/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_2-2-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:49:55,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:49:55,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:49:55,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 12:49:55,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:49:55,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:49:55,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:49:55,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 12:49:55,321 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:49:55,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:49:55,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:49:55,323 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 12:49:55,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:49:55,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 12:49:55,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:49:55,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:49:55,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:49:55,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:49:55,324 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 12:49:55,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:49:55,324 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:49:55,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:49:55,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:49:55,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:49:55,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 12:49:55,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:49:55,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:49:55,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:49:55,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 12:49:55,325 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 12:49:55,325 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 12:49:55,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:49:55,325 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 12:49:55,325 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:49:55,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:49:55,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:49:55,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:49:55,512 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:49:55,513 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:49:55,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2022-03-20 12:49:55,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c359d709c/ea197a94126f41c786c420f2cc4989ad/FLAGdc7c94485 [2022-03-20 12:49:55,968 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:49:55,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2022-03-20 12:49:55,974 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c359d709c/ea197a94126f41c786c420f2cc4989ad/FLAGdc7c94485 [2022-03-20 12:49:55,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c359d709c/ea197a94126f41c786c420f2cc4989ad [2022-03-20 12:49:55,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:49:55,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 12:49:55,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:49:55,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:49:55,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:49:55,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:49:55" (1/1) ... [2022-03-20 12:49:55,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa24bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:49:55, skipping insertion in model container [2022-03-20 12:49:55,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:49:55" (1/1) ... [2022-03-20 12:49:55,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:49:56,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:49:56,112 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_2-2-simple.i[809,822] [2022-03-20 12:49:56,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:49:56,132 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:49:56,140 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_2-2-simple.i[809,822] [2022-03-20 12:49:56,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:49:56,151 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:49:56,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:49:56 WrapperNode [2022-03-20 12:49:56,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:49:56,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:49:56,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:49:56,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:49:56,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:49:56" (1/1) ... [2022-03-20 12:49:56,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:49:56" (1/1) ... [2022-03-20 12:49:56,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:49:56" (1/1) ... [2022-03-20 12:49:56,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:49:56" (1/1) ... [2022-03-20 12:49:56,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:49:56" (1/1) ... [2022-03-20 12:49:56,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:49:56" (1/1) ... [2022-03-20 12:49:56,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:49:56" (1/1) ... [2022-03-20 12:49:56,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:49:56,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:49:56,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:49:56,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:49:56,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:49:56" (1/1) ... [2022-03-20 12:49:56,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:49:56,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:56,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 12:49:56,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 12:49:56,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:49:56,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:49:56,240 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:49:56,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 12:49:56,240 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:49:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:49:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:49:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 12:49:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 12:49:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:49:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:49:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 12:49:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:49:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 12:49:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-20 12:49:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:49:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:49:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:49:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:49:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:49:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:49:56,304 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:49:56,306 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:49:56,430 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:49:56,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:49:56,434 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 12:49:56,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:49:56 BoogieIcfgContainer [2022-03-20 12:49:56,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:49:56,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:49:56,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:49:56,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:49:56,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:49:55" (1/3) ... [2022-03-20 12:49:56,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9b4828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:49:56, skipping insertion in model container [2022-03-20 12:49:56,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:49:56" (2/3) ... [2022-03-20 12:49:56,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9b4828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:49:56, skipping insertion in model container [2022-03-20 12:49:56,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:49:56" (3/3) ... [2022-03-20 12:49:56,441 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.i [2022-03-20 12:49:56,444 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:49:56,444 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:49:56,472 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:49:56,477 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 12:49:56,477 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:49:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2022-03-20 12:49:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 12:49:56,490 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:56,490 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:56,490 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:56,494 INFO L85 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 1 times [2022-03-20 12:49:56,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:56,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [230061766] [2022-03-20 12:49:56,506 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:49:56,506 INFO L85 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 2 times [2022-03-20 12:49:56,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:56,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018482708] [2022-03-20 12:49:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:56,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:56,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:56,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:56,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018482708] [2022-03-20 12:49:56,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018482708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:56,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:56,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:49:56,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [230061766] [2022-03-20 12:49:56,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [230061766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:56,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:56,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:49:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179261459] [2022-03-20 12:49:56,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:56,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 12:49:56,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:56,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 12:49:56,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:49:56,652 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:56,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:56,676 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-20 12:49:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 12:49:56,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 12:49:56,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:56,682 INFO L225 Difference]: With dead ends: 34 [2022-03-20 12:49:56,682 INFO L226 Difference]: Without dead ends: 14 [2022-03-20 12:49:56,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:49:56,686 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 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 [2022-03-20 12:49:56,686 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:49:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-20 12:49:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-20 12:49:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-03-20 12:49:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-20 12:49:56,706 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-03-20 12:49:56,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:56,707 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-20 12:49:56,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:56,707 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-20 12:49:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 12:49:56,708 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:56,708 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:56,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:49:56,708 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:56,709 INFO L85 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 1 times [2022-03-20 12:49:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:56,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1235893485] [2022-03-20 12:49:56,710 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:49:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 2 times [2022-03-20 12:49:56,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:56,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565326248] [2022-03-20 12:49:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:56,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:56,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565326248] [2022-03-20 12:49:56,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565326248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:56,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:56,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:49:56,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:56,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1235893485] [2022-03-20 12:49:56,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1235893485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:56,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:56,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:49:56,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348397167] [2022-03-20 12:49:56,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:56,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:49:56,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:56,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:49:56,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:49:56,761 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:56,783 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-03-20 12:49:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:49:56,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 12:49:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:56,784 INFO L225 Difference]: With dead ends: 22 [2022-03-20 12:49:56,784 INFO L226 Difference]: Without dead ends: 16 [2022-03-20 12:49:56,784 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 [2022-03-20 12:49:56,785 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:56,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:49:56,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-20 12:49:56,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-03-20 12:49:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2022-03-20 12:49:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-20 12:49:56,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-03-20 12:49:56,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:56,790 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-20 12:49:56,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:56,790 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-20 12:49:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 12:49:56,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:56,791 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:56,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:49:56,791 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:56,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 1 times [2022-03-20 12:49:56,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:56,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1648364918] [2022-03-20 12:49:56,803 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:56,803 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:56,803 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 2 times [2022-03-20 12:49:56,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:56,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241564182] [2022-03-20 12:49:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:56,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:56,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:56,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:56,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241564182] [2022-03-20 12:49:56,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241564182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:56,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612434538] [2022-03-20 12:49:56,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:49:56,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:56,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:56,850 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:56,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 12:49:56,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:49:56,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:56,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 12:49:56,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:56,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:56,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612434538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:56,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:56,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 12:49:56,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1648364918] [2022-03-20 12:49:56,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1648364918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:56,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:56,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:49:56,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640808640] [2022-03-20 12:49:56,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:56,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:49:56,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:56,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:49:56,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 12:49:56,986 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:57,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:57,023 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-03-20 12:49:57,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:49:57,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 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 14 [2022-03-20 12:49:57,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:57,024 INFO L225 Difference]: With dead ends: 24 [2022-03-20 12:49:57,024 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 12:49:57,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 12:49:57,025 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:57,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:49:57,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 12:49:57,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-03-20 12:49:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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) [2022-03-20 12:49:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-20 12:49:57,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2022-03-20 12:49:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:57,030 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-20 12:49:57,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-20 12:49:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 12:49:57,031 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:57,031 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:57,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:57,247 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 [2022-03-20 12:49:57,247 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:57,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:57,248 INFO L85 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 3 times [2022-03-20 12:49:57,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:57,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1111387550] [2022-03-20 12:49:57,250 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:57,251 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:57,251 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 4 times [2022-03-20 12:49:57,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:57,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191332175] [2022-03-20 12:49:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:57,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:57,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:57,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:57,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191332175] [2022-03-20 12:49:57,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191332175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:57,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357428249] [2022-03-20 12:49:57,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:49:57,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:57,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:57,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:57,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 12:49:57,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:49:57,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:57,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:49:57,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:57,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:57,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357428249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:57,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:57,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 12:49:57,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:57,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1111387550] [2022-03-20 12:49:57,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1111387550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:57,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:57,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:49:57,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060018839] [2022-03-20 12:49:57,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:57,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:49:57,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:49:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 12:49:57,489 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:57,541 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-03-20 12:49:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:49:57,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 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 16 [2022-03-20 12:49:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:57,543 INFO L225 Difference]: With dead ends: 26 [2022-03-20 12:49:57,543 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 12:49:57,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-03-20 12:49:57,547 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:57,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:49:57,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 12:49:57,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-03-20 12:49:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2022-03-20 12:49:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-03-20 12:49:57,551 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2022-03-20 12:49:57,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:57,551 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-03-20 12:49:57,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-03-20 12:49:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 12:49:57,552 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:57,552 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:57,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:57,752 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 [2022-03-20 12:49:57,753 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:57,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 5 times [2022-03-20 12:49:57,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:57,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1120078997] [2022-03-20 12:49:57,756 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:57,757 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:57,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:57,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 6 times [2022-03-20 12:49:57,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:57,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523153295] [2022-03-20 12:49:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:57,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:57,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:57,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523153295] [2022-03-20 12:49:57,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523153295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206803576] [2022-03-20 12:49:57,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:49:57,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:57,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:57,854 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:57,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 12:49:57,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 12:49:57,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:57,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 12:49:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:57,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:58,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206803576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:58,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:58,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-20 12:49:58,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:58,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1120078997] [2022-03-20 12:49:58,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1120078997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:58,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:58,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:49:58,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046968837] [2022-03-20 12:49:58,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:58,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:49:58,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:58,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:49:58,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-20 12:49:58,035 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:58,083 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-03-20 12:49:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:49:58,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 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 18 [2022-03-20 12:49:58,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:58,084 INFO L225 Difference]: With dead ends: 28 [2022-03-20 12:49:58,084 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 12:49:58,085 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-03-20 12:49:58,085 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:58,086 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:49:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 12:49:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-20 12:49:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 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) [2022-03-20 12:49:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-03-20 12:49:58,089 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2022-03-20 12:49:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:58,089 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-03-20 12:49:58,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-03-20 12:49:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 12:49:58,090 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:58,090 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:58,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:58,307 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 [2022-03-20 12:49:58,307 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:58,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 7 times [2022-03-20 12:49:58,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:58,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [914108480] [2022-03-20 12:49:58,310 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:58,310 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:58,310 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:58,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 8 times [2022-03-20 12:49:58,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:58,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972118887] [2022-03-20 12:49:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:58,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:58,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:58,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972118887] [2022-03-20 12:49:58,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972118887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:58,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351893901] [2022-03-20 12:49:58,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:49:58,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:58,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:58,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:58,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 12:49:58,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:49:58,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:58,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:49:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:58,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:58,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351893901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:58,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:58,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 12:49:58,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:58,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [914108480] [2022-03-20 12:49:58,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [914108480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:58,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:58,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:49:58,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227934448] [2022-03-20 12:49:58,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:58,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:49:58,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:58,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:49:58,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 12:49:58,573 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:58,640 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-20 12:49:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:49:58,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 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 20 [2022-03-20 12:49:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:58,642 INFO L225 Difference]: With dead ends: 30 [2022-03-20 12:49:58,643 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 12:49:58,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-20 12:49:58,645 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:58,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:49:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 12:49:58,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-03-20 12:49:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 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) [2022-03-20 12:49:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-03-20 12:49:58,654 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2022-03-20 12:49:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:58,654 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-03-20 12:49:58,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-03-20 12:49:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 12:49:58,655 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:58,655 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:58,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:58,871 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 [2022-03-20 12:49:58,871 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 9 times [2022-03-20 12:49:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:58,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2072481957] [2022-03-20 12:49:58,873 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:58,873 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:58,873 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:58,873 INFO L85 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 10 times [2022-03-20 12:49:58,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:58,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025549551] [2022-03-20 12:49:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:58,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:58,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:58,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025549551] [2022-03-20 12:49:58,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025549551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957001593] [2022-03-20 12:49:58,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:49:58,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:58,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:58,954 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:58,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 12:49:59,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:49:59,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:59,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:49:59,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:59,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:59,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957001593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:59,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:59,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-20 12:49:59,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:59,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2072481957] [2022-03-20 12:49:59,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2072481957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:59,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:59,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 12:49:59,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819557372] [2022-03-20 12:49:59,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:59,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 12:49:59,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:59,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 12:49:59,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-03-20 12:49:59,146 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:59,204 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-03-20 12:49:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 12:49:59,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 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 22 [2022-03-20 12:49:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:59,205 INFO L225 Difference]: With dead ends: 32 [2022-03-20 12:49:59,205 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 12:49:59,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-03-20 12:49:59,205 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:59,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:49:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 12:49:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-20 12:49:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 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) [2022-03-20 12:49:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-03-20 12:49:59,209 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2022-03-20 12:49:59,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:59,209 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-03-20 12:49:59,209 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:59,210 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-03-20 12:49:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 12:49:59,210 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:59,210 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:59,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:59,428 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 [2022-03-20 12:49:59,428 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:59,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 11 times [2022-03-20 12:49:59,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:59,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [281986664] [2022-03-20 12:49:59,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:59,430 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:59,430 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:59,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 12 times [2022-03-20 12:49:59,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:59,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430014543] [2022-03-20 12:49:59,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:59,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:59,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:59,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:59,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430014543] [2022-03-20 12:49:59,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430014543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:59,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367305628] [2022-03-20 12:49:59,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:49:59,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:59,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:59,488 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:59,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 12:49:59,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 12:49:59,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:59,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 12:49:59,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:59,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:49:59,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367305628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:59,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:59,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 12:49:59,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:59,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [281986664] [2022-03-20 12:49:59,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [281986664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:59,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:59,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 12:49:59,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950679344] [2022-03-20 12:49:59,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:59,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 12:49:59,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:59,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 12:49:59,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:49:59,679 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:59,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:59,744 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-03-20 12:49:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 12:49:59,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 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 24 [2022-03-20 12:49:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:59,745 INFO L225 Difference]: With dead ends: 34 [2022-03-20 12:49:59,745 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 12:49:59,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-03-20 12:49:59,746 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:59,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:49:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 12:49:59,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-20 12:49:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 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) [2022-03-20 12:49:59,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-03-20 12:49:59,749 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2022-03-20 12:49:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:59,749 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-03-20 12:49:59,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:59,750 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-03-20 12:49:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:49:59,750 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:59,750 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:59,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:59,967 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 [2022-03-20 12:49:59,967 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:59,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 13 times [2022-03-20 12:49:59,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:59,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [481736978] [2022-03-20 12:49:59,969 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:59,969 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:59,969 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:59,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 14 times [2022-03-20 12:49:59,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:59,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357653562] [2022-03-20 12:49:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:59,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:00,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:00,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:00,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357653562] [2022-03-20 12:50:00,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357653562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:00,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335705296] [2022-03-20 12:50:00,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:00,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:00,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:00,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:00,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 12:50:00,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:00,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:00,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 12:50:00,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:00,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:00,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335705296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:00,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:00,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-20 12:50:00,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:00,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [481736978] [2022-03-20 12:50:00,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [481736978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:00,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:00,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 12:50:00,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904781448] [2022-03-20 12:50:00,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:00,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 12:50:00,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 12:50:00,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-20 12:50:00,238 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:00,336 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-03-20 12:50:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 12:50:00,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 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 26 [2022-03-20 12:50:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:00,337 INFO L225 Difference]: With dead ends: 36 [2022-03-20 12:50:00,337 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 12:50:00,337 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-20 12:50:00,337 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:00,338 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:50:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 12:50:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-20 12:50:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 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) [2022-03-20 12:50:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-03-20 12:50:00,341 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2022-03-20 12:50:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:00,341 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-03-20 12:50:00,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-03-20 12:50:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:50:00,342 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:00,342 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:00,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:00,558 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 [2022-03-20 12:50:00,558 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:00,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 15 times [2022-03-20 12:50:00,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:00,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [373039101] [2022-03-20 12:50:00,560 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:00,561 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:00,561 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:00,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 16 times [2022-03-20 12:50:00,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:00,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722828581] [2022-03-20 12:50:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:00,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:00,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:00,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:00,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722828581] [2022-03-20 12:50:00,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722828581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:00,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137043033] [2022-03-20 12:50:00,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:00,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:00,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:00,627 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:00,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 12:50:00,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:00,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:00,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 12:50:00,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:00,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:00,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137043033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:00,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:00,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-20 12:50:00,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:00,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [373039101] [2022-03-20 12:50:00,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [373039101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:00,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:00,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 12:50:00,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082954505] [2022-03-20 12:50:00,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:00,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 12:50:00,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 12:50:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-20 12:50:00,859 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:00,950 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-03-20 12:50:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 12:50:00,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 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 28 [2022-03-20 12:50:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:00,951 INFO L225 Difference]: With dead ends: 38 [2022-03-20 12:50:00,951 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 12:50:00,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-03-20 12:50:00,952 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:00,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 24 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:50:00,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 12:50:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-03-20 12:50:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2022-03-20 12:50:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-20 12:50:00,956 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2022-03-20 12:50:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:00,956 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-20 12:50:00,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-20 12:50:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 12:50:00,956 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:00,957 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:00,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:01,173 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 [2022-03-20 12:50:01,173 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:01,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:01,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 17 times [2022-03-20 12:50:01,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:01,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1058166721] [2022-03-20 12:50:01,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:01,175 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:01,175 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:01,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 18 times [2022-03-20 12:50:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:01,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083088843] [2022-03-20 12:50:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:01,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:01,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:01,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:01,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083088843] [2022-03-20 12:50:01,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083088843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:01,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489390144] [2022-03-20 12:50:01,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:01,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:01,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:01,252 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:01,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 12:50:01,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 12:50:01,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:01,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 12:50:01,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:01,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:01,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489390144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:01,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:01,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-20 12:50:01,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:01,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1058166721] [2022-03-20 12:50:01,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1058166721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:01,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:01,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 12:50:01,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835317271] [2022-03-20 12:50:01,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:01,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 12:50:01,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 12:50:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-20 12:50:01,545 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:01,648 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-03-20 12:50:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 12:50:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 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 30 [2022-03-20 12:50:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:01,649 INFO L225 Difference]: With dead ends: 40 [2022-03-20 12:50:01,649 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 12:50:01,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 12:50:01,650 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:01,650 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:50:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 12:50:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-03-20 12:50:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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) [2022-03-20 12:50:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-03-20 12:50:01,654 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2022-03-20 12:50:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:01,654 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-03-20 12:50:01,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-03-20 12:50:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 12:50:01,655 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:01,655 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:01,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:01,856 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 [2022-03-20 12:50:01,856 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 19 times [2022-03-20 12:50:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:01,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1315656967] [2022-03-20 12:50:01,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:01,858 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:01,858 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:01,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 20 times [2022-03-20 12:50:01,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:01,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564094473] [2022-03-20 12:50:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:01,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:01,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:01,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:01,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564094473] [2022-03-20 12:50:01,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564094473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:01,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861092761] [2022-03-20 12:50:01,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:01,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:01,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:01,944 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:01,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 12:50:02,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:02,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 12:50:02,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:02,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:02,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861092761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:02,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:02,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 12:50:02,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:02,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1315656967] [2022-03-20 12:50:02,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1315656967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:02,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:02,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 12:50:02,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722379884] [2022-03-20 12:50:02,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:02,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 12:50:02,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:02,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 12:50:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 12:50:02,249 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:02,378 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-03-20 12:50:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 12:50:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 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 32 [2022-03-20 12:50:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:02,379 INFO L225 Difference]: With dead ends: 42 [2022-03-20 12:50:02,379 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 12:50:02,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 12:50:02,381 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:02,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:50:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 12:50:02,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 12:50:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 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) [2022-03-20 12:50:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-03-20 12:50:02,386 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2022-03-20 12:50:02,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:02,386 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-03-20 12:50:02,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-03-20 12:50:02,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 12:50:02,387 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:02,387 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:02,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:02,587 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 [2022-03-20 12:50:02,588 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 21 times [2022-03-20 12:50:02,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:02,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267452702] [2022-03-20 12:50:02,589 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:02,589 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:02,589 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:02,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 22 times [2022-03-20 12:50:02,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:02,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637356386] [2022-03-20 12:50:02,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:02,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:02,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:02,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:02,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637356386] [2022-03-20 12:50:02,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637356386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:02,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380424796] [2022-03-20 12:50:02,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:02,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:02,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:02,680 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:02,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 12:50:02,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:02,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:02,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 12:50:02,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:02,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:03,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380424796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:03,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:03,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-20 12:50:03,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:03,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267452702] [2022-03-20 12:50:03,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267452702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:03,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:03,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 12:50:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439324761] [2022-03-20 12:50:03,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:03,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 12:50:03,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 12:50:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-03-20 12:50:03,011 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:03,141 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-03-20 12:50:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 12:50:03,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 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 34 [2022-03-20 12:50:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:03,142 INFO L225 Difference]: With dead ends: 44 [2022-03-20 12:50:03,142 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 12:50:03,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 12:50:03,143 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:03,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 19 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:50:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 12:50:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-20 12:50:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 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) [2022-03-20 12:50:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-03-20 12:50:03,147 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2022-03-20 12:50:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:03,147 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-03-20 12:50:03,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-03-20 12:50:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 12:50:03,148 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:03,148 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:03,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:03,361 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 [2022-03-20 12:50:03,361 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:03,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:03,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 23 times [2022-03-20 12:50:03,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:03,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1655680692] [2022-03-20 12:50:03,363 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:03,363 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:03,363 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:03,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 24 times [2022-03-20 12:50:03,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:03,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445264782] [2022-03-20 12:50:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:03,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:03,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:03,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:03,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445264782] [2022-03-20 12:50:03,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445264782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:03,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425175932] [2022-03-20 12:50:03,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:03,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:03,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:03,460 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:03,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 12:50:03,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 12:50:03,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 12:50:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:03,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:03,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425175932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:03,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:03,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-20 12:50:03,926 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:03,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1655680692] [2022-03-20 12:50:03,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1655680692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:03,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:03,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 12:50:03,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877652510] [2022-03-20 12:50:03,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:03,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 12:50:03,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 12:50:03,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-03-20 12:50:03,927 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:04,074 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-03-20 12:50:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 12:50:04,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 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 36 [2022-03-20 12:50:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:04,075 INFO L225 Difference]: With dead ends: 46 [2022-03-20 12:50:04,075 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 12:50:04,075 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 12:50:04,076 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:04,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:50:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 12:50:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-20 12:50:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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) [2022-03-20 12:50:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-03-20 12:50:04,082 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2022-03-20 12:50:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:04,082 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-03-20 12:50:04,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:04,083 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-03-20 12:50:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 12:50:04,083 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:04,083 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:04,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:04,301 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 [2022-03-20 12:50:04,301 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 25 times [2022-03-20 12:50:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:04,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [721668825] [2022-03-20 12:50:04,303 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:04,303 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:04,303 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:04,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 26 times [2022-03-20 12:50:04,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:04,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494763055] [2022-03-20 12:50:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:04,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:04,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:04,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494763055] [2022-03-20 12:50:04,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494763055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937896951] [2022-03-20 12:50:04,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:04,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:04,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:04,432 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:04,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 12:50:04,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:04,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 12:50:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:04,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:04,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937896951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:04,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:04,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-20 12:50:04,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [721668825] [2022-03-20 12:50:04,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [721668825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:04,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:04,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 12:50:04,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359422964] [2022-03-20 12:50:04,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:04,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 12:50:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:04,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 12:50:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-20 12:50:04,803 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:04,990 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-03-20 12:50:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 12:50:04,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 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 38 [2022-03-20 12:50:04,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:04,990 INFO L225 Difference]: With dead ends: 48 [2022-03-20 12:50:04,991 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 12:50:04,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 12:50:04,992 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:04,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 29 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 12:50:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-20 12:50:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 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) [2022-03-20 12:50:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-03-20 12:50:04,997 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2022-03-20 12:50:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:04,997 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-03-20 12:50:04,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:04,997 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-03-20 12:50:04,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 12:50:04,997 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:04,997 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:05,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 12:50:05,213 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 [2022-03-20 12:50:05,214 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:05,214 INFO L85 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 27 times [2022-03-20 12:50:05,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:05,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638097440] [2022-03-20 12:50:05,216 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:05,216 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:05,216 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:05,216 INFO L85 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 28 times [2022-03-20 12:50:05,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:05,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107396152] [2022-03-20 12:50:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:05,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:05,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:05,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:05,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107396152] [2022-03-20 12:50:05,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107396152] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:05,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805993307] [2022-03-20 12:50:05,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:05,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:05,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:05,368 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:05,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 12:50:05,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:05,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:05,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 12:50:05,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:05,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:05,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805993307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:05,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:05,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-20 12:50:05,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:05,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638097440] [2022-03-20 12:50:05,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638097440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:05,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:05,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 12:50:05,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8167241] [2022-03-20 12:50:05,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:05,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 12:50:05,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:05,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 12:50:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 12:50:05,783 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:05,954 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-03-20 12:50:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 12:50:05,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 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 40 [2022-03-20 12:50:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:05,955 INFO L225 Difference]: With dead ends: 50 [2022-03-20 12:50:05,955 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 12:50:05,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 12:50:05,957 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:05,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 29 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:50:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 12:50:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-20 12:50:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 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) [2022-03-20 12:50:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-03-20 12:50:05,961 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2022-03-20 12:50:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:05,961 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-03-20 12:50:05,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-03-20 12:50:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 12:50:05,962 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:05,962 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:05,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:06,170 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 [2022-03-20 12:50:06,171 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:06,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 29 times [2022-03-20 12:50:06,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:06,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1077921527] [2022-03-20 12:50:06,173 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:06,173 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:06,173 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:06,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 30 times [2022-03-20 12:50:06,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:06,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308244306] [2022-03-20 12:50:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:06,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:06,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:06,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:06,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308244306] [2022-03-20 12:50:06,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308244306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:06,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718153233] [2022-03-20 12:50:06,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:06,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:06,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:06,313 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:06,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 12:50:06,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 12:50:06,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:06,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 12:50:06,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:06,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:06,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718153233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:06,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:06,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-20 12:50:06,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:06,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1077921527] [2022-03-20 12:50:06,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1077921527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:06,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:06,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 12:50:06,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562330274] [2022-03-20 12:50:06,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:06,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 12:50:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 12:50:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 12:50:06,932 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:07,112 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-03-20 12:50:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 12:50:07,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 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 42 [2022-03-20 12:50:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:07,113 INFO L225 Difference]: With dead ends: 52 [2022-03-20 12:50:07,113 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 12:50:07,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 12:50:07,114 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:07,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:50:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 12:50:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-20 12:50:07,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 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) [2022-03-20 12:50:07,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-03-20 12:50:07,119 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2022-03-20 12:50:07,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:07,119 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-03-20 12:50:07,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:07,119 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-03-20 12:50:07,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 12:50:07,120 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:07,120 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:07,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:07,331 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 [2022-03-20 12:50:07,331 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 31 times [2022-03-20 12:50:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:07,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [164176150] [2022-03-20 12:50:07,333 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:07,333 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:07,333 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:07,333 INFO L85 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 32 times [2022-03-20 12:50:07,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:07,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549567442] [2022-03-20 12:50:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:07,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:07,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:07,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:07,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549567442] [2022-03-20 12:50:07,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549567442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:07,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081785370] [2022-03-20 12:50:07,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:07,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:07,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:07,512 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:07,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 12:50:07,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:07,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:07,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 12:50:07,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:07,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:08,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081785370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:08,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:08,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-20 12:50:08,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:08,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [164176150] [2022-03-20 12:50:08,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [164176150] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:08,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:08,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 12:50:08,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203892745] [2022-03-20 12:50:08,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:08,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 12:50:08,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:08,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 12:50:08,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 12:50:08,019 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:08,206 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-03-20 12:50:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 12:50:08,206 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 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 44 [2022-03-20 12:50:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:08,207 INFO L225 Difference]: With dead ends: 54 [2022-03-20 12:50:08,207 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 12:50:08,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 12:50:08,208 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:08,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:50:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 12:50:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-20 12:50:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 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) [2022-03-20 12:50:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-03-20 12:50:08,213 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2022-03-20 12:50:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:08,213 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-03-20 12:50:08,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-03-20 12:50:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 12:50:08,214 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:08,214 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:08,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:08,423 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 [2022-03-20 12:50:08,423 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:08,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:08,423 INFO L85 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 33 times [2022-03-20 12:50:08,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:08,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1995085103] [2022-03-20 12:50:08,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:08,425 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:08,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:08,425 INFO L85 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 34 times [2022-03-20 12:50:08,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:08,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634010500] [2022-03-20 12:50:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:08,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:08,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:08,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:08,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634010500] [2022-03-20 12:50:08,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634010500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:08,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114201880] [2022-03-20 12:50:08,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:08,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:08,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:08,578 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:08,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 12:50:08,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:08,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:08,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 12:50:08,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:08,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:09,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114201880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:09,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:09,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-20 12:50:09,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:09,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1995085103] [2022-03-20 12:50:09,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1995085103] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:09,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:09,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 12:50:09,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154690663] [2022-03-20 12:50:09,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:09,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 12:50:09,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:09,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 12:50:09,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 12:50:09,095 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:09,309 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-03-20 12:50:09,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 12:50:09,309 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 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 46 [2022-03-20 12:50:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:09,310 INFO L225 Difference]: With dead ends: 56 [2022-03-20 12:50:09,310 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 12:50:09,311 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 12:50:09,311 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:09,311 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 12:50:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-20 12:50:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 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) [2022-03-20 12:50:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-03-20 12:50:09,316 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2022-03-20 12:50:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:09,316 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-03-20 12:50:09,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-03-20 12:50:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 12:50:09,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:09,317 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:09,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:09,523 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 [2022-03-20 12:50:09,524 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:09,524 INFO L85 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 35 times [2022-03-20 12:50:09,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:09,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1258697429] [2022-03-20 12:50:09,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:09,526 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:09,526 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:09,526 INFO L85 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 36 times [2022-03-20 12:50:09,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:09,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982085008] [2022-03-20 12:50:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:09,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:09,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:09,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:09,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982085008] [2022-03-20 12:50:09,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982085008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:09,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172724249] [2022-03-20 12:50:09,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:09,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:09,710 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:09,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 12:50:10,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 12:50:10,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:10,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 12:50:10,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:10,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:10,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172724249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:10,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:10,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-20 12:50:10,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:10,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1258697429] [2022-03-20 12:50:10,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1258697429] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:10,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:10,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 12:50:10,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15767060] [2022-03-20 12:50:10,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:10,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 12:50:10,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 12:50:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 12:50:10,668 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:10,900 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-03-20 12:50:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 12:50:10,901 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 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 48 [2022-03-20 12:50:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:10,901 INFO L225 Difference]: With dead ends: 58 [2022-03-20 12:50:10,901 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 12:50:10,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 12:50:10,903 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:10,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 29 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 12:50:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-20 12:50:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 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) [2022-03-20 12:50:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-03-20 12:50:10,910 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2022-03-20 12:50:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:10,910 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-03-20 12:50:10,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:10,910 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-03-20 12:50:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 12:50:10,911 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:10,911 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:10,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:11,131 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 [2022-03-20 12:50:11,131 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 37 times [2022-03-20 12:50:11,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:11,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220174071] [2022-03-20 12:50:11,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:11,133 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:11,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:11,133 INFO L85 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 38 times [2022-03-20 12:50:11,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:11,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482172814] [2022-03-20 12:50:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:11,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:11,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:11,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:11,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482172814] [2022-03-20 12:50:11,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482172814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:11,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082171682] [2022-03-20 12:50:11,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:11,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:11,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:11,328 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:11,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 12:50:11,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:11,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:11,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 12:50:11,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:11,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:11,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082171682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:11,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:11,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-20 12:50:11,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220174071] [2022-03-20 12:50:11,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220174071] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:11,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:11,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 12:50:11,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992306482] [2022-03-20 12:50:11,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:11,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 12:50:11,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:11,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 12:50:11,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 12:50:11,946 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:12,197 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-03-20 12:50:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 12:50:12,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 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 50 [2022-03-20 12:50:12,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:12,198 INFO L225 Difference]: With dead ends: 60 [2022-03-20 12:50:12,198 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 12:50:12,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 12:50:12,200 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:12,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 39 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:12,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 12:50:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-20 12:50:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 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) [2022-03-20 12:50:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-03-20 12:50:12,218 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2022-03-20 12:50:12,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:12,218 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-03-20 12:50:12,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-03-20 12:50:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 12:50:12,219 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:12,219 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:12,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:12,419 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 [2022-03-20 12:50:12,419 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:12,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 39 times [2022-03-20 12:50:12,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:12,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1914189085] [2022-03-20 12:50:12,421 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:12,421 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:12,421 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 40 times [2022-03-20 12:50:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:12,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104787693] [2022-03-20 12:50:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:12,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:12,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:12,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:12,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104787693] [2022-03-20 12:50:12,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104787693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:12,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34603176] [2022-03-20 12:50:12,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:12,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:12,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:12,636 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:12,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 12:50:12,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:12,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 12:50:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:12,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:13,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34603176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:13,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:13,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-20 12:50:13,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:13,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1914189085] [2022-03-20 12:50:13,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1914189085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:13,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:13,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 12:50:13,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978871996] [2022-03-20 12:50:13,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:13,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 12:50:13,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:13,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 12:50:13,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 12:50:13,334 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:13,602 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-03-20 12:50:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 12:50:13,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 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 52 [2022-03-20 12:50:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:13,604 INFO L225 Difference]: With dead ends: 62 [2022-03-20 12:50:13,604 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 12:50:13,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 12:50:13,606 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:13,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:13,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 12:50:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-20 12:50:13,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2022-03-20 12:50:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-03-20 12:50:13,611 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2022-03-20 12:50:13,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:13,611 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-03-20 12:50:13,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-03-20 12:50:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 12:50:13,612 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:13,612 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:13,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:13,819 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 [2022-03-20 12:50:13,819 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:13,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:13,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 41 times [2022-03-20 12:50:13,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:13,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293543548] [2022-03-20 12:50:13,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:13,821 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:13,821 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 42 times [2022-03-20 12:50:13,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:13,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145346540] [2022-03-20 12:50:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:13,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:14,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:14,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:14,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145346540] [2022-03-20 12:50:14,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145346540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:14,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423806045] [2022-03-20 12:50:14,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:14,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:14,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:14,071 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:14,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 12:50:14,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 12:50:14,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:14,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 12:50:14,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:14,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:15,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423806045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:15,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:15,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-20 12:50:15,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:15,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293543548] [2022-03-20 12:50:15,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293543548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:15,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:15,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 12:50:15,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225025908] [2022-03-20 12:50:15,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:15,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 12:50:15,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:15,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 12:50:15,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 12:50:15,246 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:15,536 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-03-20 12:50:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 12:50:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 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 54 [2022-03-20 12:50:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:15,537 INFO L225 Difference]: With dead ends: 64 [2022-03-20 12:50:15,537 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 12:50:15,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 12:50:15,539 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:15,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 12:50:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-03-20 12:50:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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) [2022-03-20 12:50:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-03-20 12:50:15,544 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2022-03-20 12:50:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:15,544 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-03-20 12:50:15,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-03-20 12:50:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 12:50:15,545 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:15,545 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:15,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 12:50:15,763 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 [2022-03-20 12:50:15,763 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 43 times [2022-03-20 12:50:15,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:15,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [885997457] [2022-03-20 12:50:15,765 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:15,765 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:15,765 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 44 times [2022-03-20 12:50:15,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:15,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517288901] [2022-03-20 12:50:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:15,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:15,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:16,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:16,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517288901] [2022-03-20 12:50:16,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517288901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:16,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345562210] [2022-03-20 12:50:16,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:16,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:16,001 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:16,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 12:50:16,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:16,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 12:50:16,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:16,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:16,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345562210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:16,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:16,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-20 12:50:16,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:16,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [885997457] [2022-03-20 12:50:16,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [885997457] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:16,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:16,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 12:50:16,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368272474] [2022-03-20 12:50:16,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:16,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 12:50:16,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:16,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 12:50:16,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 12:50:16,737 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:17,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:17,047 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-03-20 12:50:17,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 12:50:17,047 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 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 56 [2022-03-20 12:50:17,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:17,047 INFO L225 Difference]: With dead ends: 66 [2022-03-20 12:50:17,048 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 12:50:17,048 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 12:50:17,048 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:17,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 34 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 12:50:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 12:50:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 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) [2022-03-20 12:50:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-03-20 12:50:17,054 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2022-03-20 12:50:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:17,054 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-03-20 12:50:17,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-03-20 12:50:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 12:50:17,055 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:17,055 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:17,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 12:50:17,259 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 [2022-03-20 12:50:17,259 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:17,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 45 times [2022-03-20 12:50:17,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:17,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846946092] [2022-03-20 12:50:17,261 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:17,261 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:17,261 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:17,261 INFO L85 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 46 times [2022-03-20 12:50:17,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:17,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587168702] [2022-03-20 12:50:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:17,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:17,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:17,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:17,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587168702] [2022-03-20 12:50:17,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587168702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:17,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127387220] [2022-03-20 12:50:17,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:17,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:17,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:17,505 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:17,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 12:50:17,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:17,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:17,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 12:50:17,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:17,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:18,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127387220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:18,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:18,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-20 12:50:18,272 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:18,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846946092] [2022-03-20 12:50:18,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846946092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:18,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:18,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 12:50:18,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694705218] [2022-03-20 12:50:18,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:18,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 12:50:18,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 12:50:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 12:50:18,274 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:18,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:18,576 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-03-20 12:50:18,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 12:50:18,577 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 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 58 [2022-03-20 12:50:18,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:18,577 INFO L225 Difference]: With dead ends: 68 [2022-03-20 12:50:18,577 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 12:50:18,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 12:50:18,579 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:18,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 39 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:18,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 12:50:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-03-20 12:50:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 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) [2022-03-20 12:50:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-03-20 12:50:18,585 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2022-03-20 12:50:18,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:18,585 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-03-20 12:50:18,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:18,585 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-03-20 12:50:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 12:50:18,586 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:18,586 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:18,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:18,799 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 [2022-03-20 12:50:18,799 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:18,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 47 times [2022-03-20 12:50:18,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:18,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [619106387] [2022-03-20 12:50:18,801 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:18,801 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:18,801 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:18,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 48 times [2022-03-20 12:50:18,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:18,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375822276] [2022-03-20 12:50:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:18,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:19,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:19,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:19,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375822276] [2022-03-20 12:50:19,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375822276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:19,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764769695] [2022-03-20 12:50:19,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:19,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:19,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:19,070 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:19,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 12:50:19,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 12:50:19,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:19,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 12:50:19,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:20,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:20,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764769695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:20,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:20,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-20 12:50:20,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:20,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [619106387] [2022-03-20 12:50:20,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [619106387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:20,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:20,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 12:50:20,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798232409] [2022-03-20 12:50:20,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:20,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 12:50:20,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 12:50:20,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 12:50:20,665 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:20,986 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-03-20 12:50:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 12:50:20,986 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 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 60 [2022-03-20 12:50:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:20,987 INFO L225 Difference]: With dead ends: 70 [2022-03-20 12:50:20,987 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 12:50:20,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 12:50:20,988 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:20,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 19 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:20,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 12:50:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 12:50:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 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) [2022-03-20 12:50:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-03-20 12:50:20,996 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2022-03-20 12:50:20,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:20,996 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-03-20 12:50:20,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-03-20 12:50:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 12:50:20,996 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:20,997 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:21,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:21,211 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 [2022-03-20 12:50:21,211 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:21,212 INFO L85 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 49 times [2022-03-20 12:50:21,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:21,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1902040698] [2022-03-20 12:50:21,213 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:21,213 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:21,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:21,213 INFO L85 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 50 times [2022-03-20 12:50:21,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:21,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438495946] [2022-03-20 12:50:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:21,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:21,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:21,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:21,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438495946] [2022-03-20 12:50:21,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438495946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:21,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446669701] [2022-03-20 12:50:21,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:21,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:21,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:21,484 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:21,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 12:50:21,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:21,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 12:50:21,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:21,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:22,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446669701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:22,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:22,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-20 12:50:22,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:22,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1902040698] [2022-03-20 12:50:22,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1902040698] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:22,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:22,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 12:50:22,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930821707] [2022-03-20 12:50:22,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:22,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 12:50:22,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:22,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 12:50:22,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 12:50:22,380 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:22,732 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-03-20 12:50:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 12:50:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 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 62 [2022-03-20 12:50:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:22,733 INFO L225 Difference]: With dead ends: 72 [2022-03-20 12:50:22,733 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 12:50:22,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 12:50:22,735 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:22,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 34 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 12:50:22,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-03-20 12:50:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 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) [2022-03-20 12:50:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-03-20 12:50:22,741 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2022-03-20 12:50:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:22,741 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-03-20 12:50:22,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-03-20 12:50:22,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 12:50:22,742 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:22,742 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:22,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:22,942 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 [2022-03-20 12:50:22,943 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:22,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 51 times [2022-03-20 12:50:22,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:22,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1420284326] [2022-03-20 12:50:22,944 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:22,944 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:22,944 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 52 times [2022-03-20 12:50:22,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:22,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804661725] [2022-03-20 12:50:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:22,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:23,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:23,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804661725] [2022-03-20 12:50:23,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804661725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790813804] [2022-03-20 12:50:23,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:23,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:23,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:23,253 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:23,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 12:50:23,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:23,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:23,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 12:50:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:23,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:24,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790813804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:24,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:24,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-03-20 12:50:24,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:24,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1420284326] [2022-03-20 12:50:24,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1420284326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:24,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:24,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 12:50:24,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880698481] [2022-03-20 12:50:24,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:24,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 12:50:24,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:24,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 12:50:24,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 12:50:24,236 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:24,614 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-03-20 12:50:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 12:50:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 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 64 [2022-03-20 12:50:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:24,620 INFO L225 Difference]: With dead ends: 74 [2022-03-20 12:50:24,620 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 12:50:24,621 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 12:50:24,622 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:24,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 12:50:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-03-20 12:50:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 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) [2022-03-20 12:50:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-03-20 12:50:24,629 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2022-03-20 12:50:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:24,629 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-03-20 12:50:24,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-03-20 12:50:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 12:50:24,630 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:24,630 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:24,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:24,830 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 [2022-03-20 12:50:24,831 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:24,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 53 times [2022-03-20 12:50:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:24,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1443044074] [2022-03-20 12:50:24,832 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:24,832 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:24,832 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 54 times [2022-03-20 12:50:24,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:24,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868263842] [2022-03-20 12:50:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:24,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:25,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:25,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:25,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868263842] [2022-03-20 12:50:25,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868263842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:25,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803310276] [2022-03-20 12:50:25,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:25,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:25,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:25,147 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:25,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 12:50:27,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-20 12:50:27,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:27,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 12:50:27,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:27,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:28,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803310276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:28,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:28,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-20 12:50:28,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:28,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1443044074] [2022-03-20 12:50:28,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1443044074] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:28,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:28,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 12:50:28,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743730300] [2022-03-20 12:50:28,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:28,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 12:50:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 12:50:28,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 12:50:28,124 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:28,507 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-03-20 12:50:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 12:50:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 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 66 [2022-03-20 12:50:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:28,507 INFO L225 Difference]: With dead ends: 76 [2022-03-20 12:50:28,508 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 12:50:28,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 12:50:28,509 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:28,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 34 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 12:50:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-20 12:50:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 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) [2022-03-20 12:50:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-03-20 12:50:28,516 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2022-03-20 12:50:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:28,516 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-03-20 12:50:28,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-03-20 12:50:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 12:50:28,517 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:28,517 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:28,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 12:50:28,735 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 [2022-03-20 12:50:28,735 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:28,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:28,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 55 times [2022-03-20 12:50:28,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:28,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1897071276] [2022-03-20 12:50:28,737 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:28,737 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:28,737 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:28,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 56 times [2022-03-20 12:50:28,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:28,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142406627] [2022-03-20 12:50:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:28,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:29,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:29,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:29,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142406627] [2022-03-20 12:50:29,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142406627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:29,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765511612] [2022-03-20 12:50:29,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:29,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:29,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:29,070 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:29,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 12:50:29,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:29,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 12:50:29,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:29,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:30,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765511612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:30,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:30,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-20 12:50:30,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:30,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1897071276] [2022-03-20 12:50:30,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1897071276] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:30,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:30,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 12:50:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536339135] [2022-03-20 12:50:30,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:30,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 12:50:30,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 12:50:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 12:50:30,105 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:30,535 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-03-20 12:50:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 12:50:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 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 68 [2022-03-20 12:50:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:30,536 INFO L225 Difference]: With dead ends: 78 [2022-03-20 12:50:30,536 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 12:50:30,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 12:50:30,537 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:30,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 12:50:30,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 12:50:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 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) [2022-03-20 12:50:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-03-20 12:50:30,545 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2022-03-20 12:50:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:30,545 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-03-20 12:50:30,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:30,545 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-03-20 12:50:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 12:50:30,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:30,546 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:30,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:30,759 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 [2022-03-20 12:50:30,759 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 57 times [2022-03-20 12:50:30,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:30,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [724560153] [2022-03-20 12:50:30,761 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:30,761 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:30,761 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:30,761 INFO L85 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 58 times [2022-03-20 12:50:30,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:30,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970285766] [2022-03-20 12:50:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:30,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:31,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:31,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:31,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970285766] [2022-03-20 12:50:31,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970285766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:31,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500460273] [2022-03-20 12:50:31,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:31,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:31,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:31,098 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:31,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 12:50:31,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:31,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 12:50:31,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:31,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:32,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500460273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:32,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:32,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-20 12:50:32,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:32,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [724560153] [2022-03-20 12:50:32,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [724560153] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:32,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:32,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 12:50:32,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12057334] [2022-03-20 12:50:32,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:32,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 12:50:32,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 12:50:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 12:50:32,205 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:32,648 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-03-20 12:50:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 12:50:32,649 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 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 70 [2022-03-20 12:50:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:32,649 INFO L225 Difference]: With dead ends: 80 [2022-03-20 12:50:32,649 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 12:50:32,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 12:50:32,651 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:32,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 12:50:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-03-20 12:50:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 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) [2022-03-20 12:50:32,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-03-20 12:50:32,658 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2022-03-20 12:50:32,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:32,659 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-03-20 12:50:32,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-03-20 12:50:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 12:50:32,659 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:32,659 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:32,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:32,867 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 [2022-03-20 12:50:32,867 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 59 times [2022-03-20 12:50:32,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:32,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005764425] [2022-03-20 12:50:32,869 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:32,869 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:32,869 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 60 times [2022-03-20 12:50:32,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:32,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120047664] [2022-03-20 12:50:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:32,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:33,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:33,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120047664] [2022-03-20 12:50:33,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120047664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924454290] [2022-03-20 12:50:33,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:33,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:33,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:33,222 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:33,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 12:50:36,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 12:50:36,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:36,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 12:50:36,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:36,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:37,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924454290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:37,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:37,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-20 12:50:37,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:37,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005764425] [2022-03-20 12:50:37,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005764425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:37,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:37,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 12:50:37,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102878005] [2022-03-20 12:50:37,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:37,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 12:50:37,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:37,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 12:50:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 12:50:37,398 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:37,874 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-03-20 12:50:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 12:50:37,875 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 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 72 [2022-03-20 12:50:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:37,875 INFO L225 Difference]: With dead ends: 82 [2022-03-20 12:50:37,875 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 12:50:37,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 12:50:37,877 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:37,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 29 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 12:50:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-03-20 12:50:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 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) [2022-03-20 12:50:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-03-20 12:50:37,885 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2022-03-20 12:50:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:37,885 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-03-20 12:50:37,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-03-20 12:50:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 12:50:37,886 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:37,886 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:37,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:38,091 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 [2022-03-20 12:50:38,091 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:38,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:38,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 61 times [2022-03-20 12:50:38,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:38,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [53576957] [2022-03-20 12:50:38,093 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:38,093 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:38,093 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:38,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 62 times [2022-03-20 12:50:38,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:38,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040992816] [2022-03-20 12:50:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:38,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:38,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:38,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:38,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040992816] [2022-03-20 12:50:38,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040992816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:38,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839192074] [2022-03-20 12:50:38,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:38,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:38,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:38,459 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:38,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 12:50:38,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:38,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:38,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 12:50:38,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:38,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:39,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839192074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:39,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:39,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-20 12:50:39,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:39,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [53576957] [2022-03-20 12:50:39,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [53576957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:39,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:39,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 12:50:39,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613261887] [2022-03-20 12:50:39,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:39,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 12:50:39,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:39,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 12:50:39,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 12:50:39,668 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:40,140 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-03-20 12:50:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 12:50:40,140 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 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 74 [2022-03-20 12:50:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:40,141 INFO L225 Difference]: With dead ends: 84 [2022-03-20 12:50:40,141 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 12:50:40,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 12:50:40,143 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:40,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 12:50:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-03-20 12:50:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 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) [2022-03-20 12:50:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-03-20 12:50:40,152 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2022-03-20 12:50:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:40,152 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-03-20 12:50:40,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-03-20 12:50:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 12:50:40,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:40,152 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:40,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:40,353 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 [2022-03-20 12:50:40,353 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 63 times [2022-03-20 12:50:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:40,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1247913620] [2022-03-20 12:50:40,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:40,355 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:40,355 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 64 times [2022-03-20 12:50:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:40,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146259909] [2022-03-20 12:50:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:40,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:40,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:40,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:40,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146259909] [2022-03-20 12:50:40,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146259909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:40,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379456029] [2022-03-20 12:50:40,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:40,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:40,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:40,732 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:40,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 12:50:40,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:40,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:40,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 12:50:40,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:40,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:41,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379456029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:41,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:41,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-20 12:50:41,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:41,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1247913620] [2022-03-20 12:50:41,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1247913620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:41,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:41,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 12:50:41,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272088070] [2022-03-20 12:50:41,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:41,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 12:50:41,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 12:50:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 12:50:41,955 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:42,436 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-03-20 12:50:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 12:50:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 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 76 [2022-03-20 12:50:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:42,436 INFO L225 Difference]: With dead ends: 86 [2022-03-20 12:50:42,437 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 12:50:42,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4626, Invalid=5880, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 12:50:42,438 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:42,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 49 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 12:50:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-03-20 12:50:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 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) [2022-03-20 12:50:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-03-20 12:50:42,447 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2022-03-20 12:50:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:42,447 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-03-20 12:50:42,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-03-20 12:50:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 12:50:42,447 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:42,447 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:42,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-20 12:50:42,657 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 [2022-03-20 12:50:42,657 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:42,657 INFO L85 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 65 times [2022-03-20 12:50:42,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:42,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467970694] [2022-03-20 12:50:42,659 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:42,659 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:42,659 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:42,659 INFO L85 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 66 times [2022-03-20 12:50:42,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:42,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002061721] [2022-03-20 12:50:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:42,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:43,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:43,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002061721] [2022-03-20 12:50:43,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002061721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:43,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518153007] [2022-03-20 12:50:43,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:43,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:43,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:43,070 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:43,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 12:50:48,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-20 12:50:48,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:48,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 12:50:48,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:48,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:49,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518153007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:49,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:49,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-20 12:50:49,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:49,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467970694] [2022-03-20 12:50:49,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467970694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:49,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:49,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 12:50:49,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784357904] [2022-03-20 12:50:49,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:49,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 12:50:49,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:49,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 12:50:49,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 12:50:49,328 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:49,853 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-03-20 12:50:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 12:50:49,854 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 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 78 [2022-03-20 12:50:49,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:49,854 INFO L225 Difference]: With dead ends: 88 [2022-03-20 12:50:49,854 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 12:50:49,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 12:50:49,855 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:49,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 34 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 12:50:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-03-20 12:50:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 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) [2022-03-20 12:50:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-03-20 12:50:49,864 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2022-03-20 12:50:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:49,865 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-03-20 12:50:49,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-03-20 12:50:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 12:50:49,865 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:49,865 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:49,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:50,076 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 [2022-03-20 12:50:50,076 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:50,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:50,077 INFO L85 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 67 times [2022-03-20 12:50:50,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:50,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [162324667] [2022-03-20 12:50:50,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:50,078 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:50,078 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:50,078 INFO L85 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 68 times [2022-03-20 12:50:50,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:50,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118174070] [2022-03-20 12:50:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:50,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:50,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:50,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:50,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118174070] [2022-03-20 12:50:50,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118174070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:50,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752759914] [2022-03-20 12:50:50,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:50,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:50,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:50,493 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:50,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 12:50:50,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:50,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:50,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 12:50:50,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:50,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:51,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752759914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:51,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:51,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-20 12:50:51,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [162324667] [2022-03-20 12:50:51,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [162324667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:51,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:51,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 12:50:51,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655471992] [2022-03-20 12:50:51,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:51,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 12:50:51,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 12:50:51,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 12:50:51,849 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:52,382 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-03-20 12:50:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 12:50:52,383 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 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 80 [2022-03-20 12:50:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:52,383 INFO L225 Difference]: With dead ends: 90 [2022-03-20 12:50:52,383 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 12:50:52,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 12:50:52,385 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:52,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 34 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 12:50:52,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-03-20 12:50:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 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) [2022-03-20 12:50:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-03-20 12:50:52,394 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2022-03-20 12:50:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:52,394 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-03-20 12:50:52,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-03-20 12:50:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 12:50:52,395 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:52,395 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:52,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:52,595 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 [2022-03-20 12:50:52,595 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:52,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 69 times [2022-03-20 12:50:52,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:52,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1133232038] [2022-03-20 12:50:52,597 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:52,597 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:52,597 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:52,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 70 times [2022-03-20 12:50:52,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:52,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378352192] [2022-03-20 12:50:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:52,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:53,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:53,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:53,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378352192] [2022-03-20 12:50:53,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378352192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:53,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527260908] [2022-03-20 12:50:53,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:53,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:53,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:53,030 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:53,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 12:50:53,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:53,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:53,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 12:50:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:53,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:54,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527260908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:54,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:54,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-03-20 12:50:54,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1133232038] [2022-03-20 12:50:54,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1133232038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:54,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:54,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 12:50:54,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181219687] [2022-03-20 12:50:54,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:54,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 12:50:54,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:54,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 12:50:54,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 12:50:54,446 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:55,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:55,016 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-03-20 12:50:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 12:50:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 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 82 [2022-03-20 12:50:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:55,017 INFO L225 Difference]: With dead ends: 92 [2022-03-20 12:50:55,017 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 12:50:55,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5478, Invalid=6954, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 12:50:55,019 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:55,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 34 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:50:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 12:50:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-03-20 12:50:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 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) [2022-03-20 12:50:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-03-20 12:50:55,037 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2022-03-20 12:50:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:55,037 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-03-20 12:50:55,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:50:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-03-20 12:50:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 12:50:55,037 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:55,037 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:55,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:55,247 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 [2022-03-20 12:50:55,247 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 71 times [2022-03-20 12:50:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:55,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [413422672] [2022-03-20 12:50:55,249 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:55,249 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:55,249 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:55,249 INFO L85 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 72 times [2022-03-20 12:50:55,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:55,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946874574] [2022-03-20 12:50:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:55,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:55,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:50:55,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:55,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946874574] [2022-03-20 12:50:55,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946874574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:55,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369414968] [2022-03-20 12:50:55,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:55,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:55,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:55,705 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:55,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 12:51:05,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-20 12:51:05,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:05,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 12:51:05,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:06,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:07,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369414968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:07,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:07,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-20 12:51:07,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:07,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [413422672] [2022-03-20 12:51:07,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [413422672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:07,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:07,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 12:51:07,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994650885] [2022-03-20 12:51:07,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:07,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 12:51:07,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:07,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 12:51:07,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 12:51:07,364 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:07,962 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-03-20 12:51:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 12:51:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 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 84 [2022-03-20 12:51:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:07,963 INFO L225 Difference]: With dead ends: 94 [2022-03-20 12:51:07,963 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 12:51:07,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 12:51:07,965 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:07,965 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 34 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 12:51:07,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-03-20 12:51:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 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) [2022-03-20 12:51:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-03-20 12:51:07,976 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2022-03-20 12:51:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:07,976 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-03-20 12:51:07,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-03-20 12:51:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 12:51:07,976 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:07,977 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:08,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 12:51:08,185 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 [2022-03-20 12:51:08,185 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:08,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 73 times [2022-03-20 12:51:08,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:08,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1026644065] [2022-03-20 12:51:08,187 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:08,187 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:08,187 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 74 times [2022-03-20 12:51:08,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:08,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386150371] [2022-03-20 12:51:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:08,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:08,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:08,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386150371] [2022-03-20 12:51:08,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386150371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131009040] [2022-03-20 12:51:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:51:08,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:08,668 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:08,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 12:51:08,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:51:08,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:08,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 12:51:08,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:09,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:10,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131009040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:10,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:10,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-20 12:51:10,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:10,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1026644065] [2022-03-20 12:51:10,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1026644065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:10,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:10,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 12:51:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689418273] [2022-03-20 12:51:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:10,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 12:51:10,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 12:51:10,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 12:51:10,376 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:11,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:11,023 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-03-20 12:51:11,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 12:51:11,023 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 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 86 [2022-03-20 12:51:11,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:11,023 INFO L225 Difference]: With dead ends: 96 [2022-03-20 12:51:11,024 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 12:51:11,025 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 12:51:11,026 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:11,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 12:51:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-03-20 12:51:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 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) [2022-03-20 12:51:11,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-03-20 12:51:11,051 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2022-03-20 12:51:11,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:11,051 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-03-20 12:51:11,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-03-20 12:51:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 12:51:11,051 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:11,051 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:11,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-20 12:51:11,252 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 [2022-03-20 12:51:11,252 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:11,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:11,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 75 times [2022-03-20 12:51:11,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:11,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1834101459] [2022-03-20 12:51:11,254 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:11,254 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:11,254 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:11,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 76 times [2022-03-20 12:51:11,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:11,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100310678] [2022-03-20 12:51:11,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:11,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:11,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:11,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100310678] [2022-03-20 12:51:11,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100310678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863494812] [2022-03-20 12:51:11,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:51:11,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:11,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:11,778 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:11,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 12:51:11,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:51:11,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:11,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 12:51:11,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:12,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:13,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863494812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:13,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:13,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-03-20 12:51:13,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:13,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1834101459] [2022-03-20 12:51:13,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1834101459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:13,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:13,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 12:51:13,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760987331] [2022-03-20 12:51:13,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:13,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 12:51:13,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:13,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 12:51:13,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 12:51:13,478 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:14,140 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-03-20 12:51:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 12:51:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 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 88 [2022-03-20 12:51:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:14,141 INFO L225 Difference]: With dead ends: 98 [2022-03-20 12:51:14,141 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 12:51:14,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6402, Invalid=8118, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 12:51:14,143 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:14,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 34 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:14,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 12:51:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-03-20 12:51:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 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) [2022-03-20 12:51:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-03-20 12:51:14,154 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2022-03-20 12:51:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:14,155 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-03-20 12:51:14,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-03-20 12:51:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 12:51:14,155 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:14,155 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:14,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-20 12:51:14,356 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 [2022-03-20 12:51:14,356 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:14,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:14,356 INFO L85 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 77 times [2022-03-20 12:51:14,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:14,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [565326663] [2022-03-20 12:51:14,358 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:14,358 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:14,358 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:14,358 INFO L85 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 78 times [2022-03-20 12:51:14,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:14,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826916686] [2022-03-20 12:51:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:14,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:14,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:14,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:14,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826916686] [2022-03-20 12:51:14,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826916686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:14,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076928166] [2022-03-20 12:51:14,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:51:14,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:14,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:14,893 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:14,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 12:51:24,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-20 12:51:24,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:24,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 12:51:24,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:24,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:25,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076928166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:25,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:25,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-20 12:51:25,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:25,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [565326663] [2022-03-20 12:51:25,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [565326663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:25,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:25,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 12:51:25,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677315629] [2022-03-20 12:51:25,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:25,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 12:51:25,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:25,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 12:51:25,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 12:51:25,569 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:26,269 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-03-20 12:51:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 12:51:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 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 90 [2022-03-20 12:51:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:26,270 INFO L225 Difference]: With dead ends: 100 [2022-03-20 12:51:26,270 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 12:51:26,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 12:51:26,271 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:26,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 54 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 12:51:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-03-20 12:51:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 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) [2022-03-20 12:51:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-03-20 12:51:26,283 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2022-03-20 12:51:26,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:26,283 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-03-20 12:51:26,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:26,283 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-03-20 12:51:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 12:51:26,284 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:26,284 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:26,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-20 12:51:26,487 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 [2022-03-20 12:51:26,487 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 79 times [2022-03-20 12:51:26,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:26,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204669319] [2022-03-20 12:51:26,489 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:26,489 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:26,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:26,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 80 times [2022-03-20 12:51:26,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:26,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137666408] [2022-03-20 12:51:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:26,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:27,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:27,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:27,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137666408] [2022-03-20 12:51:27,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137666408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:27,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404286878] [2022-03-20 12:51:27,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:51:27,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:27,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:27,063 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:27,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 12:51:27,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:51:27,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:27,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 12:51:27,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:27,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:28,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404286878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:28,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:28,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-20 12:51:28,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:28,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204669319] [2022-03-20 12:51:28,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204669319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:28,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:28,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 12:51:28,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737348728] [2022-03-20 12:51:28,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:28,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 12:51:28,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 12:51:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 12:51:28,890 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:29,650 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-03-20 12:51:29,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 12:51:29,651 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 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 92 [2022-03-20 12:51:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:29,651 INFO L225 Difference]: With dead ends: 102 [2022-03-20 12:51:29,651 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 12:51:29,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 12:51:29,653 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:29,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 44 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 12:51:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-03-20 12:51:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 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) [2022-03-20 12:51:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-03-20 12:51:29,674 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2022-03-20 12:51:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:29,675 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-03-20 12:51:29,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-03-20 12:51:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 12:51:29,675 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:29,675 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:29,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 12:51:29,876 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 [2022-03-20 12:51:29,876 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 81 times [2022-03-20 12:51:29,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:29,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [350958626] [2022-03-20 12:51:29,878 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:29,878 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:29,878 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:29,878 INFO L85 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 82 times [2022-03-20 12:51:29,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:29,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969157243] [2022-03-20 12:51:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:29,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:30,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:30,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:30,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969157243] [2022-03-20 12:51:30,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969157243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:30,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344779794] [2022-03-20 12:51:30,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:51:30,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:30,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:30,460 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:30,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 12:51:30,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:51:30,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:30,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 12:51:30,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:30,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:32,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344779794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:32,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:32,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-03-20 12:51:32,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:32,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [350958626] [2022-03-20 12:51:32,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [350958626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:32,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:32,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 12:51:32,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940972033] [2022-03-20 12:51:32,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:32,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 12:51:32,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:32,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 12:51:32,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 12:51:32,358 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:33,112 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-03-20 12:51:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 12:51:33,112 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 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 94 [2022-03-20 12:51:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:33,113 INFO L225 Difference]: With dead ends: 104 [2022-03-20 12:51:33,113 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 12:51:33,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7398, Invalid=9372, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 12:51:33,115 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:33,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 34 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 12:51:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-03-20 12:51:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 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) [2022-03-20 12:51:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-03-20 12:51:33,128 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2022-03-20 12:51:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:33,128 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-03-20 12:51:33,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-03-20 12:51:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 12:51:33,128 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:33,128 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:33,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-20 12:51:33,331 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 [2022-03-20 12:51:33,331 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:33,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 83 times [2022-03-20 12:51:33,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:33,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1721210918] [2022-03-20 12:51:33,333 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:33,333 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:33,333 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:33,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 84 times [2022-03-20 12:51:33,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:33,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768175188] [2022-03-20 12:51:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:33,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:33,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:33,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:33,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768175188] [2022-03-20 12:51:33,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768175188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:33,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788532342] [2022-03-20 12:51:33,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:51:33,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:33,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:33,939 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:33,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 12:51:46,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-20 12:51:46,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:46,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 12:51:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:47,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:48,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788532342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:48,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:48,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-20 12:51:48,647 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:48,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1721210918] [2022-03-20 12:51:48,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1721210918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:48,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:48,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 12:51:48,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085569572] [2022-03-20 12:51:48,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:48,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 12:51:48,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:48,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 12:51:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 12:51:48,649 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:49,446 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-03-20 12:51:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 12:51:49,446 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 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 96 [2022-03-20 12:51:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:49,447 INFO L225 Difference]: With dead ends: 106 [2022-03-20 12:51:49,447 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 12:51:49,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 12:51:49,449 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:49,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:49,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 12:51:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-20 12:51:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 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) [2022-03-20 12:51:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-03-20 12:51:49,462 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2022-03-20 12:51:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:49,463 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-03-20 12:51:49,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-03-20 12:51:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 12:51:49,463 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:49,463 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:49,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 12:51:49,679 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 [2022-03-20 12:51:49,679 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:49,680 INFO L85 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 85 times [2022-03-20 12:51:49,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:49,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [273848026] [2022-03-20 12:51:49,681 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:49,681 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:49,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 86 times [2022-03-20 12:51:49,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:49,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785203168] [2022-03-20 12:51:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:49,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:50,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:50,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:50,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785203168] [2022-03-20 12:51:50,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785203168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:50,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450276727] [2022-03-20 12:51:50,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:51:50,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:50,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:50,333 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:50,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 12:51:50,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:51:50,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 12:51:50,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:50,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:52,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450276727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:52,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:52,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-20 12:51:52,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:52,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [273848026] [2022-03-20 12:51:52,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [273848026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:52,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:52,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 12:51:52,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715098832] [2022-03-20 12:51:52,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:52,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 12:51:52,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:52,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 12:51:52,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 12:51:52,441 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:53,266 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-03-20 12:51:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 12:51:53,266 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 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 98 [2022-03-20 12:51:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:53,267 INFO L225 Difference]: With dead ends: 108 [2022-03-20 12:51:53,267 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 12:51:53,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 12:51:53,270 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:53,270 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 44 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 12:51:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-03-20 12:51:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 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) [2022-03-20 12:51:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-03-20 12:51:53,284 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2022-03-20 12:51:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:53,284 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-03-20 12:51:53,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-03-20 12:51:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 12:51:53,285 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:53,285 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:53,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-20 12:51:53,486 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 [2022-03-20 12:51:53,486 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:53,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:53,486 INFO L85 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 87 times [2022-03-20 12:51:53,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:53,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1893243374] [2022-03-20 12:51:53,488 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:53,488 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:53,488 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 88 times [2022-03-20 12:51:53,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:53,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278069210] [2022-03-20 12:51:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:53,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:54,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:54,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:54,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278069210] [2022-03-20 12:51:54,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278069210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:54,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765120826] [2022-03-20 12:51:54,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:51:54,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:54,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:54,165 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:54,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 12:51:54,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:51:54,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 12:51:54,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:54,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:56,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765120826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:56,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:56,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-03-20 12:51:56,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:56,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1893243374] [2022-03-20 12:51:56,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1893243374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:56,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:56,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 12:51:56,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030027936] [2022-03-20 12:51:56,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:56,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 12:51:56,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 12:51:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 12:51:56,338 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:57,198 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-03-20 12:51:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 12:51:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 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 100 [2022-03-20 12:51:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:57,199 INFO L225 Difference]: With dead ends: 110 [2022-03-20 12:51:57,199 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 12:51:57,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8466, Invalid=10716, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 12:51:57,201 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:57,202 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 39 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:57,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 12:51:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-03-20 12:51:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 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) [2022-03-20 12:51:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-03-20 12:51:57,216 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2022-03-20 12:51:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:57,216 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-03-20 12:51:57,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-03-20 12:51:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:51:57,217 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:57,217 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:57,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 12:51:57,431 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 [2022-03-20 12:51:57,431 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:57,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:57,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 89 times [2022-03-20 12:51:57,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:57,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179449759] [2022-03-20 12:51:57,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:57,433 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:57,433 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:57,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 90 times [2022-03-20 12:51:57,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:57,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146057253] [2022-03-20 12:51:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:57,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:58,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:51:58,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:58,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146057253] [2022-03-20 12:51:58,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146057253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:58,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481717052] [2022-03-20 12:51:58,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:51:58,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:58,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:58,130 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:58,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 12:52:20,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-20 12:52:20,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:52:20,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 12:52:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:52:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:52:20,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:52:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:52:22,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481717052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:52:22,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:52:22,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-20 12:52:22,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:52:22,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [179449759] [2022-03-20 12:52:22,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [179449759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:52:22,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:52:22,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 12:52:22,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435193610] [2022-03-20 12:52:22,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:52:22,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 12:52:22,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 12:52:22,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 12:52:22,735 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:52:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:52:23,607 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-03-20 12:52:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 12:52:23,607 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 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 102 [2022-03-20 12:52:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:52:23,610 INFO L225 Difference]: With dead ends: 112 [2022-03-20 12:52:23,610 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 12:52:23,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 12:52:23,614 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:52:23,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 44 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:52:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 12:52:23,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-03-20 12:52:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 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) [2022-03-20 12:52:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-03-20 12:52:23,629 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2022-03-20 12:52:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:52:23,629 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-03-20 12:52:23,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:52:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-03-20 12:52:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 12:52:23,630 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:52:23,630 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:52:23,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 12:52:23,843 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 [2022-03-20 12:52:23,843 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:52:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:52:23,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 91 times [2022-03-20 12:52:23,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:23,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1338936168] [2022-03-20 12:52:23,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:52:23,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:52:23,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:52:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 92 times [2022-03-20 12:52:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:52:23,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427246513] [2022-03-20 12:52:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:52:23,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:52:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:24,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:52:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:52:24,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:52:24,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427246513] [2022-03-20 12:52:24,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427246513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:52:24,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374015368] [2022-03-20 12:52:24,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:52:24,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:52:24,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:52:24,596 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:52:24,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 12:52:24,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:52:24,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:52:24,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 12:52:24,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:52:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:52:24,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:52:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:52:26,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374015368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:52:26,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:52:26,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-20 12:52:26,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:52:26,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1338936168] [2022-03-20 12:52:26,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1338936168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:52:26,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:52:26,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 12:52:26,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078658878] [2022-03-20 12:52:26,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:52:26,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 12:52:26,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:26,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 12:52:26,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 12:52:26,910 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:52:27,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:52:27,811 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-03-20 12:52:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 12:52:27,812 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 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 104 [2022-03-20 12:52:27,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:52:27,812 INFO L225 Difference]: With dead ends: 114 [2022-03-20 12:52:27,812 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 12:52:27,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 12:52:27,815 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:52:27,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 39 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:52:27,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 12:52:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-03-20 12:52:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 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) [2022-03-20 12:52:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-03-20 12:52:27,837 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2022-03-20 12:52:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:52:27,837 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-03-20 12:52:27,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:52:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-03-20 12:52:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 12:52:27,837 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:52:27,837 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:52:27,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-20 12:52:28,038 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 [2022-03-20 12:52:28,038 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:52:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:52:28,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 93 times [2022-03-20 12:52:28,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:28,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [459201482] [2022-03-20 12:52:28,039 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:52:28,039 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:52:28,039 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:52:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 94 times [2022-03-20 12:52:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:52:28,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820085753] [2022-03-20 12:52:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:52:28,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:52:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:28,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:52:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:52:28,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:52:28,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820085753] [2022-03-20 12:52:28,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820085753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:52:28,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878987240] [2022-03-20 12:52:28,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:52:28,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:52:28,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:52:28,786 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:52:28,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 12:52:29,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:52:29,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:52:29,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 12:52:29,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:52:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:52:29,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:52:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:52:31,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878987240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:52:31,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:52:31,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-03-20 12:52:31,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:52:31,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [459201482] [2022-03-20 12:52:31,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [459201482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:52:31,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:52:31,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 12:52:31,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634729324] [2022-03-20 12:52:31,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:52:31,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 12:52:31,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:31,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 12:52:31,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 12:52:31,178 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:52:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:52:32,112 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-03-20 12:52:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 12:52:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 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 106 [2022-03-20 12:52:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:52:32,113 INFO L225 Difference]: With dead ends: 116 [2022-03-20 12:52:32,113 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 12:52:32,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9606, Invalid=12150, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 12:52:32,114 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:52:32,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 24 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:52:32,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 12:52:32,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-03-20 12:52:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 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) [2022-03-20 12:52:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-03-20 12:52:32,133 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2022-03-20 12:52:32,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:52:32,133 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-03-20 12:52:32,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:52:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-03-20 12:52:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 12:52:32,134 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:52:32,134 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:52:32,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 12:52:32,345 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 [2022-03-20 12:52:32,345 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:52:32,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:52:32,346 INFO L85 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 95 times [2022-03-20 12:52:32,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:32,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [593768135] [2022-03-20 12:52:32,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:52:32,347 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:52:32,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:52:32,347 INFO L85 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 96 times [2022-03-20 12:52:32,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:52:32,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501639327] [2022-03-20 12:52:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:52:32,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:52:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:33,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:52:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:52:33,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:52:33,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501639327] [2022-03-20 12:52:33,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501639327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:52:33,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143260683] [2022-03-20 12:52:33,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:52:33,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:52:33,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:52:33,095 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:52:33,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 12:53:05,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-03-20 12:53:05,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:05,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 12:53:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:53:06,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:53:08,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143260683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:53:08,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:53:08,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-20 12:53:08,070 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:53:08,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [593768135] [2022-03-20 12:53:08,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [593768135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:53:08,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:53:08,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 12:53:08,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361894458] [2022-03-20 12:53:08,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:53:08,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 12:53:08,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:08,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 12:53:08,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 12:53:08,073 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:09,124 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-03-20 12:53:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 12:53:09,124 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 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 108 [2022-03-20 12:53:09,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:09,125 INFO L225 Difference]: With dead ends: 118 [2022-03-20 12:53:09,125 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 12:53:09,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 12:53:09,127 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:53:09,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 39 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:53:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 12:53:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-03-20 12:53:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 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) [2022-03-20 12:53:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2022-03-20 12:53:09,144 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2022-03-20 12:53:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:09,144 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2022-03-20 12:53:09,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2022-03-20 12:53:09,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 12:53:09,145 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:09,145 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:53:09,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-20 12:53:09,366 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 [2022-03-20 12:53:09,366 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:09,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:09,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 97 times [2022-03-20 12:53:09,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:09,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1142649729] [2022-03-20 12:53:09,368 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:09,368 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:09,368 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:09,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 98 times [2022-03-20 12:53:09,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:09,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027998822] [2022-03-20 12:53:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:09,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:10,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:53:10,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027998822] [2022-03-20 12:53:10,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027998822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:10,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969189144] [2022-03-20 12:53:10,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:53:10,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:10,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:10,175 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:53:10,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 12:53:10,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:53:10,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:10,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 12:53:10,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:53:10,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:53:12,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969189144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:53:12,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:53:12,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-20 12:53:12,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:53:12,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1142649729] [2022-03-20 12:53:12,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1142649729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:53:12,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:53:12,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 12:53:12,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108694075] [2022-03-20 12:53:12,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:53:12,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 12:53:12,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:12,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 12:53:12,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 12:53:12,770 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:13,812 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-03-20 12:53:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 12:53:13,812 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 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 110 [2022-03-20 12:53:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:13,813 INFO L225 Difference]: With dead ends: 120 [2022-03-20 12:53:13,813 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 12:53:13,815 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 12:53:13,816 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:53:13,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 34 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:53:13,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 12:53:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2022-03-20 12:53:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 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) [2022-03-20 12:53:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-03-20 12:53:13,840 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2022-03-20 12:53:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:13,840 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-03-20 12:53:13,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-03-20 12:53:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-20 12:53:13,841 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:13,841 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:53:13,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 12:53:14,056 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 [2022-03-20 12:53:14,057 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:14,057 INFO L85 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 99 times [2022-03-20 12:53:14,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:14,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1445678908] [2022-03-20 12:53:14,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:14,058 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:14,058 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:14,058 INFO L85 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 100 times [2022-03-20 12:53:14,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:14,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482941638] [2022-03-20 12:53:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:14,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:14,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:53:14,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:14,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482941638] [2022-03-20 12:53:14,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482941638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:14,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097554371] [2022-03-20 12:53:14,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:53:14,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:14,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:14,867 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:53:14,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 12:53:15,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:53:15,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:15,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 12:53:15,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:53:15,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:53:17,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097554371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:53:17,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:53:17,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-03-20 12:53:17,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:53:17,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1445678908] [2022-03-20 12:53:17,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1445678908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:53:17,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:53:17,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 12:53:17,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701161359] [2022-03-20 12:53:17,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:53:17,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 12:53:17,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:17,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 12:53:17,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 12:53:17,488 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:18,492 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-03-20 12:53:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 12:53:18,493 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 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 112 [2022-03-20 12:53:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:18,493 INFO L225 Difference]: With dead ends: 122 [2022-03-20 12:53:18,493 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 12:53:18,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10818, Invalid=13674, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 12:53:18,495 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:53:18,495 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 34 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:53:18,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 12:53:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-03-20 12:53:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 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) [2022-03-20 12:53:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2022-03-20 12:53:18,512 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2022-03-20 12:53:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:18,512 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2022-03-20 12:53:18,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2022-03-20 12:53:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 12:53:18,513 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:18,513 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:53:18,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-20 12:53:18,713 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 [2022-03-20 12:53:18,713 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:18,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:18,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 101 times [2022-03-20 12:53:18,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:18,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [351878734] [2022-03-20 12:53:18,715 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:18,715 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:18,715 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:18,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 102 times [2022-03-20 12:53:18,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:18,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688716369] [2022-03-20 12:53:18,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:18,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:19,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:53:19,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:19,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688716369] [2022-03-20 12:53:19,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688716369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:19,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356743001] [2022-03-20 12:53:19,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:53:19,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:19,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:19,601 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:53:19,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 12:54:09,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-03-20 12:54:10,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:54:10,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 12:54:10,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:54:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:54:10,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:54:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:54:12,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356743001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:54:12,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:54:12,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-20 12:54:12,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:54:12,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [351878734] [2022-03-20 12:54:12,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [351878734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:54:12,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:54:12,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 12:54:12,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925259041] [2022-03-20 12:54:12,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:54:12,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 12:54:12,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:12,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 12:54:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 12:54:12,549 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:54:13,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:54:13,643 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-03-20 12:54:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 12:54:13,644 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 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 114 [2022-03-20 12:54:13,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:54:13,644 INFO L225 Difference]: With dead ends: 124 [2022-03-20 12:54:13,644 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 12:54:13,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 12:54:13,646 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:54:13,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 44 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:54:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 12:54:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-03-20 12:54:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 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) [2022-03-20 12:54:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-03-20 12:54:13,664 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2022-03-20 12:54:13,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:54:13,664 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-03-20 12:54:13,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:54:13,664 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-03-20 12:54:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 12:54:13,665 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:54:13,665 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:54:13,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-20 12:54:13,865 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 [2022-03-20 12:54:13,865 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:54:13,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:54:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 103 times [2022-03-20 12:54:13,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:13,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [48594676] [2022-03-20 12:54:13,867 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:54:13,867 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:54:13,867 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:54:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 104 times [2022-03-20 12:54:13,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:54:13,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300538303] [2022-03-20 12:54:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:54:13,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:54:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:14,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:54:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:54:14,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:54:14,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300538303] [2022-03-20 12:54:14,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300538303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:54:14,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509791130] [2022-03-20 12:54:14,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:54:14,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:54:14,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:54:14,737 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:54:14,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 12:54:15,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:54:15,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:54:15,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 12:54:15,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:54:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:54:15,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:54:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:54:17,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509791130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:54:17,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:54:17,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-20 12:54:17,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:54:17,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [48594676] [2022-03-20 12:54:17,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [48594676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:54:17,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:54:17,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 12:54:17,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018136781] [2022-03-20 12:54:17,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:54:17,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 12:54:17,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:17,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 12:54:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 12:54:17,621 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:54:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:54:18,745 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-03-20 12:54:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 12:54:18,745 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 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 116 [2022-03-20 12:54:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:54:18,746 INFO L225 Difference]: With dead ends: 126 [2022-03-20 12:54:18,746 INFO L226 Difference]: Without dead ends: 120 [2022-03-20 12:54:18,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 12:54:18,748 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:54:18,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 44 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:54:18,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-20 12:54:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-03-20 12:54:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 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) [2022-03-20 12:54:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-03-20 12:54:18,768 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2022-03-20 12:54:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:54:18,768 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-03-20 12:54:18,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:54:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-03-20 12:54:18,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 12:54:18,768 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:54:18,768 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:54:18,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-20 12:54:18,975 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 [2022-03-20 12:54:18,975 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:54:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:54:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 105 times [2022-03-20 12:54:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:18,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1318232992] [2022-03-20 12:54:18,977 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:54:18,977 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:54:18,977 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:54:18,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 106 times [2022-03-20 12:54:18,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:54:18,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912113129] [2022-03-20 12:54:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:54:18,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:54:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:19,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:54:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:54:19,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:54:19,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912113129] [2022-03-20 12:54:19,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912113129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:54:19,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275697781] [2022-03-20 12:54:19,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:54:19,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:54:19,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:54:19,884 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:54:19,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 12:54:20,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:54:20,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:54:20,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 12:54:20,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:54:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:54:20,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:54:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:54:22,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275697781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:54:22,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:54:22,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-03-20 12:54:22,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:54:22,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1318232992] [2022-03-20 12:54:22,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1318232992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:54:22,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:54:22,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 12:54:22,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400859422] [2022-03-20 12:54:22,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:54:22,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 12:54:22,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:22,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 12:54:22,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 12:54:22,905 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:54:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:54:24,069 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-03-20 12:54:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 12:54:24,069 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 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 118 [2022-03-20 12:54:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:54:24,070 INFO L225 Difference]: With dead ends: 128 [2022-03-20 12:54:24,070 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 12:54:24,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12102, Invalid=15288, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 12:54:24,072 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:54:24,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 29 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:54:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 12:54:24,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-03-20 12:54:24,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 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) [2022-03-20 12:54:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2022-03-20 12:54:24,092 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2022-03-20 12:54:24,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:54:24,092 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2022-03-20 12:54:24,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:54:24,092 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2022-03-20 12:54:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-20 12:54:24,092 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:54:24,092 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:54:24,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 12:54:24,293 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 [2022-03-20 12:54:24,293 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:54:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:54:24,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 107 times [2022-03-20 12:54:24,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:24,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1989700081] [2022-03-20 12:54:24,295 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:54:24,295 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:54:24,295 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:54:24,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 108 times [2022-03-20 12:54:24,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:54:24,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741423789] [2022-03-20 12:54:24,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:54:24,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:54:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:25,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:54:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:54:25,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:54:25,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741423789] [2022-03-20 12:54:25,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741423789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:54:25,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616049584] [2022-03-20 12:54:25,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:54:25,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:54:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:54:25,248 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:54:25,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 12:55:19,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-03-20 12:55:19,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:55:19,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 12:55:19,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:55:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:55:19,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:55:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:55:22,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616049584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:55:22,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:55:22,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-20 12:55:22,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:55:22,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1989700081] [2022-03-20 12:55:22,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1989700081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:55:22,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:55:22,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 12:55:22,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171149817] [2022-03-20 12:55:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:55:22,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 12:55:22,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 12:55:22,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 12:55:22,483 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:55:23,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:55:23,692 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-03-20 12:55:23,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 12:55:23,692 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 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 120 [2022-03-20 12:55:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:55:23,693 INFO L225 Difference]: With dead ends: 130 [2022-03-20 12:55:23,693 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 12:55:23,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 12:55:23,694 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:55:23,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 44 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:55:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 12:55:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-03-20 12:55:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 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) [2022-03-20 12:55:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2022-03-20 12:55:23,715 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2022-03-20 12:55:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:55:23,715 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2022-03-20 12:55:23,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:55:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2022-03-20 12:55:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 12:55:23,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:55:23,715 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:55:23,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 12:55:23,923 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 [2022-03-20 12:55:23,924 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:55:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:55:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 109 times [2022-03-20 12:55:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:23,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1470570498] [2022-03-20 12:55:23,925 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:55:23,925 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:55:23,925 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:55:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 110 times [2022-03-20 12:55:23,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:55:23,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908191895] [2022-03-20 12:55:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:55:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:55:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:24,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:55:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:55:24,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:55:24,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908191895] [2022-03-20 12:55:24,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908191895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:55:24,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481226956] [2022-03-20 12:55:24,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:55:24,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:55:24,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:55:24,894 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:55:24,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 12:55:25,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:55:25,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:55:25,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 12:55:25,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:55:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:55:25,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:55:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:55:28,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481226956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:55:28,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:55:28,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-20 12:55:28,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:55:28,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1470570498] [2022-03-20 12:55:28,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1470570498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:55:28,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:55:28,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 12:55:28,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725041697] [2022-03-20 12:55:28,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:55:28,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 12:55:28,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 12:55:28,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 12:55:28,109 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:55:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:55:29,351 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-03-20 12:55:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 12:55:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 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 122 [2022-03-20 12:55:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:55:29,352 INFO L225 Difference]: With dead ends: 132 [2022-03-20 12:55:29,352 INFO L226 Difference]: Without dead ends: 126 [2022-03-20 12:55:29,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 12:55:29,357 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:55:29,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 49 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:55:29,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-20 12:55:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-03-20 12:55:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 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) [2022-03-20 12:55:29,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2022-03-20 12:55:29,378 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2022-03-20 12:55:29,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:55:29,378 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2022-03-20 12:55:29,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:55:29,378 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2022-03-20 12:55:29,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 12:55:29,379 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:55:29,379 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:55:29,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-20 12:55:29,598 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 [2022-03-20 12:55:29,599 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:55:29,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:55:29,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 111 times [2022-03-20 12:55:29,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:29,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2126452156] [2022-03-20 12:55:29,600 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:55:29,600 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:55:29,600 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:55:29,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 112 times [2022-03-20 12:55:29,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:55:29,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397436018] [2022-03-20 12:55:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:55:29,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:55:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:30,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:55:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:55:30,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:55:30,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397436018] [2022-03-20 12:55:30,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397436018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:55:30,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698738528] [2022-03-20 12:55:30,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:55:30,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:55:30,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:55:30,617 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:55:30,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 12:55:30,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:55:30,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:55:30,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 12:55:30,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:55:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:55:31,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:55:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:55:33,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698738528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:55:33,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:55:33,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-03-20 12:55:33,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:55:33,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2126452156] [2022-03-20 12:55:33,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2126452156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:55:33,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:55:33,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 12:55:33,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385769691] [2022-03-20 12:55:33,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:55:33,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 12:55:33,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:33,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 12:55:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 12:55:33,873 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:55:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:55:35,129 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-03-20 12:55:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 12:55:35,130 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 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 124 [2022-03-20 12:55:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:55:35,130 INFO L225 Difference]: With dead ends: 134 [2022-03-20 12:55:35,130 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 12:55:35,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=13458, Invalid=16992, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 12:55:35,132 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:55:35,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 24 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:55:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 12:55:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-03-20 12:55:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 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) [2022-03-20 12:55:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2022-03-20 12:55:35,154 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2022-03-20 12:55:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:55:35,154 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2022-03-20 12:55:35,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:55:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2022-03-20 12:55:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-20 12:55:35,155 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:55:35,155 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:55:35,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-20 12:55:35,359 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 [2022-03-20 12:55:35,359 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:55:35,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:55:35,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 113 times [2022-03-20 12:55:35,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:35,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1940758743] [2022-03-20 12:55:35,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:55:35,361 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:55:35,361 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:55:35,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 114 times [2022-03-20 12:55:35,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:55:35,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750053632] [2022-03-20 12:55:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:55:35,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:55:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:36,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:55:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:55:36,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:55:36,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750053632] [2022-03-20 12:55:36,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750053632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:55:36,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086258129] [2022-03-20 12:55:36,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:55:36,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:55:36,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:55:36,374 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) [2022-03-20 12:55:36,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 12:57:10,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-03-20 12:57:10,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:57:10,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 12:57:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:57:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:57:10,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:57:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:57:13,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086258129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:57:13,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:57:13,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-20 12:57:13,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:57:13,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1940758743] [2022-03-20 12:57:13,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1940758743] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:57:13,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:57:13,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 12:57:13,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639396314] [2022-03-20 12:57:13,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:57:13,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 12:57:13,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:13,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 12:57:13,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 12:57:13,818 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:57:15,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:57:15,138 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-03-20 12:57:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 12:57:15,138 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 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 126 [2022-03-20 12:57:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:57:15,139 INFO L225 Difference]: With dead ends: 136 [2022-03-20 12:57:15,139 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 12:57:15,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 12:57:15,141 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:57:15,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 39 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:57:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 12:57:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-03-20 12:57:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 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) [2022-03-20 12:57:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-03-20 12:57:15,163 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2022-03-20 12:57:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:57:15,163 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-03-20 12:57:15,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:57:15,164 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-03-20 12:57:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 12:57:15,164 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:57:15,164 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:57:15,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-20 12:57:15,364 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 [2022-03-20 12:57:15,365 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:57:15,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:57:15,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 115 times [2022-03-20 12:57:15,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:15,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1701672971] [2022-03-20 12:57:15,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:57:15,366 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:57:15,366 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:57:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 116 times [2022-03-20 12:57:15,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:57:15,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843060165] [2022-03-20 12:57:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:57:15,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:57:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:16,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:57:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:57:16,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:57:16,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843060165] [2022-03-20 12:57:16,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843060165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:57:16,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786509302] [2022-03-20 12:57:16,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:57:16,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:57:16,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:57:16,434 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) [2022-03-20 12:57:16,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 12:57:16,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:57:16,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:57:16,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 12:57:16,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:57:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:57:16,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:57:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:57:19,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786509302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:57:19,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:57:19,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-20 12:57:19,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:57:19,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1701672971] [2022-03-20 12:57:19,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1701672971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:57:19,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:57:19,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 12:57:19,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299840911] [2022-03-20 12:57:19,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:57:19,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 12:57:19,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:19,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 12:57:19,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 12:57:19,950 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:57:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:57:21,321 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-03-20 12:57:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 12:57:21,322 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 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 128 [2022-03-20 12:57:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:57:21,322 INFO L225 Difference]: With dead ends: 138 [2022-03-20 12:57:21,322 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 12:57:21,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 12:57:21,333 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:57:21,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 39 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:57:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 12:57:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-03-20 12:57:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 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) [2022-03-20 12:57:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2022-03-20 12:57:21,356 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2022-03-20 12:57:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:57:21,356 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2022-03-20 12:57:21,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:57:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2022-03-20 12:57:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-20 12:57:21,357 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:57:21,357 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:57:21,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 12:57:21,563 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 [2022-03-20 12:57:21,563 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:57:21,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:57:21,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 117 times [2022-03-20 12:57:21,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:21,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1462882576] [2022-03-20 12:57:21,565 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:57:21,565 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:57:21,565 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:57:21,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 118 times [2022-03-20 12:57:21,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:57:21,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649411873] [2022-03-20 12:57:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:57:21,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:57:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:22,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:57:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:57:22,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:57:22,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649411873] [2022-03-20 12:57:22,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649411873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:57:22,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46441223] [2022-03-20 12:57:22,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:57:22,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:57:22,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:57:22,654 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) [2022-03-20 12:57:22,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 12:57:23,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:57:23,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:57:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 12:57:23,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:57:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:57:23,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:57:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:57:26,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46441223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:57:26,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:57:26,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-03-20 12:57:26,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:57:26,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1462882576] [2022-03-20 12:57:26,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1462882576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:57:26,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:57:26,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 12:57:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250507524] [2022-03-20 12:57:26,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:57:26,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 12:57:26,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 12:57:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 12:57:26,264 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:57:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:57:27,658 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-03-20 12:57:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 12:57:27,658 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 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 130 [2022-03-20 12:57:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:57:27,659 INFO L225 Difference]: With dead ends: 140 [2022-03-20 12:57:27,659 INFO L226 Difference]: Without dead ends: 134 [2022-03-20 12:57:27,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14886, Invalid=18786, Unknown=0, NotChecked=0, Total=33672 [2022-03-20 12:57:27,660 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:57:27,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 39 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:57:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-20 12:57:27,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-03-20 12:57:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 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) [2022-03-20 12:57:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2022-03-20 12:57:27,684 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2022-03-20 12:57:27,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:57:27,684 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2022-03-20 12:57:27,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:57:27,684 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2022-03-20 12:57:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 12:57:27,685 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:57:27,685 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:57:27,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-20 12:57:27,885 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 [2022-03-20 12:57:27,885 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:57:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:57:27,886 INFO L85 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 119 times [2022-03-20 12:57:27,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:27,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [785554514] [2022-03-20 12:57:27,887 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:57:27,887 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:57:27,887 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:57:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 120 times [2022-03-20 12:57:27,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:57:27,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264449425] [2022-03-20 12:57:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:57:27,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:57:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:29,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:57:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:57:29,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:57:29,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264449425] [2022-03-20 12:57:29,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264449425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:57:29,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571836906] [2022-03-20 12:57:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:57:29,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:57:29,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:57:29,079 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) [2022-03-20 12:57:29,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 12:59:34,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-03-20 12:59:34,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:34,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 12:59:34,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:34,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:38,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571836906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:38,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:38,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-20 12:59:38,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:38,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [785554514] [2022-03-20 12:59:38,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [785554514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:38,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:38,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 12:59:38,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090838747] [2022-03-20 12:59:38,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:38,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 12:59:38,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:38,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 12:59:38,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 12:59:38,031 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:39,473 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-03-20 12:59:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 12:59:39,474 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 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 132 [2022-03-20 12:59:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:39,474 INFO L225 Difference]: With dead ends: 142 [2022-03-20 12:59:39,474 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 12:59:39,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 12:59:39,477 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:39,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 29 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:39,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 12:59:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-03-20 12:59:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 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) [2022-03-20 12:59:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2022-03-20 12:59:39,509 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2022-03-20 12:59:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:39,509 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2022-03-20 12:59:39,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:39,509 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2022-03-20 12:59:39,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 12:59:39,510 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:39,510 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:39,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:39,723 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 [2022-03-20 12:59:39,723 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 121 times [2022-03-20 12:59:39,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:39,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2097091649] [2022-03-20 12:59:39,724 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:39,724 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:39,724 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 122 times [2022-03-20 12:59:39,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:39,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121301034] [2022-03-20 12:59:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:39,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:40,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:40,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121301034] [2022-03-20 12:59:40,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121301034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103760516] [2022-03-20 12:59:40,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:40,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:40,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:40,884 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) [2022-03-20 12:59:40,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 12:59:41,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:41,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:41,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 12:59:41,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:41,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:44,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103760516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:44,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:44,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-20 12:59:44,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:44,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2097091649] [2022-03-20 12:59:44,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2097091649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:44,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:44,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 12:59:44,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063448084] [2022-03-20 12:59:44,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:44,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 12:59:44,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:44,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 12:59:44,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 12:59:44,691 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:46,154 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-03-20 12:59:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 12:59:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 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 134 [2022-03-20 12:59:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:46,155 INFO L225 Difference]: With dead ends: 144 [2022-03-20 12:59:46,155 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 12:59:46,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 12:59:46,157 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:46,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 34 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 12:59:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-03-20 12:59:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 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) [2022-03-20 12:59:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2022-03-20 12:59:46,182 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2022-03-20 12:59:46,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:46,182 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2022-03-20 12:59:46,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:46,183 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2022-03-20 12:59:46,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-20 12:59:46,183 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:46,183 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:46,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:46,384 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 [2022-03-20 12:59:46,384 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:46,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 123 times [2022-03-20 12:59:46,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:46,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474232526] [2022-03-20 12:59:46,386 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:46,386 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:46,386 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:46,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 124 times [2022-03-20 12:59:46,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:46,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60829064] [2022-03-20 12:59:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:46,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:47,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:47,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:47,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60829064] [2022-03-20 12:59:47,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60829064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:47,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430215678] [2022-03-20 12:59:47,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:47,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:47,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:47,588 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) [2022-03-20 12:59:47,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 12:59:47,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:47,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:47,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 12:59:47,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:48,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:51,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430215678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:51,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:51,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-03-20 12:59:51,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:51,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474232526] [2022-03-20 12:59:51,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474232526] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:51,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:51,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 12:59:51,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507257574] [2022-03-20 12:59:51,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:51,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 12:59:51,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:51,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 12:59:51,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 12:59:51,521 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:53,047 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-03-20 12:59:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 12:59:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 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 136 [2022-03-20 12:59:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:53,048 INFO L225 Difference]: With dead ends: 146 [2022-03-20 12:59:53,048 INFO L226 Difference]: Without dead ends: 140 [2022-03-20 12:59:53,050 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=16386, Invalid=20670, Unknown=0, NotChecked=0, Total=37056 [2022-03-20 12:59:53,050 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:53,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 29 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-20 12:59:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-03-20 12:59:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 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) [2022-03-20 12:59:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-03-20 12:59:53,076 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2022-03-20 12:59:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:53,076 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-03-20 12:59:53,076 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:59:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-03-20 12:59:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 12:59:53,077 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:53,077 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:53,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-20 12:59:53,277 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 [2022-03-20 12:59:53,277 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 125 times [2022-03-20 12:59:53,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:53,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1356048992] [2022-03-20 12:59:53,279 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:53,279 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:53,279 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:53,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 126 times [2022-03-20 12:59:53,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:53,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113631714] [2022-03-20 12:59:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:53,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:54,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:54,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:54,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113631714] [2022-03-20 12:59:54,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113631714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:54,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837460617] [2022-03-20 12:59:54,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:54,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:54,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:54,491 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) [2022-03-20 12:59:54,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 13:03:15,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-03-20 13:03:15,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:15,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 13:03:15,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:15,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:19,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837460617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:19,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:19,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-20 13:03:19,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:19,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1356048992] [2022-03-20 13:03:19,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1356048992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:19,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:19,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 13:03:19,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028036045] [2022-03-20 13:03:19,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:19,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 13:03:19,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:19,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 13:03:19,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 13:03:19,016 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:20,604 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-03-20 13:03:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 13:03:20,604 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 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 138 [2022-03-20 13:03:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:20,605 INFO L225 Difference]: With dead ends: 148 [2022-03-20 13:03:20,605 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 13:03:20,608 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 13:03:20,608 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:20,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 49 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 13:03:20,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-03-20 13:03:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 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) [2022-03-20 13:03:20,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2022-03-20 13:03:20,642 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2022-03-20 13:03:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:20,642 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2022-03-20 13:03:20,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2022-03-20 13:03:20,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 13:03:20,642 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:20,642 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:20,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-20 13:03:20,843 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 [2022-03-20 13:03:20,843 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:20,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:20,843 INFO L85 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 127 times [2022-03-20 13:03:20,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:20,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2146196502] [2022-03-20 13:03:20,844 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:20,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:20,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:20,845 INFO L85 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 128 times [2022-03-20 13:03:20,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:20,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336309594] [2022-03-20 13:03:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:20,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:22,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:22,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336309594] [2022-03-20 13:03:22,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336309594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318898658] [2022-03-20 13:03:22,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:22,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:22,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:22,105 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) [2022-03-20 13:03:22,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 13:03:22,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:22,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:22,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 13:03:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:22,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:26,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318898658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:26,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:26,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-20 13:03:26,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:26,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2146196502] [2022-03-20 13:03:26,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2146196502] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:26,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:26,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 13:03:26,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106920050] [2022-03-20 13:03:26,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:26,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 13:03:26,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:26,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 13:03:26,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 13:03:26,294 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:27,898 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-03-20 13:03:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 13:03:27,899 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 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 140 [2022-03-20 13:03:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:27,899 INFO L225 Difference]: With dead ends: 150 [2022-03-20 13:03:27,899 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 13:03:27,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 13:03:27,902 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:27,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 44 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 13:03:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2022-03-20 13:03:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 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) [2022-03-20 13:03:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2022-03-20 13:03:27,937 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2022-03-20 13:03:27,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:27,937 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2022-03-20 13:03:27,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:27,937 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2022-03-20 13:03:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-20 13:03:27,937 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:27,937 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:27,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-20 13:03:28,138 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 [2022-03-20 13:03:28,138 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:28,138 INFO L85 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 129 times [2022-03-20 13:03:28,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:28,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925059474] [2022-03-20 13:03:28,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:28,139 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:28,139 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 130 times [2022-03-20 13:03:28,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:28,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710239441] [2022-03-20 13:03:28,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:28,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:29,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:29,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:29,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710239441] [2022-03-20 13:03:29,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710239441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:29,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055348163] [2022-03-20 13:03:29,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:29,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:29,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:29,442 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) [2022-03-20 13:03:29,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 13:03:29,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:29,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:29,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 13:03:29,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:30,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:33,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055348163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:33,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:33,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-03-20 13:03:33,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:33,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925059474] [2022-03-20 13:03:33,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925059474] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:33,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:33,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 13:03:33,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383560514] [2022-03-20 13:03:33,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:33,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 13:03:33,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 13:03:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 13:03:33,734 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:35,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:35,390 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-03-20 13:03:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 13:03:35,391 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 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 142 [2022-03-20 13:03:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:35,391 INFO L225 Difference]: With dead ends: 152 [2022-03-20 13:03:35,391 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 13:03:35,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=17958, Invalid=22644, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 13:03:35,394 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 140 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:35,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 44 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 13:03:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-03-20 13:03:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 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) [2022-03-20 13:03:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2022-03-20 13:03:35,433 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2022-03-20 13:03:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:35,433 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2022-03-20 13:03:35,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2022-03-20 13:03:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 13:03:35,434 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:35,434 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:35,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-20 13:03:35,635 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 [2022-03-20 13:03:35,635 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:35,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:35,636 INFO L85 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 131 times [2022-03-20 13:03:35,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:35,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [760312297] [2022-03-20 13:03:35,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:35,637 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:35,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:35,637 INFO L85 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 132 times [2022-03-20 13:03:35,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:35,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542414331] [2022-03-20 13:03:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:35,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:36,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:36,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:36,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542414331] [2022-03-20 13:03:36,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542414331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:36,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124965844] [2022-03-20 13:03:36,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:36,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:36,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:36,959 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) [2022-03-20 13:03:36,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process