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:45,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:45,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 14:36:45,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727509467] [2022-04-06 14:36:45,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:45,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 14:36:45,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:45,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 14:36:45,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 14:36:45,947 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 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) [2022-04-06 14:36:54,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:54,063 INFO L93 Difference]: Finished difference Result 488 states and 622 transitions. [2022-04-06 14:36:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 14:36:54,064 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 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 151 [2022-04-06 14:36:54,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:54,065 INFO L225 Difference]: With dead ends: 488 [2022-04-06 14:36:54,065 INFO L226 Difference]: Without dead ends: 471 [2022-04-06 14:36:54,067 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 14:36:54,067 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1648 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:54,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1648 Valid, 42 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:36:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-04-06 14:36:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 154. [2022-04-06 14:36:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 149 states have internal predecessors, (154), 3 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) [2022-04-06 14:36:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2022-04-06 14:36:54,184 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2022-04-06 14:36:54,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:54,184 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2022-04-06 14:36:54,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 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) [2022-04-06 14:36:54,184 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2022-04-06 14:36:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 14:36:54,185 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:54,185 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:54,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:54,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 14:36:54,403 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:54,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash -980276517, now seen corresponding path program 131 times [2022-04-06 14:36:54,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:54,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1172253838] [2022-04-06 14:36:54,405 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:36:54,405 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:36:54,405 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:36:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash -980276517, now seen corresponding path program 132 times [2022-04-06 14:36:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:54,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717015102] [2022-04-06 14:36:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:54,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:55,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:36:55,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:55,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717015102] [2022-04-06 14:36:55,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717015102] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:55,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8863188] [2022-04-06 14:36:55,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:55,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:55,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:55,690 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:55,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 14:36:56,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:36:56,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:56,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:36:56,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-04-06 14:36:56,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-04-06 14:36:56,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8863188] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:56,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:56,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 7, 7] total 75 [2022-04-06 14:36:56,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:56,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1172253838] [2022-04-06 14:36:56,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1172253838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:56,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:56,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 14:36:56,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610355797] [2022-04-06 14:36:56,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:56,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 14:36:56,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:56,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 14:36:56,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2562, Invalid=2988, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 14:36:56,477 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 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) [2022-04-06 14:37:04,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:04,743 INFO L93 Difference]: Finished difference Result 495 states and 631 transitions. [2022-04-06 14:37:04,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 14:37:04,744 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 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 153 [2022-04-06 14:37:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:04,745 INFO L225 Difference]: With dead ends: 495 [2022-04-06 14:37:04,745 INFO L226 Difference]: Without dead ends: 478 [2022-04-06 14:37:04,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7315, Invalid=12425, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 14:37:04,746 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1462 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:04,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 57 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:37:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-04-06 14:37:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 156. [2022-04-06 14:37:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 3 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) [2022-04-06 14:37:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-04-06 14:37:04,875 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 153 [2022-04-06 14:37:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:04,875 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-04-06 14:37:04,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 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) [2022-04-06 14:37:04,875 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-04-06 14:37:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 14:37:04,875 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:04,876 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:04,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 14:37:05,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 14:37:05,076 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2062846087, now seen corresponding path program 133 times [2022-04-06 14:37:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:05,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [750834090] [2022-04-06 14:37:05,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:37:05,077 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:37:05,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:37:05,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2062846087, now seen corresponding path program 134 times [2022-04-06 14:37:05,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:05,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585182762] [2022-04-06 14:37:05,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:05,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:06,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:37:06,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:06,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585182762] [2022-04-06 14:37:06,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585182762] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:06,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889647406] [2022-04-06 14:37:06,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:37:06,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:06,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:06,416 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:06,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 14:37:06,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:37:06,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:06,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 14:37:06,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:37:07,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:37:10,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889647406] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:10,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:10,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-04-06 14:37:10,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:10,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [750834090] [2022-04-06 14:37:10,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [750834090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:10,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:10,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 14:37:10,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009767555] [2022-04-06 14:37:10,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:10,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 14:37:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:10,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 14:37:10,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 14:37:10,848 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 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) [2022-04-06 14:37:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:19,338 INFO L93 Difference]: Finished difference Result 502 states and 640 transitions. [2022-04-06 14:37:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 14:37:19,339 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 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 155 [2022-04-06 14:37:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:19,340 INFO L225 Difference]: With dead ends: 502 [2022-04-06 14:37:19,340 INFO L226 Difference]: Without dead ends: 485 [2022-04-06 14:37:19,341 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 14:37:19,342 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1610 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:19,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 42 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:37:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-04-06 14:37:19,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 158. [2022-04-06 14:37:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 3 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) [2022-04-06 14:37:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2022-04-06 14:37:19,484 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 155 [2022-04-06 14:37:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:19,484 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2022-04-06 14:37:19,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 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) [2022-04-06 14:37:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2022-04-06 14:37:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 14:37:19,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:19,485 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:19,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-04-06 14:37:19,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 14:37:19,686 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:19,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:19,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1264850071, now seen corresponding path program 135 times [2022-04-06 14:37:19,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:19,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1997165234] [2022-04-06 14:37:19,687 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:37:19,687 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:37:19,687 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:37:19,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1264850071, now seen corresponding path program 136 times [2022-04-06 14:37:19,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:19,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020529081] [2022-04-06 14:37:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:19,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:21,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:37:21,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:21,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020529081] [2022-04-06 14:37:21,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020529081] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:21,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816819455] [2022-04-06 14:37:21,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:37:21,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:21,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:21,090 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:21,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 14:37:21,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:37:21,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:21,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 14:37:21,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:37:21,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:37:25,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816819455] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:25,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:25,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-04-06 14:37:25,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:25,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1997165234] [2022-04-06 14:37:25,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1997165234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:25,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:25,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 14:37:25,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925898494] [2022-04-06 14:37:25,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:25,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 14:37:25,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:25,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 14:37:25,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 14:37:25,639 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 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) [2022-04-06 14:37:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:34,765 INFO L93 Difference]: Finished difference Result 509 states and 649 transitions. [2022-04-06 14:37:34,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 14:37:34,765 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 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 157 [2022-04-06 14:37:34,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:34,767 INFO L225 Difference]: With dead ends: 509 [2022-04-06 14:37:34,767 INFO L226 Difference]: Without dead ends: 492 [2022-04-06 14:37:34,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:37:34,768 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1556 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1556 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:34,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1556 Valid, 47 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:37:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-04-06 14:37:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 160. [2022-04-06 14:37:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.032258064516129) internal successors, (160), 155 states have internal predecessors, (160), 3 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) [2022-04-06 14:37:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2022-04-06 14:37:34,899 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 157 [2022-04-06 14:37:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:34,899 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2022-04-06 14:37:34,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 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) [2022-04-06 14:37:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2022-04-06 14:37:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 14:37:34,900 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:34,900 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:34,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 14:37:35,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:35,100 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:35,101 INFO L85 PathProgramCache]: Analyzing trace with hash -569777611, now seen corresponding path program 137 times [2022-04-06 14:37:35,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:35,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1528027116] [2022-04-06 14:37:35,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:37:35,102 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:37:35,102 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:37:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash -569777611, now seen corresponding path program 138 times [2022-04-06 14:37:35,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:35,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620461367] [2022-04-06 14:37:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:35,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:36,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:37:36,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:36,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620461367] [2022-04-06 14:37:36,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620461367] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:36,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147300094] [2022-04-06 14:37:36,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:37:36,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:36,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:36,498 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:36,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 14:37:36,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:37:36,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:36,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:37:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-04-06 14:37:37,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-04-06 14:37:37,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147300094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:37,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:37,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 7, 7] total 78 [2022-04-06 14:37:37,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1528027116] [2022-04-06 14:37:37,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1528027116] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:37,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:37,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 14:37:37,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142383596] [2022-04-06 14:37:37,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:37,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 14:37:37,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 14:37:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2781, Invalid=3225, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 14:37:37,355 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 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) [2022-04-06 14:37:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:46,645 INFO L93 Difference]: Finished difference Result 516 states and 658 transitions. [2022-04-06 14:37:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 14:37:46,646 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 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 159 [2022-04-06 14:37:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:46,647 INFO L225 Difference]: With dead ends: 516 [2022-04-06 14:37:46,647 INFO L226 Difference]: Without dead ends: 499 [2022-04-06 14:37:46,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7957, Invalid=13505, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 14:37:46,648 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2136 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:46,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2136 Valid, 32 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:37:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-04-06 14:37:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 162. [2022-04-06 14:37:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 3 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) [2022-04-06 14:37:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2022-04-06 14:37:46,783 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2022-04-06 14:37:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:46,783 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2022-04-06 14:37:46,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 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) [2022-04-06 14:37:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2022-04-06 14:37:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 14:37:46,784 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:46,784 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:46,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:46,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:46,995 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:46,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:46,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1584578643, now seen corresponding path program 139 times [2022-04-06 14:37:46,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:46,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1662002145] [2022-04-06 14:37:46,997 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:37:46,997 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:37:46,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:37:46,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1584578643, now seen corresponding path program 140 times [2022-04-06 14:37:46,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:46,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540910312] [2022-04-06 14:37:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:46,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:48,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:37:48,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:48,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540910312] [2022-04-06 14:37:48,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540910312] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:48,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898431193] [2022-04-06 14:37:48,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:37:48,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:48,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:48,428 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:48,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 14:37:48,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:37:48,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:48,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 14:37:48,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:37:49,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:37:53,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898431193] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:53,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:53,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-04-06 14:37:53,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:53,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1662002145] [2022-04-06 14:37:53,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1662002145] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:53,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:53,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 14:37:53,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697673580] [2022-04-06 14:37:53,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:53,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 14:37:53,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 14:37:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 14:37:53,191 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 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) [2022-04-06 14:38:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:03,319 INFO L93 Difference]: Finished difference Result 523 states and 667 transitions. [2022-04-06 14:38:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 14:38:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 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 161 [2022-04-06 14:38:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:03,321 INFO L225 Difference]: With dead ends: 523 [2022-04-06 14:38:03,321 INFO L226 Difference]: Without dead ends: 506 [2022-04-06 14:38:03,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 14:38:03,323 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1645 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:03,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1645 Valid, 37 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:38:03,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-04-06 14:38:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 164. [2022-04-06 14:38:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 159 states have internal predecessors, (164), 3 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) [2022-04-06 14:38:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2022-04-06 14:38:03,460 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2022-04-06 14:38:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:03,460 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2022-04-06 14:38:03,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 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) [2022-04-06 14:38:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2022-04-06 14:38:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 14:38:03,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:03,460 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:03,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-06 14:38:03,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:03,661 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:03,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1746702065, now seen corresponding path program 141 times [2022-04-06 14:38:03,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:03,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [647646863] [2022-04-06 14:38:03,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:38:03,662 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:38:03,662 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:38:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1746702065, now seen corresponding path program 142 times [2022-04-06 14:38:03,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:03,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185274713] [2022-04-06 14:38:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:03,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:05,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:38:05,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185274713] [2022-04-06 14:38:05,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185274713] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93389166] [2022-04-06 14:38:05,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:38:05,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:05,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:05,124 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:05,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 14:38:05,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:38:05,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:05,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 14:38:05,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:38:05,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:38:10,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93389166] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:10,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:10,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-04-06 14:38:10,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:10,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [647646863] [2022-04-06 14:38:10,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [647646863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:10,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:10,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 14:38:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903520633] [2022-04-06 14:38:10,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:10,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 14:38:10,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 14:38:10,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 14:38:10,022 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 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) [2022-04-06 14:38:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:20,503 INFO L93 Difference]: Finished difference Result 530 states and 676 transitions. [2022-04-06 14:38:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 14:38:20,504 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 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 163 [2022-04-06 14:38:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:20,505 INFO L225 Difference]: With dead ends: 530 [2022-04-06 14:38:20,505 INFO L226 Difference]: Without dead ends: 513 [2022-04-06 14:38:20,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 14:38:20,507 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2006 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2006 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:20,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 37 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:38:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-04-06 14:38:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 166. [2022-04-06 14:38:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.031055900621118) internal successors, (166), 161 states have internal predecessors, (166), 3 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) [2022-04-06 14:38:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2022-04-06 14:38:20,656 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 163 [2022-04-06 14:38:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:20,656 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2022-04-06 14:38:20,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 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) [2022-04-06 14:38:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2022-04-06 14:38:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 14:38:20,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:20,657 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:20,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-04-06 14:38:20,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 14:38:20,876 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:20,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1366479345, now seen corresponding path program 143 times [2022-04-06 14:38:20,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:20,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2081164000] [2022-04-06 14:38:20,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:38:20,877 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:38:20,877 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:38:20,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1366479345, now seen corresponding path program 144 times [2022-04-06 14:38:20,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:20,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25634720] [2022-04-06 14:38:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:20,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:22,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:38:22,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:22,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25634720] [2022-04-06 14:38:22,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25634720] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:22,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085363555] [2022-04-06 14:38:22,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:38:22,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:22,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:22,398 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:22,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 14:38:22,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:38:22,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:22,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:38:22,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-04-06 14:38:23,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-04-06 14:38:23,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085363555] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:23,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:23,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 7, 7] total 81 [2022-04-06 14:38:23,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:23,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2081164000] [2022-04-06 14:38:23,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2081164000] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:23,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:23,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 14:38:23,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747147265] [2022-04-06 14:38:23,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:23,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 14:38:23,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:23,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 14:38:23,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3009, Invalid=3471, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 14:38:23,283 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 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) [2022-04-06 14:38:33,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:33,924 INFO L93 Difference]: Finished difference Result 537 states and 685 transitions. [2022-04-06 14:38:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 14:38:33,924 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 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 165 [2022-04-06 14:38:33,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:33,926 INFO L225 Difference]: With dead ends: 537 [2022-04-06 14:38:33,926 INFO L226 Difference]: Without dead ends: 520 [2022-04-06 14:38:33,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8626, Invalid=14630, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 14:38:33,927 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2185 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:33,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 22 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:38:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-04-06 14:38:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 168. [2022-04-06 14:38:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.030674846625767) internal successors, (168), 163 states have internal predecessors, (168), 3 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) [2022-04-06 14:38:34,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2022-04-06 14:38:34,081 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 165 [2022-04-06 14:38:34,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:34,081 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2022-04-06 14:38:34,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 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) [2022-04-06 14:38:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2022-04-06 14:38:34,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 14:38:34,082 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:34,082 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:34,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:34,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:34,291 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash 458390957, now seen corresponding path program 145 times [2022-04-06 14:38:34,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:34,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1437455559] [2022-04-06 14:38:34,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:38:34,293 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:38:34,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:38:34,293 INFO L85 PathProgramCache]: Analyzing trace with hash 458390957, now seen corresponding path program 146 times [2022-04-06 14:38:34,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:34,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006117942] [2022-04-06 14:38:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:35,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:38:35,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:35,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006117942] [2022-04-06 14:38:35,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006117942] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:35,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52896461] [2022-04-06 14:38:35,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:38:35,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:35,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:35,843 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:35,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 14:38:36,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:38:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 14:38:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:38:36,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:38:41,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52896461] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:41,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:41,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-04-06 14:38:41,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:41,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1437455559] [2022-04-06 14:38:41,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1437455559] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:41,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:41,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 14:38:41,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796109909] [2022-04-06 14:38:41,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:41,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 14:38:41,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:41,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 14:38:41,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-04-06 14:38:41,045 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 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) [2022-04-06 14:38:52,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:52,501 INFO L93 Difference]: Finished difference Result 544 states and 694 transitions. [2022-04-06 14:38:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 14:38:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 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 167 [2022-04-06 14:38:52,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:52,503 INFO L225 Difference]: With dead ends: 544 [2022-04-06 14:38:52,503 INFO L226 Difference]: Without dead ends: 527 [2022-04-06 14:38:52,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 14:38:52,505 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1875 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1875 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:52,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1875 Valid, 47 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:38:52,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-04-06 14:38:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 170. [2022-04-06 14:38:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 165 states have internal predecessors, (170), 3 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) [2022-04-06 14:38:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2022-04-06 14:38:52,655 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 167 [2022-04-06 14:38:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:52,655 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2022-04-06 14:38:52,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 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) [2022-04-06 14:38:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2022-04-06 14:38:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 14:38:52,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:52,656 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:52,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:52,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:52,859 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:52,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:52,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1812094411, now seen corresponding path program 147 times [2022-04-06 14:38:52,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:52,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1275844615] [2022-04-06 14:38:52,861 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:38:52,861 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:38:52,861 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:38:52,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1812094411, now seen corresponding path program 148 times [2022-04-06 14:38:52,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:52,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183199405] [2022-04-06 14:38:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:52,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:54,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:38:54,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:54,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183199405] [2022-04-06 14:38:54,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183199405] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:54,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722156078] [2022-04-06 14:38:54,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:38:54,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:54,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:54,447 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:54,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 14:38:54,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:38:54,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:54,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 14:38:54,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:38:55,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:38:59,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722156078] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:59,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:59,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-04-06 14:38:59,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:59,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1275844615] [2022-04-06 14:38:59,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1275844615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:59,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:59,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 14:38:59,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611937659] [2022-04-06 14:38:59,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:59,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 14:38:59,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:59,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 14:38:59,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 14:38:59,673 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 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) [2022-04-06 14:39:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:11,595 INFO L93 Difference]: Finished difference Result 551 states and 703 transitions. [2022-04-06 14:39:11,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 14:39:11,595 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 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 169 [2022-04-06 14:39:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:11,596 INFO L225 Difference]: With dead ends: 551 [2022-04-06 14:39:11,596 INFO L226 Difference]: Without dead ends: 534 [2022-04-06 14:39:11,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-04-06 14:39:11,598 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1850 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:11,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1850 Valid, 42 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:39:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-04-06 14:39:11,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 172. [2022-04-06 14:39:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.029940119760479) internal successors, (172), 167 states have internal predecessors, (172), 3 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) [2022-04-06 14:39:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2022-04-06 14:39:11,756 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 169 [2022-04-06 14:39:11,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:11,756 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2022-04-06 14:39:11,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 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) [2022-04-06 14:39:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2022-04-06 14:39:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 14:39:11,757 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:11,757 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:11,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 14:39:11,969 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 14:39:11,969 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:11,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1346023017, now seen corresponding path program 149 times [2022-04-06 14:39:11,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:11,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1396611330] [2022-04-06 14:39:11,970 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:39:11,970 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:39:11,970 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:39:11,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1346023017, now seen corresponding path program 150 times [2022-04-06 14:39:11,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:11,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686663757] [2022-04-06 14:39:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:11,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:13,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:39:13,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:13,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686663757] [2022-04-06 14:39:13,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686663757] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:13,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498439459] [2022-04-06 14:39:13,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:39:13,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:13,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:13,593 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:13,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 14:39:14,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:39:14,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:14,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:39:14,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-04-06 14:39:14,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-04-06 14:39:14,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498439459] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:14,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:14,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 7, 7] total 84 [2022-04-06 14:39:14,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:14,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1396611330] [2022-04-06 14:39:14,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1396611330] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:14,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:14,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 14:39:14,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371087344] [2022-04-06 14:39:14,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:14,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 14:39:14,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:14,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 14:39:14,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3246, Invalid=3726, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 14:39:14,541 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 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) [2022-04-06 14:39:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:26,680 INFO L93 Difference]: Finished difference Result 558 states and 712 transitions. [2022-04-06 14:39:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 14:39:26,680 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 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 171 [2022-04-06 14:39:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:26,682 INFO L225 Difference]: With dead ends: 558 [2022-04-06 14:39:26,682 INFO L226 Difference]: Without dead ends: 541 [2022-04-06 14:39:26,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9322, Invalid=15800, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 14:39:26,683 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2334 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2334 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:26,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2334 Valid, 42 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:39:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-04-06 14:39:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 174. [2022-04-06 14:39:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 3 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) [2022-04-06 14:39:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2022-04-06 14:39:26,843 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 171 [2022-04-06 14:39:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:26,843 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2022-04-06 14:39:26,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 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) [2022-04-06 14:39:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2022-04-06 14:39:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 14:39:26,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:26,844 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:26,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 14:39:27,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 14:39:27,044 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash 128012167, now seen corresponding path program 151 times [2022-04-06 14:39:27,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:27,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [998406867] [2022-04-06 14:39:27,045 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:39:27,045 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:39:27,046 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:39:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash 128012167, now seen corresponding path program 152 times [2022-04-06 14:39:27,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:27,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604640664] [2022-04-06 14:39:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:27,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:28,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:39:28,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:28,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604640664] [2022-04-06 14:39:28,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604640664] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:28,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250072768] [2022-04-06 14:39:28,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:39:28,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:28,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:28,716 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:28,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 14:39:29,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:39:29,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:29,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 14:39:29,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:39:29,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:39:34,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250072768] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:34,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:34,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-04-06 14:39:34,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:34,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [998406867] [2022-04-06 14:39:34,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [998406867] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:34,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:34,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 14:39:34,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685914521] [2022-04-06 14:39:34,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:34,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 14:39:34,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:34,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 14:39:34,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-04-06 14:39:34,290 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 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) [2022-04-06 14:39:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:47,430 INFO L93 Difference]: Finished difference Result 565 states and 721 transitions. [2022-04-06 14:39:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 14:39:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 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 173 [2022-04-06 14:39:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:47,432 INFO L225 Difference]: With dead ends: 565 [2022-04-06 14:39:47,432 INFO L226 Difference]: Without dead ends: 548 [2022-04-06 14:39:47,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 14:39:47,434 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2252 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2252 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:47,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2252 Valid, 47 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:39:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-04-06 14:39:47,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 176. [2022-04-06 14:39:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0292397660818713) internal successors, (176), 171 states have internal predecessors, (176), 3 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) [2022-04-06 14:39:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2022-04-06 14:39:47,604 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 173 [2022-04-06 14:39:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:47,605 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2022-04-06 14:39:47,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 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) [2022-04-06 14:39:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2022-04-06 14:39:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 14:39:47,605 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:47,605 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:47,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 14:39:47,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:47,818 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:47,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2145657125, now seen corresponding path program 153 times [2022-04-06 14:39:47,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:47,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1068305250] [2022-04-06 14:39:47,819 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:39:47,819 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:39:47,819 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:39:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2145657125, now seen corresponding path program 154 times [2022-04-06 14:39:47,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:47,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381606040] [2022-04-06 14:39:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:47,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:49,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:39:49,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:49,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381606040] [2022-04-06 14:39:49,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381606040] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:49,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634951349] [2022-04-06 14:39:49,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:39:49,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:49,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:49,594 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:49,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 14:39:50,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:39:50,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:50,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 14:39:50,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:39:50,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:39:55,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634951349] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:55,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:55,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-04-06 14:39:55,257 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:55,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1068305250] [2022-04-06 14:39:55,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1068305250] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:55,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:55,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 14:39:55,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276859244] [2022-04-06 14:39:55,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:55,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 14:39:55,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:55,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 14:39:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 14:39:55,262 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 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) [2022-04-06 14:40:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:08,926 INFO L93 Difference]: Finished difference Result 572 states and 730 transitions. [2022-04-06 14:40:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 14:40:08,926 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 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 175 [2022-04-06 14:40:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:08,927 INFO L225 Difference]: With dead ends: 572 [2022-04-06 14:40:08,927 INFO L226 Difference]: Without dead ends: 555 [2022-04-06 14:40:08,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 14:40:08,929 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2119 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:08,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 32 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:40:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-04-06 14:40:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 178. [2022-04-06 14:40:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 173 states have internal predecessors, (178), 3 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) [2022-04-06 14:40:09,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2022-04-06 14:40:09,106 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 175 [2022-04-06 14:40:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:09,106 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2022-04-06 14:40:09,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 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) [2022-04-06 14:40:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2022-04-06 14:40:09,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 14:40:09,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:09,107 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:09,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 14:40:09,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:09,307 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:09,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:09,308 INFO L85 PathProgramCache]: Analyzing trace with hash -222756029, now seen corresponding path program 155 times [2022-04-06 14:40:09,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:09,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1902598290] [2022-04-06 14:40:09,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:40:09,309 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:40:09,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:40:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash -222756029, now seen corresponding path program 156 times [2022-04-06 14:40:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:09,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027039882] [2022-04-06 14:40:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:11,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:40:11,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:11,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027039882] [2022-04-06 14:40:11,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027039882] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:11,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448629175] [2022-04-06 14:40:11,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:40:11,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:11,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:11,053 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:40:11,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 14:40:11,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:40:11,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:11,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:40:11,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-04-06 14:40:11,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-04-06 14:40:12,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448629175] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:40:12,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:40:12,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 7, 7] total 87 [2022-04-06 14:40:12,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:12,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1902598290] [2022-04-06 14:40:12,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1902598290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:12,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:12,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 14:40:12,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799799164] [2022-04-06 14:40:12,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:12,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 14:40:12,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:12,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 14:40:12,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3492, Invalid=3990, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 14:40:12,032 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 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) [2022-04-06 14:40:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:26,076 INFO L93 Difference]: Finished difference Result 579 states and 739 transitions. [2022-04-06 14:40:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 14:40:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 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 177 [2022-04-06 14:40:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:26,078 INFO L225 Difference]: With dead ends: 579 [2022-04-06 14:40:26,078 INFO L226 Difference]: Without dead ends: 562 [2022-04-06 14:40:26,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10045, Invalid=17015, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 14:40:26,079 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2201 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2201 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:26,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2201 Valid, 42 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:40:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-04-06 14:40:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 180. [2022-04-06 14:40:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 175 states have internal predecessors, (180), 3 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) [2022-04-06 14:40:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2022-04-06 14:40:26,264 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 177 [2022-04-06 14:40:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:26,265 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2022-04-06 14:40:26,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 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) [2022-04-06 14:40:26,265 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2022-04-06 14:40:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 14:40:26,265 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:26,265 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:26,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-04-06 14:40:26,466 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:26,466 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:26,466 INFO L85 PathProgramCache]: Analyzing trace with hash 64869857, now seen corresponding path program 157 times [2022-04-06 14:40:26,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:26,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [923442041] [2022-04-06 14:40:26,467 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:40:26,467 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:40:26,467 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:40:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash 64869857, now seen corresponding path program 158 times [2022-04-06 14:40:26,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:26,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891127584] [2022-04-06 14:40:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:26,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:28,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:40:28,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:28,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891127584] [2022-04-06 14:40:28,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891127584] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:28,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19331963] [2022-04-06 14:40:28,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:40:28,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:28,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:28,257 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:40:28,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 14:40:28,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:40:28,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:28,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 14:40:28,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:40:29,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:40:34,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19331963] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:40:34,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:40:34,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-04-06 14:40:34,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:34,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [923442041] [2022-04-06 14:40:34,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [923442041] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:34,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:34,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 14:40:34,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375989772] [2022-04-06 14:40:34,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:34,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 14:40:34,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:34,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 14:40:34,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 14:40:34,256 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 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) [2022-04-06 14:40:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:49,270 INFO L93 Difference]: Finished difference Result 586 states and 748 transitions. [2022-04-06 14:40:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 14:40:49,270 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 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 179 [2022-04-06 14:40:49,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:49,272 INFO L225 Difference]: With dead ends: 586 [2022-04-06 14:40:49,272 INFO L226 Difference]: Without dead ends: 569 [2022-04-06 14:40:49,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-04-06 14:40:49,274 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1828 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1828 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:49,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1828 Valid, 52 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:40:49,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-04-06 14:40:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 182. [2022-04-06 14:40:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 3 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) [2022-04-06 14:40:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2022-04-06 14:40:49,463 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 179 [2022-04-06 14:40:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:49,463 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2022-04-06 14:40:49,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 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) [2022-04-06 14:40:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2022-04-06 14:40:49,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 14:40:49,464 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:49,464 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:49,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 14:40:49,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:49,665 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:49,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1595439359, now seen corresponding path program 159 times [2022-04-06 14:40:49,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:49,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1681183911] [2022-04-06 14:40:49,666 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:40:49,667 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:40:49,667 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:40:49,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1595439359, now seen corresponding path program 160 times [2022-04-06 14:40:49,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:49,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6708467] [2022-04-06 14:40:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:49,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:51,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:40:51,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:51,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6708467] [2022-04-06 14:40:51,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6708467] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:51,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298192685] [2022-04-06 14:40:51,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:40:51,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:51,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:51,488 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:40:51,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 14:40:52,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:40:52,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:52,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 14:40:52,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:40:52,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:40:57,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298192685] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:40:57,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:40:57,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-04-06 14:40:57,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:57,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1681183911] [2022-04-06 14:40:57,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1681183911] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:57,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:57,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 14:40:57,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675353179] [2022-04-06 14:40:57,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:57,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 14:40:57,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:57,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 14:40:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 14:40:57,563 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 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) [2022-04-06 14:41:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:41:13,125 INFO L93 Difference]: Finished difference Result 593 states and 757 transitions. [2022-04-06 14:41:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 14:41:13,126 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 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 181 [2022-04-06 14:41:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:41:13,127 INFO L225 Difference]: With dead ends: 593 [2022-04-06 14:41:13,127 INFO L226 Difference]: Without dead ends: 576 [2022-04-06 14:41:13,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-04-06 14:41:13,129 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2225 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2225 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:41:13,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2225 Valid, 32 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:41:13,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-04-06 14:41:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 184. [2022-04-06 14:41:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 3 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) [2022-04-06 14:41:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2022-04-06 14:41:13,321 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2022-04-06 14:41:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:41:13,322 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2022-04-06 14:41:13,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 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) [2022-04-06 14:41:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2022-04-06 14:41:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 14:41:13,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:41:13,322 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:41:13,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-06 14:41:13,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:13,523 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:41:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:41:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash -701051747, now seen corresponding path program 161 times [2022-04-06 14:41:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:13,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1371065422] [2022-04-06 14:41:13,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:41:13,524 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:41:13,524 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:41:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash -701051747, now seen corresponding path program 162 times [2022-04-06 14:41:13,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:41:13,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943350227] [2022-04-06 14:41:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:41:13,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:41:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:15,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:41:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:41:15,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:41:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943350227] [2022-04-06 14:41:15,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943350227] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408253292] [2022-04-06 14:41:15,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:41:15,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:41:15,390 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:41:15,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 14:41:15,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:41:15,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:41:15,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:41:15,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:41:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-04-06 14:41:16,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:41:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-04-06 14:41:16,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408253292] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:41:16,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:41:16,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 7, 7] total 90 [2022-04-06 14:41:16,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:41:16,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1371065422] [2022-04-06 14:41:16,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1371065422] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:41:16,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:41:16,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 14:41:16,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385368898] [2022-04-06 14:41:16,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:41:16,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 14:41:16,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:16,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 14:41:16,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3747, Invalid=4263, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 14:41:16,414 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 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) [2022-04-06 14:41:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:41:32,003 INFO L93 Difference]: Finished difference Result 600 states and 766 transitions. [2022-04-06 14:41:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 14:41:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 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 183 [2022-04-06 14:41:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:41:32,005 INFO L225 Difference]: With dead ends: 600 [2022-04-06 14:41:32,005 INFO L226 Difference]: Without dead ends: 583 [2022-04-06 14:41:32,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 361 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3809 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10795, Invalid=18275, Unknown=0, NotChecked=0, Total=29070 [2022-04-06 14:41:32,006 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2066 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2066 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:41:32,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2066 Valid, 57 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:41:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-04-06 14:41:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 186. [2022-04-06 14:41:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0276243093922652) internal successors, (186), 181 states have internal predecessors, (186), 3 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) [2022-04-06 14:41:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2022-04-06 14:41:32,206 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2022-04-06 14:41:32,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:41:32,206 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2022-04-06 14:41:32,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 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) [2022-04-06 14:41:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2022-04-06 14:41:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 14:41:32,207 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:41:32,207 INFO L499 BasicCegarLoop]: trace histogram [81, 81, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:41:32,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-06 14:41:32,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-06 14:41:32,408 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:41:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:41:32,408 INFO L85 PathProgramCache]: Analyzing trace with hash -15814469, now seen corresponding path program 163 times [2022-04-06 14:41:32,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:32,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [691601615] [2022-04-06 14:41:32,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:41:32,409 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:41:32,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:41:32,409 INFO L85 PathProgramCache]: Analyzing trace with hash -15814469, now seen corresponding path program 164 times [2022-04-06 14:41:32,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:41:32,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461143588] [2022-04-06 14:41:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:41:32,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:41:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:34,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:41:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:41:34,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:41:34,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461143588] [2022-04-06 14:41:34,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461143588] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:34,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254057675] [2022-04-06 14:41:34,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:41:34,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:34,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:41:34,311 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:41:34,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 14:41:34,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:41:34,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:41:34,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 14:41:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:41:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:41:35,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:41:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:41:40,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254057675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:41:40,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:41:40,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-04-06 14:41:40,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:41:40,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [691601615] [2022-04-06 14:41:40,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [691601615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:41:40,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:41:40,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 14:41:40,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855378389] [2022-04-06 14:41:40,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:41:40,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 14:41:40,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:40,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 14:41:40,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 14:41:40,662 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 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) [2022-04-06 14:41:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:41:57,471 INFO L93 Difference]: Finished difference Result 607 states and 775 transitions. [2022-04-06 14:41:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 14:41:57,472 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 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 185 [2022-04-06 14:41:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:41:57,473 INFO L225 Difference]: With dead ends: 607 [2022-04-06 14:41:57,473 INFO L226 Difference]: Without dead ends: 590 [2022-04-06 14:41:57,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-04-06 14:41:57,475 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1958 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:41:57,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1958 Valid, 42 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:41:57,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-04-06 14:41:57,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 188. [2022-04-06 14:41:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0273224043715847) internal successors, (188), 183 states have internal predecessors, (188), 3 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) [2022-04-06 14:41:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2022-04-06 14:41:57,680 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 185 [2022-04-06 14:41:57,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:41:57,680 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2022-04-06 14:41:57,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 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) [2022-04-06 14:41:57,680 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2022-04-06 14:41:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 14:41:57,681 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:41:57,681 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:41:57,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 14:41:57,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:57,891 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:41:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:41:57,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1367213401, now seen corresponding path program 165 times [2022-04-06 14:41:57,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:57,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1993090061] [2022-04-06 14:41:57,893 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:41:57,893 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:41:57,893 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:41:57,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1367213401, now seen corresponding path program 166 times [2022-04-06 14:41:57,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:41:57,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318259249] [2022-04-06 14:41:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:41:57,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:41:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:59,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:41:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:41:59,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:41:59,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318259249] [2022-04-06 14:41:59,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318259249] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:59,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718469901] [2022-04-06 14:41:59,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:41:59,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:59,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:41:59,854 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:41:59,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 14:42:00,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:42:00,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:42:00,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 14:42:00,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:42:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:42:00,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:42:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:42:06,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718469901] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:42:06,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:42:06,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-04-06 14:42:06,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:42:06,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1993090061] [2022-04-06 14:42:06,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1993090061] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:42:06,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:42:06,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 14:42:06,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728521208] [2022-04-06 14:42:06,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:42:06,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 14:42:06,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:06,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 14:42:06,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 14:42:06,303 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 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) [2022-04-06 14:42:23,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:42:23,950 INFO L93 Difference]: Finished difference Result 614 states and 784 transitions. [2022-04-06 14:42:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 14:42:23,950 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 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 187 [2022-04-06 14:42:23,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:42:23,952 INFO L225 Difference]: With dead ends: 614 [2022-04-06 14:42:23,952 INFO L226 Difference]: Without dead ends: 597 [2022-04-06 14:42:23,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-04-06 14:42:23,954 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2192 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2192 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:42:23,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2192 Valid, 42 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [573 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:42:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-04-06 14:42:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 190. [2022-04-06 14:42:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.027027027027027) internal successors, (190), 185 states have internal predecessors, (190), 3 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) [2022-04-06 14:42:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2022-04-06 14:42:24,172 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 187 [2022-04-06 14:42:24,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:42:24,172 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2022-04-06 14:42:24,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 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) [2022-04-06 14:42:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2022-04-06 14:42:24,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 14:42:24,173 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:42:24,173 INFO L499 BasicCegarLoop]: trace histogram [83, 83, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:42:24,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-06 14:42:24,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:24,394 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:42:24,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:42:24,394 INFO L85 PathProgramCache]: Analyzing trace with hash -982865289, now seen corresponding path program 167 times [2022-04-06 14:42:24,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:24,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1907854932] [2022-04-06 14:42:24,395 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:42:24,395 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:42:24,395 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:42:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash -982865289, now seen corresponding path program 168 times [2022-04-06 14:42:24,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:42:24,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701158731] [2022-04-06 14:42:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:42:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:42:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:26,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:42:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:42:26,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:42:26,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701158731] [2022-04-06 14:42:26,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701158731] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:42:26,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395556055] [2022-04-06 14:42:26,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:42:26,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:26,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:42:26,387 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:42:26,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 14:42:26,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:42:26,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:42:26,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:42:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:42:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-04-06 14:42:27,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:42:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-04-06 14:42:27,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395556055] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:42:27,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:42:27,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 7, 7] total 93 [2022-04-06 14:42:27,438 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:42:27,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1907854932] [2022-04-06 14:42:27,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1907854932] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:42:27,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:42:27,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 14:42:27,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218292852] [2022-04-06 14:42:27,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:42:27,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 14:42:27,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 14:42:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4011, Invalid=4545, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 14:42:27,441 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 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) [2022-04-06 14:42:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:42:45,051 INFO L93 Difference]: Finished difference Result 621 states and 793 transitions. [2022-04-06 14:42:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 14:42:45,051 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 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 189 [2022-04-06 14:42:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:42:45,053 INFO L225 Difference]: With dead ends: 621 [2022-04-06 14:42:45,053 INFO L226 Difference]: Without dead ends: 604 [2022-04-06 14:42:45,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4076 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11572, Invalid=19580, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 14:42:45,054 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2163 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2163 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:42:45,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2163 Valid, 42 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:42:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-04-06 14:42:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 192. [2022-04-06 14:42:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0267379679144386) internal successors, (192), 187 states have internal predecessors, (192), 3 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) [2022-04-06 14:42:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-04-06 14:42:45,271 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 189 [2022-04-06 14:42:45,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:42:45,271 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-04-06 14:42:45,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 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) [2022-04-06 14:42:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-04-06 14:42:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 14:42:45,272 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:42:45,272 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:42:45,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 14:42:45,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:45,473 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:42:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:42:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash -255688683, now seen corresponding path program 169 times [2022-04-06 14:42:45,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:45,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [903747969] [2022-04-06 14:42:45,474 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:42:45,474 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:42:45,474 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:42:45,474 INFO L85 PathProgramCache]: Analyzing trace with hash -255688683, now seen corresponding path program 170 times [2022-04-06 14:42:45,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:42:45,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457733131] [2022-04-06 14:42:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:42:45,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:42:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:47,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:42:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:42:47,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:42:47,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457733131] [2022-04-06 14:42:47,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457733131] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:42:47,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103635638] [2022-04-06 14:42:47,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:42:47,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:47,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:42:47,515 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:42:47,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 14:42:48,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:42:48,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:42:48,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 14:42:48,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:42:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:42:48,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:42:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:42:54,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103635638] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:42:54,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:42:54,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-04-06 14:42:54,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:42:54,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [903747969] [2022-04-06 14:42:54,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [903747969] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:42:54,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:42:54,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 14:42:54,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792055692] [2022-04-06 14:42:54,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:42:54,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 14:42:54,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 14:42:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-04-06 14:42:54,263 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 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) [2022-04-06 14:43:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:43:13,389 INFO L93 Difference]: Finished difference Result 628 states and 802 transitions. [2022-04-06 14:43:13,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 14:43:13,390 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 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 191 [2022-04-06 14:43:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:43:13,391 INFO L225 Difference]: With dead ends: 628 [2022-04-06 14:43:13,391 INFO L226 Difference]: Without dead ends: 611 [2022-04-06 14:43:13,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-04-06 14:43:13,394 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1974 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:43:13,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1974 Valid, 57 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:43:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-04-06 14:43:13,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 194. [2022-04-06 14:43:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0264550264550265) internal successors, (194), 189 states have internal predecessors, (194), 3 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) [2022-04-06 14:43:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-04-06 14:43:13,617 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2022-04-06 14:43:13,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:43:13,617 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-04-06 14:43:13,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 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) [2022-04-06 14:43:13,617 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-04-06 14:43:13,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 14:43:13,617 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:43:13,618 INFO L499 BasicCegarLoop]: trace histogram [85, 85, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:43:13,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-06 14:43:13,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:13,821 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:43:13,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:43:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1518639565, now seen corresponding path program 171 times [2022-04-06 14:43:13,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:13,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1255883457] [2022-04-06 14:43:13,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:43:13,822 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:43:13,822 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:43:13,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1518639565, now seen corresponding path program 172 times [2022-04-06 14:43:13,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:43:13,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750081986] [2022-04-06 14:43:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:43:13,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:43:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:15,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:43:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:43:15,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:43:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750081986] [2022-04-06 14:43:15,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750081986] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:43:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554110040] [2022-04-06 14:43:15,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:43:15,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:15,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:43:15,860 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:43:15,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 14:43:16,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:43:16,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:43:16,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 14:43:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:43:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:43:16,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:43:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:43:22,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554110040] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:43:22,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:43:22,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-04-06 14:43:22,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:43:22,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1255883457] [2022-04-06 14:43:22,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1255883457] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:43:22,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:43:22,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 14:43:22,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140156094] [2022-04-06 14:43:22,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:43:22,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 14:43:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:22,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 14:43:22,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 14:43:22,811 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 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) [2022-04-06 14:43:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:43:42,483 INFO L93 Difference]: Finished difference Result 635 states and 811 transitions. [2022-04-06 14:43:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 14:43:42,484 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 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 193 [2022-04-06 14:43:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:43:42,485 INFO L225 Difference]: With dead ends: 635 [2022-04-06 14:43:42,485 INFO L226 Difference]: Without dead ends: 618 [2022-04-06 14:43:42,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-04-06 14:43:42,488 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2127 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:43:42,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2127 Valid, 47 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:43:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-04-06 14:43:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 196. [2022-04-06 14:43:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 3 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) [2022-04-06 14:43:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2022-04-06 14:43:42,718 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2022-04-06 14:43:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:43:42,718 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2022-04-06 14:43:42,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 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) [2022-04-06 14:43:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2022-04-06 14:43:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 14:43:42,719 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:43:42,719 INFO L499 BasicCegarLoop]: trace histogram [86, 86, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:43:42,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 14:43:42,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:42,920 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:43:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:43:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash 261307601, now seen corresponding path program 173 times [2022-04-06 14:43:42,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:42,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1119690836] [2022-04-06 14:43:42,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:43:42,921 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:43:42,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:43:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash 261307601, now seen corresponding path program 174 times [2022-04-06 14:43:42,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:43:42,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460790132] [2022-04-06 14:43:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:43:42,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:43:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:45,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:43:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:43:45,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:43:45,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460790132] [2022-04-06 14:43:45,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460790132] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:43:45,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616922992] [2022-04-06 14:43:45,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:43:45,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:45,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:43:45,081 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:43:45,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 14:43:45,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:43:45,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:43:45,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:43:45,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:43:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-04-06 14:43:45,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:43:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-04-06 14:43:46,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616922992] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:43:46,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:43:46,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 7, 7] total 96 [2022-04-06 14:43:46,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:43:46,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1119690836] [2022-04-06 14:43:46,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1119690836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:43:46,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:43:46,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 14:43:46,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831999452] [2022-04-06 14:43:46,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:43:46,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 14:43:46,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 14:43:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4284, Invalid=4836, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 14:43:46,214 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 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) [2022-04-06 14:44:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:44:06,141 INFO L93 Difference]: Finished difference Result 642 states and 820 transitions. [2022-04-06 14:44:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 14:44:06,142 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 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 195 [2022-04-06 14:44:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:44:06,143 INFO L225 Difference]: With dead ends: 642 [2022-04-06 14:44:06,143 INFO L226 Difference]: Without dead ends: 625 [2022-04-06 14:44:06,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 385 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4352 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12376, Invalid=20930, Unknown=0, NotChecked=0, Total=33306 [2022-04-06 14:44:06,144 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2203 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 14:44:06,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2203 Valid, 37 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 14:44:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-04-06 14:44:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 198. [2022-04-06 14:44:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 3 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) [2022-04-06 14:44:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2022-04-06 14:44:06,386 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 195 [2022-04-06 14:44:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:44:06,386 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2022-04-06 14:44:06,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 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) [2022-04-06 14:44:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2022-04-06 14:44:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 14:44:06,387 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:44:06,387 INFO L499 BasicCegarLoop]: trace histogram [87, 87, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:44:06,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-04-06 14:44:06,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 14:44:06,588 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:44:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:44:06,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550319, now seen corresponding path program 175 times [2022-04-06 14:44:06,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:06,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [604694401] [2022-04-06 14:44:06,589 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:44:06,589 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:44:06,589 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:44:06,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550319, now seen corresponding path program 176 times [2022-04-06 14:44:06,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:44:06,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523279288] [2022-04-06 14:44:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:44:06,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:44:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:08,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:44:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:44:08,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:44:08,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523279288] [2022-04-06 14:44:08,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523279288] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:44:08,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330996967] [2022-04-06 14:44:08,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:44:08,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:44:08,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:44:08,781 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:44:08,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 14:44:09,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:44:09,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:44:09,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 14:44:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:44:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:44:09,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:44:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:44:16,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330996967] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:44:16,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:44:16,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-04-06 14:44:16,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:44:16,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [604694401] [2022-04-06 14:44:16,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [604694401] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:44:16,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:44:16,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 14:44:16,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15750465] [2022-04-06 14:44:16,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:44:16,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 14:44:16,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:16,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 14:44:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 14:44:16,129 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 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) [2022-04-06 14:44:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:44:36,374 INFO L93 Difference]: Finished difference Result 649 states and 829 transitions. [2022-04-06 14:44:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 14:44:36,375 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 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 197 [2022-04-06 14:44:36,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:44:36,376 INFO L225 Difference]: With dead ends: 649 [2022-04-06 14:44:36,376 INFO L226 Difference]: Without dead ends: 632 [2022-04-06 14:44:36,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4349 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=31686, Invalid=39870, Unknown=0, NotChecked=0, Total=71556 [2022-04-06 14:44:36,378 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2162 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2162 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:44:36,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2162 Valid, 42 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:44:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-04-06 14:44:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 200. [2022-04-06 14:44:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0256410256410255) internal successors, (200), 195 states have internal predecessors, (200), 3 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) [2022-04-06 14:44:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2022-04-06 14:44:36,617 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 197 [2022-04-06 14:44:36,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:44:36,617 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2022-04-06 14:44:36,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 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) [2022-04-06 14:44:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2022-04-06 14:44:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 14:44:36,618 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:44:36,618 INFO L499 BasicCegarLoop]: trace histogram [88, 88, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:44:36,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-06 14:44:36,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:44:36,819 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:44:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:44:36,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1442890867, now seen corresponding path program 177 times [2022-04-06 14:44:36,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:36,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [285090202] [2022-04-06 14:44:36,820 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:44:36,820 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:44:36,820 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:44:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1442890867, now seen corresponding path program 178 times [2022-04-06 14:44:36,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:44:36,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557627307] [2022-04-06 14:44:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:44:36,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:44:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:39,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:44:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:44:39,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:44:39,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557627307] [2022-04-06 14:44:39,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557627307] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:44:39,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304850944] [2022-04-06 14:44:39,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:44:39,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:44:39,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:44:39,029 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:44:39,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 14:44:39,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:44:39,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:44:39,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 14:44:39,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:44:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:44:39,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:44:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:44:46,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304850944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:44:46,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:44:46,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-04-06 14:44:46,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:44:46,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [285090202] [2022-04-06 14:44:46,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [285090202] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:44:46,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:44:46,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 14:44:46,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52769016] [2022-04-06 14:44:46,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:44:46,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 14:44:46,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 14:44:46,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16292, Invalid=16650, Unknown=0, NotChecked=0, Total=32942 [2022-04-06 14:44:46,403 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 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) [2022-04-06 14:45:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:45:08,046 INFO L93 Difference]: Finished difference Result 656 states and 838 transitions. [2022-04-06 14:45:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 14:45:08,046 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 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 199 [2022-04-06 14:45:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:45:08,047 INFO L225 Difference]: With dead ends: 656 [2022-04-06 14:45:08,047 INFO L226 Difference]: Without dead ends: 639 [2022-04-06 14:45:08,050 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=32402, Invalid=40768, Unknown=0, NotChecked=0, Total=73170 [2022-04-06 14:45:08,050 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2391 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2391 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 14:45:08,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2391 Valid, 27 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 14:45:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-04-06 14:45:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 202. [2022-04-06 14:45:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0253807106598984) internal successors, (202), 197 states have internal predecessors, (202), 3 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) [2022-04-06 14:45:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2022-04-06 14:45:08,297 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 199 [2022-04-06 14:45:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:45:08,297 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2022-04-06 14:45:08,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 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) [2022-04-06 14:45:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2022-04-06 14:45:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-04-06 14:45:08,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:45:08,298 INFO L499 BasicCegarLoop]: trace histogram [89, 89, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:45:08,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-06 14:45:08,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:45:08,499 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:45:08,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:45:08,499 INFO L85 PathProgramCache]: Analyzing trace with hash 41362347, now seen corresponding path program 179 times [2022-04-06 14:45:08,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:45:08,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1854118135] [2022-04-06 14:45:08,500 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:45:08,500 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:45:08,500 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:45:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash 41362347, now seen corresponding path program 180 times [2022-04-06 14:45:08,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:45:08,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437776194] [2022-04-06 14:45:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:45:08,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:45:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:45:10,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:45:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:45:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7931 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 14:45:10,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:45:10,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437776194] [2022-04-06 14:45:10,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437776194] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:45:10,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856276870] [2022-04-06 14:45:10,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:45:10,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:45:10,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:45:10,781 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:45:10,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 14:45:11,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:45:11,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:45:11,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:45:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:45:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7931 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-04-06 14:45:11,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:45:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7931 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-04-06 14:45:11,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856276870] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:45:11,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:45:11,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 7, 7] total 99 [2022-04-06 14:45:11,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:45:11,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1854118135] [2022-04-06 14:45:11,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1854118135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:45:11,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:45:11,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 14:45:11,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929891431] [2022-04-06 14:45:11,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:45:11,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 14:45:11,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:45:11,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 14:45:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4566, Invalid=5136, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 14:45:11,944 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 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)