/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-34549b5 [2022-04-06 14:23:38,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:23:38,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:23:38,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 14:23:38,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 14:23:38,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 14:23:38,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 14:23:38,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 14:23:38,494 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:23:38,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:23:38,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:23:38,495 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:23:38,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:23:38,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:23:38,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:23:38,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:23:38,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:23:38,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:23:38,496 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:23:38,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:23:38,496 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:23:38,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:23:38,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:23:38,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:23:38,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:23:38,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:23:38,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:23:38,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:23:38,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:23:38,497 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:23:38,498 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:23:38,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:23:38,498 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:23:38,498 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:23:38,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:23:38,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:23:38,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:23:38,698 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:23:38,699 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:23:38,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2022-04-06 14:23:38,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acf846b4f/2a0bdfe357b3491fbe456203e1a79f81/FLAG90596148b [2022-04-06 14:23:39,105 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:23:39,106 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2022-04-06 14:23:39,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acf846b4f/2a0bdfe357b3491fbe456203e1a79f81/FLAG90596148b [2022-04-06 14:23:39,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acf846b4f/2a0bdfe357b3491fbe456203e1a79f81 [2022-04-06 14:23:39,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:23:39,127 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:23:39,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:23:39,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:23:39,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:23:39,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:23:39" (1/1) ... [2022-04-06 14:23:39,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45323447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:23:39, skipping insertion in model container [2022-04-06 14:23:39,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:23:39" (1/1) ... [2022-04-06 14:23:39,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:23:39,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:23:39,263 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] [2022-04-06 14:23:39,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:23:39,283 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:23:39,290 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] [2022-04-06 14:23:39,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:23:39,301 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:23:39,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:23:39 WrapperNode [2022-04-06 14:23:39,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:23:39,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:23:39,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:23:39,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:23:39,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:23:39" (1/1) ... [2022-04-06 14:23:39,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:23:39" (1/1) ... [2022-04-06 14:23:39,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:23:39" (1/1) ... [2022-04-06 14:23:39,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:23:39" (1/1) ... [2022-04-06 14:23:39,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:23:39" (1/1) ... [2022-04-06 14:23:39,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:23:39" (1/1) ... [2022-04-06 14:23:39,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:23:39" (1/1) ... [2022-04-06 14:23:39,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:23:39,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:23:39,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:23:39,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:23:39,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:23:39" (1/1) ... [2022-04-06 14:23:39,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:23:39,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:39,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 14:23:39,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 14:23:39,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:23:39,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:23:39,387 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:23:39,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 14:23:39,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:23:39,387 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:23:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:23:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 14:23:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 14:23:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:23:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:23:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:23:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:23:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 14:23:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-04-06 14:23:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:23:39,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:23:39,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:23:39,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:23:39,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:23:39,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:23:39,453 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:23:39,454 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:23:39,587 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:23:39,591 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:23:39,591 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 14:23:39,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:23:39 BoogieIcfgContainer [2022-04-06 14:23:39,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:23:39,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:23:39,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:23:39,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:23:39,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:23:39" (1/3) ... [2022-04-06 14:23:39,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2177fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:23:39, skipping insertion in model container [2022-04-06 14:23:39,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:23:39" (2/3) ... [2022-04-06 14:23:39,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2177fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:23:39, skipping insertion in model container [2022-04-06 14:23:39,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:23:39" (3/3) ... [2022-04-06 14:23:39,600 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.i [2022-04-06 14:23:39,603 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:23:39,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:23:39,637 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:23:39,644 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 14:23:39,644 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:23:39,655 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) [2022-04-06 14:23:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 14:23:39,667 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:39,668 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:39,668 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:39,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 1 times [2022-04-06 14:23:39,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:39,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2037533826] [2022-04-06 14:23:39,686 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:23:39,686 INFO L85 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 2 times [2022-04-06 14:23:39,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:39,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324455738] [2022-04-06 14:23:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:39,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:39,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:39,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:39,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324455738] [2022-04-06 14:23:39,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324455738] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:39,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:39,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:23:39,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:39,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2037533826] [2022-04-06 14:23:39,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2037533826] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:39,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:39,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:23:39,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194938356] [2022-04-06 14:23:39,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:39,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 14:23:39,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:39,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 14:23:39,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:23:39,880 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) [2022-04-06 14:23:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:39,921 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-06 14:23:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 14:23:39,923 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 [2022-04-06 14:23:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:39,929 INFO L225 Difference]: With dead ends: 34 [2022-04-06 14:23:39,929 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 14:23:39,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:23:39,934 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 [2022-04-06 14:23:39,935 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] [2022-04-06 14:23:39,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 14:23:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 14:23:39,961 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) [2022-04-06 14:23:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-06 14:23:39,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-04-06 14:23:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:39,963 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-06 14:23:39,963 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) [2022-04-06 14:23:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-06 14:23:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 14:23:39,964 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:39,964 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:39,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:23:39,965 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 1 times [2022-04-06 14:23:39,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:39,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [587261741] [2022-04-06 14:23:39,967 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:23:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 2 times [2022-04-06 14:23:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:39,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685282151] [2022-04-06 14:23:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:39,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:40,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:40,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:40,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685282151] [2022-04-06 14:23:40,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685282151] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:40,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:40,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:23:40,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:40,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [587261741] [2022-04-06 14:23:40,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [587261741] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:40,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:40,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:23:40,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835133159] [2022-04-06 14:23:40,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:40,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:23:40,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:23:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 14:23:40,047 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) [2022-04-06 14:23:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:40,077 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-04-06 14:23:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:23:40,078 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 [2022-04-06 14:23:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:40,082 INFO L225 Difference]: With dead ends: 22 [2022-04-06 14:23:40,082 INFO L226 Difference]: Without dead ends: 16 [2022-04-06 14:23:40,085 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 14:23:40,087 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 [2022-04-06 14:23:40,088 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] [2022-04-06 14:23:40,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-06 14:23:40,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-04-06 14:23:40,094 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) [2022-04-06 14:23:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-06 14:23:40,095 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-04-06 14:23:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:40,095 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-06 14:23:40,095 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) [2022-04-06 14:23:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-06 14:23:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 14:23:40,096 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:40,096 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:40,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 14:23:40,098 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:40,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:40,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 1 times [2022-04-06 14:23:40,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:40,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23561702] [2022-04-06 14:23:40,112 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:40,112 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:40,112 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 2 times [2022-04-06 14:23:40,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:40,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499505405] [2022-04-06 14:23:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:40,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:40,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:40,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:40,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499505405] [2022-04-06 14:23:40,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499505405] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:40,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313973368] [2022-04-06 14:23:40,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:40,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:40,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:40,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:40,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 14:23:40,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:40,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:40,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 14:23:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:40,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:40,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313973368] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:40,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:40,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 14:23:40,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:40,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23561702] [2022-04-06 14:23:40,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23561702] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:40,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:40,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:23:40,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101452328] [2022-04-06 14:23:40,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:40,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:23:40,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:23:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 14:23:40,316 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) [2022-04-06 14:23:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:40,345 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-04-06 14:23:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:23:40,346 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 [2022-04-06 14:23:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:40,346 INFO L225 Difference]: With dead ends: 24 [2022-04-06 14:23:40,346 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 14:23:40,347 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 [2022-04-06 14:23:40,347 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 [2022-04-06 14:23:40,348 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] [2022-04-06 14:23:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 14:23:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-04-06 14:23:40,350 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) [2022-04-06 14:23:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-04-06 14:23:40,350 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2022-04-06 14:23:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:40,351 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-04-06 14:23:40,351 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) [2022-04-06 14:23:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-04-06 14:23:40,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 14:23:40,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:40,351 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:40,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:40,572 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:40,572 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 3 times [2022-04-06 14:23:40,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:40,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [176945016] [2022-04-06 14:23:40,579 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:40,579 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:40,579 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 4 times [2022-04-06 14:23:40,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:40,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023129657] [2022-04-06 14:23:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:40,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:40,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:40,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:40,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023129657] [2022-04-06 14:23:40,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023129657] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:40,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688942793] [2022-04-06 14:23:40,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:23:40,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:40,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:40,661 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:40,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 14:23:40,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:23:40,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:40,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 14:23:40,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:40,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:40,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688942793] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:40,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:40,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 14:23:40,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:40,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [176945016] [2022-04-06 14:23:40,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [176945016] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:40,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:40,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:23:40,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443784417] [2022-04-06 14:23:40,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:40,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:23:40,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:40,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:23:40,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 14:23:40,815 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) [2022-04-06 14:23:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:40,856 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-04-06 14:23:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:23:40,856 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 [2022-04-06 14:23:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:40,857 INFO L225 Difference]: With dead ends: 26 [2022-04-06 14:23:40,857 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 14:23:40,858 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 [2022-04-06 14:23:40,859 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 [2022-04-06 14:23:40,860 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] [2022-04-06 14:23:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 14:23:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-04-06 14:23:40,866 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) [2022-04-06 14:23:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-04-06 14:23:40,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2022-04-06 14:23:40,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:40,867 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-04-06 14:23:40,867 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) [2022-04-06 14:23:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-04-06 14:23:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 14:23:40,867 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:40,868 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:40,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:41,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 14:23:41,092 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:41,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:41,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 5 times [2022-04-06 14:23:41,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:41,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [273630740] [2022-04-06 14:23:41,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:41,094 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:41,094 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:41,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 6 times [2022-04-06 14:23:41,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:41,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679389447] [2022-04-06 14:23:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:41,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:41,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:41,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:41,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679389447] [2022-04-06 14:23:41,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679389447] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:41,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375992869] [2022-04-06 14:23:41,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:23:41,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:41,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:41,168 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:41,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 14:23:41,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 14:23:41,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:41,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 14:23:41,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:41,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:41,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375992869] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:41,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:41,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 14:23:41,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:41,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [273630740] [2022-04-06 14:23:41,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [273630740] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:41,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:41,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:23:41,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760547512] [2022-04-06 14:23:41,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:41,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:23:41,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:41,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:23:41,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:23:41,335 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) [2022-04-06 14:23:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:41,382 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-04-06 14:23:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:23:41,383 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 [2022-04-06 14:23:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:41,383 INFO L225 Difference]: With dead ends: 28 [2022-04-06 14:23:41,383 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 14:23:41,384 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 [2022-04-06 14:23:41,384 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 [2022-04-06 14:23:41,385 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] [2022-04-06 14:23:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 14:23:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-04-06 14:23:41,391 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) [2022-04-06 14:23:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-04-06 14:23:41,392 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2022-04-06 14:23:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:41,392 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-04-06 14:23:41,392 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) [2022-04-06 14:23:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-04-06 14:23:41,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 14:23:41,393 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:41,393 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:41,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 14:23:41,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:41,607 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 7 times [2022-04-06 14:23:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:41,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [27529653] [2022-04-06 14:23:41,610 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:41,610 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:41,610 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 8 times [2022-04-06 14:23:41,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:41,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758614705] [2022-04-06 14:23:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:41,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:41,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:41,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758614705] [2022-04-06 14:23:41,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758614705] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944931306] [2022-04-06 14:23:41,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:41,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:41,673 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:41,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 14:23:41,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:41,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:41,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:23:41,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:41,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:41,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944931306] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:41,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:41,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 14:23:41,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:41,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [27529653] [2022-04-06 14:23:41,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [27529653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:41,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:41,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:23:41,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086876158] [2022-04-06 14:23:41,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:41,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:23:41,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:41,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:23:41,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-04-06 14:23:41,840 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) [2022-04-06 14:23:41,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:41,897 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-04-06 14:23:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:23:41,897 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 [2022-04-06 14:23:41,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:41,898 INFO L225 Difference]: With dead ends: 30 [2022-04-06 14:23:41,898 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 14:23:41,898 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 [2022-04-06 14:23:41,899 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 [2022-04-06 14:23:41,899 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] [2022-04-06 14:23:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 14:23:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-04-06 14:23:41,901 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) [2022-04-06 14:23:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-04-06 14:23:41,902 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2022-04-06 14:23:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:41,902 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-04-06 14:23:41,902 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) [2022-04-06 14:23:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-04-06 14:23:41,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 14:23:41,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:41,903 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:41,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:42,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:42,115 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 9 times [2022-04-06 14:23:42,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:42,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [341077436] [2022-04-06 14:23:42,117 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:42,118 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:42,118 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 10 times [2022-04-06 14:23:42,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:42,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459495954] [2022-04-06 14:23:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:42,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:42,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:42,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:42,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459495954] [2022-04-06 14:23:42,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459495954] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:42,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933529792] [2022-04-06 14:23:42,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:23:42,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:42,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:42,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:42,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 14:23:42,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:23:42,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:42,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:23:42,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:42,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:42,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933529792] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:42,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:42,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 14:23:42,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:42,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [341077436] [2022-04-06 14:23:42,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [341077436] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:42,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:42,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:23:42,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505029791] [2022-04-06 14:23:42,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:42,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:23:42,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:42,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:23:42,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:23:42,319 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) [2022-04-06 14:23:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:42,372 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-04-06 14:23:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:23:42,372 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 [2022-04-06 14:23:42,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:42,373 INFO L225 Difference]: With dead ends: 32 [2022-04-06 14:23:42,373 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 14:23:42,374 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 [2022-04-06 14:23:42,374 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 [2022-04-06 14:23:42,375 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] [2022-04-06 14:23:42,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 14:23:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-06 14:23:42,381 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) [2022-04-06 14:23:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-04-06 14:23:42,382 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2022-04-06 14:23:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:42,382 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-04-06 14:23:42,382 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) [2022-04-06 14:23:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-04-06 14:23:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 14:23:42,384 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:42,384 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:42,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:42,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:42,602 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:42,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 11 times [2022-04-06 14:23:42,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:42,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [46877851] [2022-04-06 14:23:42,604 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:42,604 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:42,604 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:42,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 12 times [2022-04-06 14:23:42,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:42,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663425164] [2022-04-06 14:23:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:42,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:42,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:42,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:42,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663425164] [2022-04-06 14:23:42,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663425164] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:42,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615560054] [2022-04-06 14:23:42,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:23:42,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:42,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:42,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:42,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 14:23:42,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:23:42,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:42,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 14:23:42,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:42,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:42,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615560054] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:42,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:42,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 14:23:42,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:42,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [46877851] [2022-04-06 14:23:42,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [46877851] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:42,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:42,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:23:42,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372224745] [2022-04-06 14:23:42,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:42,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:23:42,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:42,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:23:42,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:23:42,855 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) [2022-04-06 14:23:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:42,932 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-04-06 14:23:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:23:42,932 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 [2022-04-06 14:23:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:42,933 INFO L225 Difference]: With dead ends: 34 [2022-04-06 14:23:42,933 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 14:23:42,933 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 [2022-04-06 14:23:42,933 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 [2022-04-06 14:23:42,934 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] [2022-04-06 14:23:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 14:23:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-06 14:23:42,936 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) [2022-04-06 14:23:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-04-06 14:23:42,937 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2022-04-06 14:23:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:42,937 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-04-06 14:23:42,937 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) [2022-04-06 14:23:42,937 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-04-06 14:23:42,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 14:23:42,937 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:42,938 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:42,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:43,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:43,154 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 13 times [2022-04-06 14:23:43,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:43,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [528839107] [2022-04-06 14:23:43,156 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:43,156 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:43,156 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 14 times [2022-04-06 14:23:43,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:43,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855405356] [2022-04-06 14:23:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:43,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:43,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:43,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:43,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855405356] [2022-04-06 14:23:43,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855405356] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:43,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41355536] [2022-04-06 14:23:43,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:43,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:43,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:43,242 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:43,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 14:23:43,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:43,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 14:23:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:43,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:43,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41355536] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:43,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:43,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 14:23:43,438 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:43,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [528839107] [2022-04-06 14:23:43,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [528839107] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:43,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:43,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:23:43,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280710826] [2022-04-06 14:23:43,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:43,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:23:43,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:43,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:23:43,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-04-06 14:23:43,439 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) [2022-04-06 14:23:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:43,530 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-04-06 14:23:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:23:43,530 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 [2022-04-06 14:23:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:43,530 INFO L225 Difference]: With dead ends: 36 [2022-04-06 14:23:43,530 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 14:23:43,531 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:23:43,531 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 [2022-04-06 14:23:43,531 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] [2022-04-06 14:23:43,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 14:23:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-04-06 14:23:43,534 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) [2022-04-06 14:23:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-04-06 14:23:43,535 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2022-04-06 14:23:43,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:43,535 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-04-06 14:23:43,535 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) [2022-04-06 14:23:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-04-06 14:23:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 14:23:43,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:43,536 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:43,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:43,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:43,751 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:43,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 15 times [2022-04-06 14:23:43,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:43,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [577601176] [2022-04-06 14:23:43,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:43,753 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:43,753 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 16 times [2022-04-06 14:23:43,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:43,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490196222] [2022-04-06 14:23:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:43,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:43,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:43,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:43,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490196222] [2022-04-06 14:23:43,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490196222] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:43,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829120481] [2022-04-06 14:23:43,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:23:43,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:43,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:43,816 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:43,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 14:23:43,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:23:43,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:43,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 14:23:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:43,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:44,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829120481] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:44,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:44,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 14:23:44,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:44,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [577601176] [2022-04-06 14:23:44,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [577601176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:44,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:44,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:23:44,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005172189] [2022-04-06 14:23:44,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:44,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:23:44,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:44,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:23:44,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:23:44,026 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) [2022-04-06 14:23:44,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:44,117 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-04-06 14:23:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:23:44,118 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 [2022-04-06 14:23:44,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:44,118 INFO L225 Difference]: With dead ends: 38 [2022-04-06 14:23:44,118 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 14:23:44,119 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 [2022-04-06 14:23:44,119 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 [2022-04-06 14:23:44,120 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] [2022-04-06 14:23:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 14:23:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-04-06 14:23:44,123 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) [2022-04-06 14:23:44,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-04-06 14:23:44,126 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2022-04-06 14:23:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:44,127 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-04-06 14:23:44,127 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) [2022-04-06 14:23:44,127 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-04-06 14:23:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 14:23:44,129 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:44,129 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:44,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:44,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 14:23:44,344 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:44,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 17 times [2022-04-06 14:23:44,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:44,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [15775126] [2022-04-06 14:23:44,345 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:44,346 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:44,346 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:44,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 18 times [2022-04-06 14:23:44,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:44,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575550964] [2022-04-06 14:23:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:44,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:44,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:44,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:44,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575550964] [2022-04-06 14:23:44,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575550964] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:44,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654900514] [2022-04-06 14:23:44,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:23:44,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:44,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:44,429 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:44,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 14:23:44,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 14:23:44,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:44,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 14:23:44,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:44,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:44,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654900514] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:44,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:44,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 14:23:44,724 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:44,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [15775126] [2022-04-06 14:23:44,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [15775126] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:44,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:44,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:23:44,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451299184] [2022-04-06 14:23:44,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:44,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:23:44,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:44,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:23:44,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:23:44,726 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) [2022-04-06 14:23:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:44,828 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-04-06 14:23:44,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:23:44,828 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 [2022-04-06 14:23:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:44,829 INFO L225 Difference]: With dead ends: 40 [2022-04-06 14:23:44,829 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 14:23:44,829 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 [2022-04-06 14:23:44,830 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 [2022-04-06 14:23:44,830 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] [2022-04-06 14:23:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 14:23:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-04-06 14:23:44,833 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) [2022-04-06 14:23:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-04-06 14:23:44,833 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2022-04-06 14:23:44,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:44,833 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-04-06 14:23:44,834 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) [2022-04-06 14:23:44,834 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-04-06 14:23:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 14:23:44,834 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:44,834 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:44,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:45,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:45,047 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:45,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:45,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 19 times [2022-04-06 14:23:45,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:45,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1224720983] [2022-04-06 14:23:45,049 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:45,049 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:45,049 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:45,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 20 times [2022-04-06 14:23:45,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:45,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975222401] [2022-04-06 14:23:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:45,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:45,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:45,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:45,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975222401] [2022-04-06 14:23:45,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975222401] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:45,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183781027] [2022-04-06 14:23:45,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:45,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:45,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:45,154 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:45,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 14:23:45,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:45,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 14:23:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:45,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:45,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183781027] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:45,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:45,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 14:23:45,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:45,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1224720983] [2022-04-06 14:23:45,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1224720983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:45,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:45,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:23:45,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820436027] [2022-04-06 14:23:45,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:45,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:23:45,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:45,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:23:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:23:45,463 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) [2022-04-06 14:23:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:45,578 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-04-06 14:23:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:23:45,578 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 [2022-04-06 14:23:45,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:45,578 INFO L225 Difference]: With dead ends: 42 [2022-04-06 14:23:45,578 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 14:23:45,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 14:23:45,579 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 [2022-04-06 14:23:45,580 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] [2022-04-06 14:23:45,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 14:23:45,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-06 14:23:45,583 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) [2022-04-06 14:23:45,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-04-06 14:23:45,583 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2022-04-06 14:23:45,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:45,583 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-04-06 14:23:45,583 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) [2022-04-06 14:23:45,584 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-04-06 14:23:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 14:23:45,584 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:45,584 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:45,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:45,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 14:23:45,795 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:45,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:45,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 21 times [2022-04-06 14:23:45,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:45,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1111753970] [2022-04-06 14:23:45,797 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:45,797 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:45,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:45,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 22 times [2022-04-06 14:23:45,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:45,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23808007] [2022-04-06 14:23:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:45,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:45,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:45,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23808007] [2022-04-06 14:23:45,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23808007] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060913423] [2022-04-06 14:23:45,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:23:45,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:45,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:45,885 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:45,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 14:23:45,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:23:45,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:45,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 14:23:45,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:46,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:46,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060913423] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:46,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:46,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 14:23:46,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:46,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1111753970] [2022-04-06 14:23:46,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1111753970] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:46,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:46,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:23:46,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003056195] [2022-04-06 14:23:46,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:46,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:23:46,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:46,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:23:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:23:46,199 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) [2022-04-06 14:23:46,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:46,326 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-04-06 14:23:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:23:46,327 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 [2022-04-06 14:23:46,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:46,327 INFO L225 Difference]: With dead ends: 44 [2022-04-06 14:23:46,327 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 14:23:46,328 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 [2022-04-06 14:23:46,328 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 [2022-04-06 14:23:46,328 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] [2022-04-06 14:23:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 14:23:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-04-06 14:23:46,332 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) [2022-04-06 14:23:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-04-06 14:23:46,332 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2022-04-06 14:23:46,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:46,332 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-04-06 14:23:46,332 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) [2022-04-06 14:23:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-04-06 14:23:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 14:23:46,333 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:46,333 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:46,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:46,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 14:23:46,548 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:46,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:46,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 23 times [2022-04-06 14:23:46,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:46,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2061300551] [2022-04-06 14:23:46,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:46,550 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:46,550 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:46,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 24 times [2022-04-06 14:23:46,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:46,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768780760] [2022-04-06 14:23:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:46,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:46,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:46,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:46,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768780760] [2022-04-06 14:23:46,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768780760] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:46,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401587507] [2022-04-06 14:23:46,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:23:46,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:46,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:46,676 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:46,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 14:23:46,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 14:23:46,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:46,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 14:23:46,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:46,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:47,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401587507] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:47,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:47,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 14:23:47,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:47,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2061300551] [2022-04-06 14:23:47,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2061300551] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:47,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:47,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:23:47,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775112129] [2022-04-06 14:23:47,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:47,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:23:47,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:47,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:23:47,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-04-06 14:23:47,135 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) [2022-04-06 14:23:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:47,272 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-04-06 14:23:47,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:23:47,273 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 [2022-04-06 14:23:47,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:47,273 INFO L225 Difference]: With dead ends: 46 [2022-04-06 14:23:47,273 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 14:23:47,274 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 [2022-04-06 14:23:47,274 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 [2022-04-06 14:23:47,274 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] [2022-04-06 14:23:47,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 14:23:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-04-06 14:23:47,278 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) [2022-04-06 14:23:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-04-06 14:23:47,278 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2022-04-06 14:23:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:47,278 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-04-06 14:23:47,278 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) [2022-04-06 14:23:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-04-06 14:23:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 14:23:47,279 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:47,279 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:47,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:47,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 14:23:47,491 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:47,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:47,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 25 times [2022-04-06 14:23:47,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:47,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [147471261] [2022-04-06 14:23:47,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:47,493 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:47,493 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 26 times [2022-04-06 14:23:47,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:47,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066843553] [2022-04-06 14:23:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:47,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:47,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:47,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:47,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066843553] [2022-04-06 14:23:47,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066843553] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:47,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123092687] [2022-04-06 14:23:47,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:47,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:47,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:47,617 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:47,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 14:23:47,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:47,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:47,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 14:23:47,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:47,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:48,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123092687] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:48,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:48,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 14:23:48,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:48,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [147471261] [2022-04-06 14:23:48,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [147471261] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:48,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:48,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:23:48,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553525379] [2022-04-06 14:23:48,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:48,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:23:48,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:48,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:23:48,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-04-06 14:23:48,027 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) [2022-04-06 14:23:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:48,180 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-04-06 14:23:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:23:48,180 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 [2022-04-06 14:23:48,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:48,180 INFO L225 Difference]: With dead ends: 48 [2022-04-06 14:23:48,181 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 14:23:48,181 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 [2022-04-06 14:23:48,183 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:48,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 29 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:23:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 14:23:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-04-06 14:23:48,195 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) [2022-04-06 14:23:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-04-06 14:23:48,195 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2022-04-06 14:23:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:48,195 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-04-06 14:23:48,196 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) [2022-04-06 14:23:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-04-06 14:23:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 14:23:48,196 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:48,196 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:48,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 14:23:48,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 14:23:48,397 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:48,397 INFO L85 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 27 times [2022-04-06 14:23:48,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:48,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1331185151] [2022-04-06 14:23:48,398 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:48,398 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:48,398 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:48,398 INFO L85 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 28 times [2022-04-06 14:23:48,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:48,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336476369] [2022-04-06 14:23:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:48,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:48,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:48,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:48,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336476369] [2022-04-06 14:23:48,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336476369] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:48,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096414092] [2022-04-06 14:23:48,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:23:48,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:48,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:48,536 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:48,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 14:23:48,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:23:48,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:48,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 14:23:48,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:48,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:48,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096414092] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:48,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:48,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 14:23:48,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:48,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1331185151] [2022-04-06 14:23:48,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1331185151] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:48,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:48,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:23:48,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945337435] [2022-04-06 14:23:48,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:48,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:23:48,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:23:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:23:48,957 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) [2022-04-06 14:23:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:49,127 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-04-06 14:23:49,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 14:23:49,128 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 [2022-04-06 14:23:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:49,128 INFO L225 Difference]: With dead ends: 50 [2022-04-06 14:23:49,129 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 14:23:49,129 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 [2022-04-06 14:23:49,130 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 [2022-04-06 14:23:49,130 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] [2022-04-06 14:23:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 14:23:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-04-06 14:23:49,134 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) [2022-04-06 14:23:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-04-06 14:23:49,134 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2022-04-06 14:23:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:49,134 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-04-06 14:23:49,134 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) [2022-04-06 14:23:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-04-06 14:23:49,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 14:23:49,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:49,135 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:49,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:49,338 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:49,339 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:49,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 29 times [2022-04-06 14:23:49,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:49,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371462797] [2022-04-06 14:23:49,352 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:49,352 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:49,352 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:49,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 30 times [2022-04-06 14:23:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:49,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675171505] [2022-04-06 14:23:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:49,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:49,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:49,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675171505] [2022-04-06 14:23:49,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675171505] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612967613] [2022-04-06 14:23:49,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:23:49,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:49,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:49,507 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:49,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 14:23:49,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 14:23:49,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:49,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 14:23:49,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:49,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:50,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612967613] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:50,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:50,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 14:23:50,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:50,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371462797] [2022-04-06 14:23:50,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371462797] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:50,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:50,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 14:23:50,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811737201] [2022-04-06 14:23:50,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:50,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 14:23:50,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:50,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 14:23:50,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 14:23:50,137 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) [2022-04-06 14:23:50,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:50,331 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-04-06 14:23:50,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:23:50,331 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 [2022-04-06 14:23:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:50,332 INFO L225 Difference]: With dead ends: 52 [2022-04-06 14:23:50,332 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 14:23:50,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:23:50,333 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 [2022-04-06 14:23:50,333 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] [2022-04-06 14:23:50,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 14:23:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 14:23:50,337 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) [2022-04-06 14:23:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-04-06 14:23:50,338 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2022-04-06 14:23:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:50,338 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-04-06 14:23:50,338 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) [2022-04-06 14:23:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-04-06 14:23:50,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 14:23:50,338 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:50,338 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:50,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:50,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 14:23:50,543 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:50,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:50,544 INFO L85 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 31 times [2022-04-06 14:23:50,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:50,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [10682533] [2022-04-06 14:23:50,545 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:50,545 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:50,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:50,545 INFO L85 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 32 times [2022-04-06 14:23:50,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:50,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276973898] [2022-04-06 14:23:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:50,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:50,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:50,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:50,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276973898] [2022-04-06 14:23:50,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276973898] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:50,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628586721] [2022-04-06 14:23:50,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:50,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:50,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:50,699 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:50,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 14:23:50,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:50,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:50,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:23:50,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:50,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:51,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628586721] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:51,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:51,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 14:23:51,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [10682533] [2022-04-06 14:23:51,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [10682533] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:51,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:51,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:23:51,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782794617] [2022-04-06 14:23:51,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:51,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:23:51,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:23:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:23:51,162 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) [2022-04-06 14:23:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:51,349 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-04-06 14:23:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 14:23:51,349 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 [2022-04-06 14:23:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:51,350 INFO L225 Difference]: With dead ends: 54 [2022-04-06 14:23:51,350 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 14:23:51,351 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 [2022-04-06 14:23:51,351 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, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:51,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:23:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 14:23:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-04-06 14:23:51,355 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) [2022-04-06 14:23:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-04-06 14:23:51,355 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2022-04-06 14:23:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:51,355 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-04-06 14:23:51,356 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) [2022-04-06 14:23:51,356 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-04-06 14:23:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 14:23:51,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:51,356 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:51,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:51,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 14:23:51,565 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:51,565 INFO L85 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 33 times [2022-04-06 14:23:51,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:51,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1950478114] [2022-04-06 14:23:51,567 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:51,567 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:51,567 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:51,567 INFO L85 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 34 times [2022-04-06 14:23:51,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:51,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901053253] [2022-04-06 14:23:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:51,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:51,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:51,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:51,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901053253] [2022-04-06 14:23:51,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901053253] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:51,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154304310] [2022-04-06 14:23:51,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:23:51,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:51,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:51,736 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:51,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 14:23:51,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:23:51,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:51,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 14:23:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:51,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:52,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154304310] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:52,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:52,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 14:23:52,273 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:52,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1950478114] [2022-04-06 14:23:52,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1950478114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:52,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:52,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 14:23:52,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945038801] [2022-04-06 14:23:52,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:52,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 14:23:52,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 14:23:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 14:23:52,274 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) [2022-04-06 14:23:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:52,497 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-04-06 14:23:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 14:23:52,497 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 [2022-04-06 14:23:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:52,498 INFO L225 Difference]: With dead ends: 56 [2022-04-06 14:23:52,498 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 14:23:52,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 14:23:52,499 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 [2022-04-06 14:23:52,499 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] [2022-04-06 14:23:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 14:23:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-06 14:23:52,503 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) [2022-04-06 14:23:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-04-06 14:23:52,504 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2022-04-06 14:23:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:52,504 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-04-06 14:23:52,504 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) [2022-04-06 14:23:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-04-06 14:23:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 14:23:52,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:52,504 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:52,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:52,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:52,707 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:52,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 35 times [2022-04-06 14:23:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:52,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1487563267] [2022-04-06 14:23:52,709 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:52,709 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:52,709 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:52,709 INFO L85 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 36 times [2022-04-06 14:23:52,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:52,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217071891] [2022-04-06 14:23:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:52,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:52,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:52,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:52,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217071891] [2022-04-06 14:23:52,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217071891] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:52,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723112855] [2022-04-06 14:23:52,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:23:52,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:52,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:52,879 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:52,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 14:23:53,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 14:23:53,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:53,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 14:23:53,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:53,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:53,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723112855] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:53,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:53,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 14:23:53,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:53,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1487563267] [2022-04-06 14:23:53,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1487563267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:53,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:53,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 14:23:53,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386968175] [2022-04-06 14:23:53,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:53,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 14:23:53,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 14:23:53,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 14:23:53,849 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) [2022-04-06 14:23:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:54,067 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-04-06 14:23:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 14:23:54,068 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 [2022-04-06 14:23:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:54,068 INFO L225 Difference]: With dead ends: 58 [2022-04-06 14:23:54,068 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 14:23:54,069 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 [2022-04-06 14:23:54,069 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:54,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 29 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:23:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 14:23:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-04-06 14:23:54,073 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) [2022-04-06 14:23:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-04-06 14:23:54,074 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2022-04-06 14:23:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:54,074 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-04-06 14:23:54,074 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) [2022-04-06 14:23:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-04-06 14:23:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 14:23:54,074 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:54,075 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:54,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:54,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:54,275 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:54,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:54,275 INFO L85 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 37 times [2022-04-06 14:23:54,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:54,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [73462189] [2022-04-06 14:23:54,277 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:54,277 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:54,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:54,277 INFO L85 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 38 times [2022-04-06 14:23:54,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:54,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551684316] [2022-04-06 14:23:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:54,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:54,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:54,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:54,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551684316] [2022-04-06 14:23:54,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551684316] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:54,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692261976] [2022-04-06 14:23:54,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:54,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:54,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:54,476 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:54,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 14:23:54,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:54,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:54,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:23:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:54,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:55,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692261976] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:55,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:55,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 14:23:55,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [73462189] [2022-04-06 14:23:55,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [73462189] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:55,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:55,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 14:23:55,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007905967] [2022-04-06 14:23:55,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:55,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 14:23:55,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 14:23:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 14:23:55,090 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) [2022-04-06 14:23:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:55,365 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-04-06 14:23:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 14:23:55,366 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 [2022-04-06 14:23:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:55,366 INFO L225 Difference]: With dead ends: 60 [2022-04-06 14:23:55,366 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 14:23:55,368 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 [2022-04-06 14:23:55,368 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-04-06 14:23:55,370 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] [2022-04-06 14:23:55,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 14:23:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-04-06 14:23:55,374 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) [2022-04-06 14:23:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-04-06 14:23:55,374 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2022-04-06 14:23:55,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:55,374 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-04-06 14:23:55,374 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) [2022-04-06 14:23:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-04-06 14:23:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 14:23:55,377 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:55,377 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:55,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:55,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:55,594 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:55,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:55,594 INFO L85 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 39 times [2022-04-06 14:23:55,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:55,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2126886595] [2022-04-06 14:23:55,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:55,596 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:55,596 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:55,596 INFO L85 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 40 times [2022-04-06 14:23:55,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:55,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001127448] [2022-04-06 14:23:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:55,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:55,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:55,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:55,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001127448] [2022-04-06 14:23:55,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001127448] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:55,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637712090] [2022-04-06 14:23:55,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:23:55,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:55,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:55,804 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:55,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 14:23:55,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:23:55,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:55,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 14:23:55,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:56,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:56,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637712090] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:56,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:56,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 14:23:56,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:56,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2126886595] [2022-04-06 14:23:56,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2126886595] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:56,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:56,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 14:23:56,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952720692] [2022-04-06 14:23:56,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:56,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 14:23:56,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:56,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 14:23:56,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 14:23:56,450 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) [2022-04-06 14:23:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:56,691 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-04-06 14:23:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 14:23:56,693 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 [2022-04-06 14:23:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:56,693 INFO L225 Difference]: With dead ends: 62 [2022-04-06 14:23:56,693 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 14:23:56,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 14:23:56,695 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:56,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:23:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 14:23:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-06 14:23:56,702 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) [2022-04-06 14:23:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-04-06 14:23:56,713 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2022-04-06 14:23:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:56,713 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-04-06 14:23:56,713 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) [2022-04-06 14:23:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-04-06 14:23:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 14:23:56,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:56,714 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:56,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:56,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 14:23:56,914 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:56,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:56,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 41 times [2022-04-06 14:23:56,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:56,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1148123312] [2022-04-06 14:23:56,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:56,916 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:56,916 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:56,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 42 times [2022-04-06 14:23:56,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:56,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736094819] [2022-04-06 14:23:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:56,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:57,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:57,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736094819] [2022-04-06 14:23:57,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736094819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134024017] [2022-04-06 14:23:57,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:23:57,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:57,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:57,157 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:57,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 14:23:57,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 14:23:57,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:57,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 14:23:57,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:57,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:58,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134024017] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:58,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:58,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 14:23:58,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:58,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1148123312] [2022-04-06 14:23:58,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1148123312] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:58,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:58,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 14:23:58,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389063702] [2022-04-06 14:23:58,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:58,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 14:23:58,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:58,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 14:23:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 14:23:58,263 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) [2022-04-06 14:23:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:58,536 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-04-06 14:23:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 14:23:58,536 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 [2022-04-06 14:23:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:58,536 INFO L225 Difference]: With dead ends: 64 [2022-04-06 14:23:58,536 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 14:23:58,538 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 [2022-04-06 14:23:58,538 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:58,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:23:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 14:23:58,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-04-06 14:23:58,543 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) [2022-04-06 14:23:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-04-06 14:23:58,543 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2022-04-06 14:23:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:58,543 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-04-06 14:23:58,543 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) [2022-04-06 14:23:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-04-06 14:23:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 14:23:58,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:58,544 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:58,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 14:23:58,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 14:23:58,755 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:58,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 43 times [2022-04-06 14:23:58,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:58,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [685695972] [2022-04-06 14:23:58,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:58,757 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:58,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 44 times [2022-04-06 14:23:58,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:58,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67285103] [2022-04-06 14:23:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:58,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:58,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:58,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:58,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67285103] [2022-04-06 14:23:58,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67285103] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:58,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087219398] [2022-04-06 14:23:58,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:58,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:58,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:58,992 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:58,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 14:23:59,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:59,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:59,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 14:23:59,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:59,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:23:59,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087219398] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:59,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:59,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 14:23:59,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:59,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [685695972] [2022-04-06 14:23:59,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [685695972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:59,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:59,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 14:23:59,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027635404] [2022-04-06 14:23:59,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:59,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 14:23:59,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:59,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 14:23:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 14:23:59,730 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) [2022-04-06 14:24:00,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:00,012 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-04-06 14:24:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 14:24:00,012 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 [2022-04-06 14:24:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:00,013 INFO L225 Difference]: With dead ends: 66 [2022-04-06 14:24:00,013 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 14:24:00,016 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 [2022-04-06 14:24:00,017 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:24:00,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 34 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:24:00,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 14:24:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-06 14:24:00,021 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) [2022-04-06 14:24:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-04-06 14:24:00,022 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2022-04-06 14:24:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:00,022 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-04-06 14:24:00,022 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) [2022-04-06 14:24:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-04-06 14:24:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 14:24:00,022 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:00,022 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:00,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 14:24:00,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:00,234 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 45 times [2022-04-06 14:24:00,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:00,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1361769395] [2022-04-06 14:24:00,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:00,237 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:00,237 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:00,237 INFO L85 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 46 times [2022-04-06 14:24:00,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:00,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817272222] [2022-04-06 14:24:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:00,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:00,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:00,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:00,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817272222] [2022-04-06 14:24:00,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817272222] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:00,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661744941] [2022-04-06 14:24:00,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:24:00,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:00,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:00,531 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:00,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 14:24:00,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:24:00,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:00,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 14:24:00,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:00,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:01,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661744941] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:01,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:01,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 14:24:01,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:01,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1361769395] [2022-04-06 14:24:01,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1361769395] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:01,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:01,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 14:24:01,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38554217] [2022-04-06 14:24:01,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:01,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 14:24:01,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:01,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 14:24:01,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:24:01,281 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) [2022-04-06 14:24:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:01,598 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-04-06 14:24:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 14:24:01,598 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 [2022-04-06 14:24:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:01,599 INFO L225 Difference]: With dead ends: 68 [2022-04-06 14:24:01,599 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 14:24:01,599 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 [2022-04-06 14:24:01,600 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 [2022-04-06 14:24:01,604 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] [2022-04-06 14:24:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 14:24:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-04-06 14:24:01,609 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) [2022-04-06 14:24:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-04-06 14:24:01,610 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2022-04-06 14:24:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:01,610 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-04-06 14:24:01,613 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) [2022-04-06 14:24:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-04-06 14:24:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 14:24:01,613 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:01,613 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:01,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 14:24:01,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:01,819 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 47 times [2022-04-06 14:24:01,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:01,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [750741358] [2022-04-06 14:24:01,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:01,821 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:01,821 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:01,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 48 times [2022-04-06 14:24:01,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:01,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502588794] [2022-04-06 14:24:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:01,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:02,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:02,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:02,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502588794] [2022-04-06 14:24:02,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502588794] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:02,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041380109] [2022-04-06 14:24:02,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:24:02,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:02,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:02,068 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:02,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 14:24:02,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-06 14:24:02,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:02,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 14:24:02,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:02,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:03,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041380109] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:03,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:03,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 14:24:03,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:03,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [750741358] [2022-04-06 14:24:03,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [750741358] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:03,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:03,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 14:24:03,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664700650] [2022-04-06 14:24:03,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:03,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 14:24:03,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:03,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 14:24:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 14:24:03,578 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) [2022-04-06 14:24:03,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:03,881 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-04-06 14:24:03,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 14:24:03,881 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 [2022-04-06 14:24:03,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:03,881 INFO L225 Difference]: With dead ends: 70 [2022-04-06 14:24:03,881 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 14:24:03,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 14:24:03,882 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:24:03,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 19 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:24:03,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 14:24:03,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 14:24:03,888 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) [2022-04-06 14:24:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-04-06 14:24:03,888 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2022-04-06 14:24:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:03,888 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-04-06 14:24:03,888 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) [2022-04-06 14:24:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-04-06 14:24:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 14:24:03,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:03,889 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:03,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:04,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 14:24:04,096 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:04,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 49 times [2022-04-06 14:24:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:04,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398054216] [2022-04-06 14:24:04,097 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:04,097 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:04,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:04,098 INFO L85 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 50 times [2022-04-06 14:24:04,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:04,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435560337] [2022-04-06 14:24:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:04,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:04,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:04,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:04,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435560337] [2022-04-06 14:24:04,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435560337] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:04,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453910560] [2022-04-06 14:24:04,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:24:04,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:04,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:04,369 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:04,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 14:24:04,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:24:04,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 14:24:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:04,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:05,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453910560] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:05,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:05,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 14:24:05,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:05,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398054216] [2022-04-06 14:24:05,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398054216] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:05,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:05,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 14:24:05,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335489658] [2022-04-06 14:24:05,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:05,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 14:24:05,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:05,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 14:24:05,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 14:24:05,254 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) [2022-04-06 14:24:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:05,588 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-04-06 14:24:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 14:24:05,588 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 [2022-04-06 14:24:05,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:05,589 INFO L225 Difference]: With dead ends: 72 [2022-04-06 14:24:05,589 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 14:24:05,590 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 [2022-04-06 14:24:05,590 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 [2022-04-06 14:24:05,590 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] [2022-04-06 14:24:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 14:24:05,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-04-06 14:24:05,596 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) [2022-04-06 14:24:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-04-06 14:24:05,596 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2022-04-06 14:24:05,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:05,596 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-04-06 14:24:05,596 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) [2022-04-06 14:24:05,596 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-04-06 14:24:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 14:24:05,597 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:05,597 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:05,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 14:24:05,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 14:24:05,797 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:05,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 51 times [2022-04-06 14:24:05,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:05,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617622954] [2022-04-06 14:24:05,799 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:05,799 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:05,799 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:05,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 52 times [2022-04-06 14:24:05,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:05,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485580304] [2022-04-06 14:24:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:05,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:06,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:06,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:06,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485580304] [2022-04-06 14:24:06,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485580304] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:06,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038501672] [2022-04-06 14:24:06,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:24:06,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:06,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:06,096 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:06,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 14:24:06,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:24:06,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:06,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 14:24:06,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:06,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:07,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038501672] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:07,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:07,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 14:24:07,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:07,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617622954] [2022-04-06 14:24:07,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617622954] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:07,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:07,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 14:24:07,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212747051] [2022-04-06 14:24:07,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:07,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 14:24:07,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:07,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 14:24:07,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 14:24:07,046 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) [2022-04-06 14:24:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:07,418 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-04-06 14:24:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 14:24:07,419 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 [2022-04-06 14:24:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:07,419 INFO L225 Difference]: With dead ends: 74 [2022-04-06 14:24:07,419 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 14:24:07,420 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 14:24:07,421 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-04-06 14:24:07,421 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] [2022-04-06 14:24:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 14:24:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-04-06 14:24:07,427 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) [2022-04-06 14:24:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-04-06 14:24:07,427 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2022-04-06 14:24:07,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:07,427 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-04-06 14:24:07,428 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) [2022-04-06 14:24:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-04-06 14:24:07,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 14:24:07,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:07,428 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:07,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:07,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 14:24:07,640 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:07,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:07,640 INFO L85 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 53 times [2022-04-06 14:24:07,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:07,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1799482378] [2022-04-06 14:24:07,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:07,641 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:07,641 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:07,641 INFO L85 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 54 times [2022-04-06 14:24:07,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:07,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617133053] [2022-04-06 14:24:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:07,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:07,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:07,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:07,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617133053] [2022-04-06 14:24:07,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617133053] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:07,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622344523] [2022-04-06 14:24:07,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:24:07,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:07,942 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:07,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 14:24:09,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-04-06 14:24:09,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:09,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 14:24:09,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:10,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:10,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622344523] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:10,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:10,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 14:24:10,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1799482378] [2022-04-06 14:24:10,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1799482378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:10,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:10,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 14:24:10,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036199834] [2022-04-06 14:24:10,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:10,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 14:24:10,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:10,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 14:24:10,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 14:24:10,743 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) [2022-04-06 14:24:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:11,108 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-04-06 14:24:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 14:24:11,109 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 [2022-04-06 14:24:11,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:11,109 INFO L225 Difference]: With dead ends: 76 [2022-04-06 14:24:11,109 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 14:24:11,111 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 [2022-04-06 14:24:11,111 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-04-06 14:24:11,111 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] [2022-04-06 14:24:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 14:24:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-04-06 14:24:11,121 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) [2022-04-06 14:24:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-04-06 14:24:11,121 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2022-04-06 14:24:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:11,121 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-04-06 14:24:11,122 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) [2022-04-06 14:24:11,122 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-04-06 14:24:11,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 14:24:11,122 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:11,122 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:11,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:11,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 14:24:11,335 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:11,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:11,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 55 times [2022-04-06 14:24:11,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:11,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [338507670] [2022-04-06 14:24:11,337 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:11,337 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:11,337 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:11,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 56 times [2022-04-06 14:24:11,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:11,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223299945] [2022-04-06 14:24:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:11,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:11,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:11,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:11,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223299945] [2022-04-06 14:24:11,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223299945] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:11,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785663032] [2022-04-06 14:24:11,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:24:11,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:11,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:11,650 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:11,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 14:24:11,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:24:11,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:11,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 14:24:11,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:11,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:12,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785663032] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:12,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:12,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 14:24:12,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:12,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [338507670] [2022-04-06 14:24:12,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [338507670] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:12,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:12,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 14:24:12,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384873542] [2022-04-06 14:24:12,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:12,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 14:24:12,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:12,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 14:24:12,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 14:24:12,681 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) [2022-04-06 14:24:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:13,114 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-04-06 14:24:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 14:24:13,114 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 [2022-04-06 14:24:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:13,114 INFO L225 Difference]: With dead ends: 78 [2022-04-06 14:24:13,115 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 14:24:13,116 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 [2022-04-06 14:24:13,116 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 [2022-04-06 14:24:13,116 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] [2022-04-06 14:24:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 14:24:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-04-06 14:24:13,123 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) [2022-04-06 14:24:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-04-06 14:24:13,123 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2022-04-06 14:24:13,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:13,123 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-04-06 14:24:13,123 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) [2022-04-06 14:24:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-04-06 14:24:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 14:24:13,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:13,124 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:13,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:13,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:13,340 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 57 times [2022-04-06 14:24:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:13,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [719107592] [2022-04-06 14:24:13,342 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:13,342 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:13,342 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:13,342 INFO L85 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 58 times [2022-04-06 14:24:13,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:13,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502422489] [2022-04-06 14:24:13,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:13,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:13,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:13,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:13,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502422489] [2022-04-06 14:24:13,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502422489] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:13,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876761884] [2022-04-06 14:24:13,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:24:13,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:13,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:13,689 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:13,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 14:24:13,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:24:13,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:13,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 14:24:13,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:13,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:14,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876761884] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:14,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:14,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 14:24:14,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:14,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [719107592] [2022-04-06 14:24:14,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [719107592] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:14,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:14,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 14:24:14,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568432992] [2022-04-06 14:24:14,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:14,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 14:24:14,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:14,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 14:24:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 14:24:14,788 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) [2022-04-06 14:24:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:15,215 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-04-06 14:24:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 14:24:15,215 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 [2022-04-06 14:24:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:15,215 INFO L225 Difference]: With dead ends: 80 [2022-04-06 14:24:15,215 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 14:24:15,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 14:24:15,217 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-04-06 14:24:15,217 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] [2022-04-06 14:24:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 14:24:15,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-04-06 14:24:15,224 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) [2022-04-06 14:24:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-04-06 14:24:15,224 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2022-04-06 14:24:15,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:15,225 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-04-06 14:24:15,225 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) [2022-04-06 14:24:15,225 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-04-06 14:24:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 14:24:15,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:15,225 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:15,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:15,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:15,431 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:15,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 59 times [2022-04-06 14:24:15,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:15,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467529498] [2022-04-06 14:24:15,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:15,432 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:15,432 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:15,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 60 times [2022-04-06 14:24:15,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:15,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133957318] [2022-04-06 14:24:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:15,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:15,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:15,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133957318] [2022-04-06 14:24:15,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133957318] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169378169] [2022-04-06 14:24:15,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:24:15,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:15,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:15,789 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:15,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 14:24:18,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-04-06 14:24:18,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:18,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 14:24:18,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:18,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:19,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169378169] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:19,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:19,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 14:24:19,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:19,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467529498] [2022-04-06 14:24:19,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467529498] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:19,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:19,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 14:24:19,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164137905] [2022-04-06 14:24:19,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:19,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 14:24:19,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:19,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 14:24:19,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 14:24:19,677 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) [2022-04-06 14:24:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:20,151 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-04-06 14:24:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 14:24:20,152 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 [2022-04-06 14:24:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:20,152 INFO L225 Difference]: With dead ends: 82 [2022-04-06 14:24:20,152 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 14:24:20,154 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 [2022-04-06 14:24:20,155 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 [2022-04-06 14:24:20,155 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] [2022-04-06 14:24:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 14:24:20,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-04-06 14:24:20,163 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) [2022-04-06 14:24:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-04-06 14:24:20,164 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2022-04-06 14:24:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:20,164 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-04-06 14:24:20,164 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) [2022-04-06 14:24:20,164 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-04-06 14:24:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 14:24:20,165 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:20,165 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:20,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:20,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 14:24:20,367 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:20,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 61 times [2022-04-06 14:24:20,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:20,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1524980294] [2022-04-06 14:24:20,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:20,369 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:20,369 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:20,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 62 times [2022-04-06 14:24:20,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:20,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205794991] [2022-04-06 14:24:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:20,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:20,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:20,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205794991] [2022-04-06 14:24:20,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205794991] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:20,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758369460] [2022-04-06 14:24:20,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:24:20,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:20,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:20,737 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:20,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 14:24:20,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:24:20,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:20,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 14:24:20,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:21,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:21,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758369460] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:21,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:21,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 14:24:21,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:21,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1524980294] [2022-04-06 14:24:21,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1524980294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:21,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:21,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 14:24:21,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551023922] [2022-04-06 14:24:21,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:21,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 14:24:21,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:21,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 14:24:21,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 14:24:21,944 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) [2022-04-06 14:24:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:22,438 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-04-06 14:24:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 14:24:22,438 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 [2022-04-06 14:24:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:22,439 INFO L225 Difference]: With dead ends: 84 [2022-04-06 14:24:22,439 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 14:24:22,440 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 [2022-04-06 14:24:22,440 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 [2022-04-06 14:24:22,440 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] [2022-04-06 14:24:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 14:24:22,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-04-06 14:24:22,448 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) [2022-04-06 14:24:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-04-06 14:24:22,448 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2022-04-06 14:24:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:22,449 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-04-06 14:24:22,449 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) [2022-04-06 14:24:22,449 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-04-06 14:24:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 14:24:22,449 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:22,449 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:22,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:22,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:22,652 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:22,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 63 times [2022-04-06 14:24:22,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:22,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [378224114] [2022-04-06 14:24:22,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:22,654 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:22,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:22,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 64 times [2022-04-06 14:24:22,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:22,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258467324] [2022-04-06 14:24:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:22,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:23,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:23,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:23,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258467324] [2022-04-06 14:24:23,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258467324] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:23,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875910323] [2022-04-06 14:24:23,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:24:23,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:23,035 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:23,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 14:24:23,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:24:23,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:23,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 14:24:23,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:23,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:24,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875910323] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:24,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:24,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 14:24:24,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:24,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [378224114] [2022-04-06 14:24:24,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [378224114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:24,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:24,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 14:24:24,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351070593] [2022-04-06 14:24:24,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:24,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 14:24:24,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:24,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 14:24:24,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 14:24:24,269 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) [2022-04-06 14:24:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:24,769 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-04-06 14:24:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 14:24:24,769 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 [2022-04-06 14:24:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:24,770 INFO L225 Difference]: With dead ends: 86 [2022-04-06 14:24:24,770 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 14:24:24,771 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 [2022-04-06 14:24:24,771 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 [2022-04-06 14:24:24,771 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] [2022-04-06 14:24:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 14:24:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-04-06 14:24:24,787 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) [2022-04-06 14:24:24,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-04-06 14:24:24,787 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2022-04-06 14:24:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:24,787 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-04-06 14:24:24,788 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) [2022-04-06 14:24:24,788 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-04-06 14:24:24,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 14:24:24,788 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:24,788 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:24,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:25,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:25,005 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:25,005 INFO L85 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 65 times [2022-04-06 14:24:25,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:25,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [72009466] [2022-04-06 14:24:25,007 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:25,007 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:25,007 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 66 times [2022-04-06 14:24:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:25,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173585894] [2022-04-06 14:24:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:25,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:25,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:25,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173585894] [2022-04-06 14:24:25,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173585894] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:25,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654799544] [2022-04-06 14:24:25,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:24:25,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:25,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:25,442 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:25,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 14:24:31,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-04-06 14:24:31,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:31,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 14:24:31,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:31,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:32,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654799544] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:32,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:32,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 14:24:32,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:32,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [72009466] [2022-04-06 14:24:32,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [72009466] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:32,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:32,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 14:24:32,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439396680] [2022-04-06 14:24:32,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:32,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 14:24:32,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:32,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 14:24:32,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 14:24:32,451 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) [2022-04-06 14:24:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:32,999 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-04-06 14:24:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 14:24:33,000 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 [2022-04-06 14:24:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:33,000 INFO L225 Difference]: With dead ends: 88 [2022-04-06 14:24:33,000 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 14:24:33,001 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 [2022-04-06 14:24:33,001 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 [2022-04-06 14:24:33,002 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] [2022-04-06 14:24:33,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 14:24:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-04-06 14:24:33,010 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) [2022-04-06 14:24:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-04-06 14:24:33,010 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2022-04-06 14:24:33,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:33,011 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-04-06 14:24:33,011 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) [2022-04-06 14:24:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-04-06 14:24:33,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 14:24:33,011 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:33,011 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:33,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:33,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 14:24:33,215 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 67 times [2022-04-06 14:24:33,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:33,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [852592856] [2022-04-06 14:24:33,217 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:33,217 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:33,217 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:33,217 INFO L85 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 68 times [2022-04-06 14:24:33,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:33,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965397312] [2022-04-06 14:24:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:33,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:33,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:33,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:33,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965397312] [2022-04-06 14:24:33,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965397312] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:33,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055212381] [2022-04-06 14:24:33,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:24:33,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:33,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:33,662 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:33,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 14:24:33,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:24:33,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:33,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 14:24:33,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:33,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:35,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055212381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:35,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:35,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 14:24:35,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:35,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [852592856] [2022-04-06 14:24:35,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [852592856] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:35,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:35,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 14:24:35,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362339576] [2022-04-06 14:24:35,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:35,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 14:24:35,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:35,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 14:24:35,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 14:24:35,048 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) [2022-04-06 14:24:35,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:35,590 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-04-06 14:24:35,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 14:24:35,590 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 [2022-04-06 14:24:35,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:35,591 INFO L225 Difference]: With dead ends: 90 [2022-04-06 14:24:35,591 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 14:24:35,592 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 [2022-04-06 14:24:35,592 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 [2022-04-06 14:24:35,593 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] [2022-04-06 14:24:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 14:24:35,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-04-06 14:24:35,602 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) [2022-04-06 14:24:35,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-04-06 14:24:35,602 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2022-04-06 14:24:35,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:35,602 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-04-06 14:24:35,602 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) [2022-04-06 14:24:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-04-06 14:24:35,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 14:24:35,603 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:35,603 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:35,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:35,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 14:24:35,815 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 69 times [2022-04-06 14:24:35,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:35,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1724538718] [2022-04-06 14:24:35,817 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:35,817 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:35,817 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:35,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 70 times [2022-04-06 14:24:35,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:35,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024272645] [2022-04-06 14:24:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:35,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:36,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:36,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:36,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024272645] [2022-04-06 14:24:36,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024272645] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:36,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081484204] [2022-04-06 14:24:36,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:24:36,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:36,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:36,263 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:36,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 14:24:36,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:24:36,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:36,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 14:24:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:36,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:37,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081484204] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:37,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:37,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 14:24:37,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:37,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1724538718] [2022-04-06 14:24:37,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1724538718] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:37,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:37,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 14:24:37,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807700209] [2022-04-06 14:24:37,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:37,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 14:24:37,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:37,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 14:24:37,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 14:24:37,693 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) [2022-04-06 14:24:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:38,265 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-04-06 14:24:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 14:24:38,266 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 [2022-04-06 14:24:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:38,266 INFO L225 Difference]: With dead ends: 92 [2022-04-06 14:24:38,266 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 14:24:38,268 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 [2022-04-06 14:24:38,268 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 [2022-04-06 14:24:38,268 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] [2022-04-06 14:24:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 14:24:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-04-06 14:24:38,278 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) [2022-04-06 14:24:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-04-06 14:24:38,278 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2022-04-06 14:24:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:38,278 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-04-06 14:24:38,278 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) [2022-04-06 14:24:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-04-06 14:24:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 14:24:38,279 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:38,279 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:38,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 14:24:38,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 14:24:38,492 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 71 times [2022-04-06 14:24:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:38,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1995523901] [2022-04-06 14:24:38,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:38,493 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:38,493 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 72 times [2022-04-06 14:24:38,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:38,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277724367] [2022-04-06 14:24:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:38,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:38,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:38,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277724367] [2022-04-06 14:24:38,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277724367] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:38,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705994141] [2022-04-06 14:24:38,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:24:38,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:38,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:38,968 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:38,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 14:24:49,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-04-06 14:24:49,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:49,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 14:24:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:49,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:50,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705994141] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:50,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:50,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 14:24:50,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:50,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1995523901] [2022-04-06 14:24:50,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1995523901] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:50,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:50,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 14:24:50,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273450533] [2022-04-06 14:24:50,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:50,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 14:24:50,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 14:24:50,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 14:24:50,991 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) [2022-04-06 14:24:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:51,599 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-04-06 14:24:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 14:24:51,600 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 [2022-04-06 14:24:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:51,600 INFO L225 Difference]: With dead ends: 94 [2022-04-06 14:24:51,600 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 14:24:51,601 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 [2022-04-06 14:24:51,601 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 [2022-04-06 14:24:51,602 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] [2022-04-06 14:24:51,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 14:24:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-04-06 14:24:51,614 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) [2022-04-06 14:24:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-04-06 14:24:51,615 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2022-04-06 14:24:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:51,615 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-04-06 14:24:51,615 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) [2022-04-06 14:24:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-04-06 14:24:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 14:24:51,615 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:51,615 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:51,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:51,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:51,816 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:51,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 73 times [2022-04-06 14:24:51,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:51,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1435709162] [2022-04-06 14:24:51,818 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:51,818 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:51,818 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:51,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 74 times [2022-04-06 14:24:51,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:51,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173617906] [2022-04-06 14:24:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:51,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:52,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:52,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173617906] [2022-04-06 14:24:52,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173617906] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372212460] [2022-04-06 14:24:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:24:52,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:52,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:52,291 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:52,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 14:24:52,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:24:52,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:52,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 14:24:52,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:52,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:53,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372212460] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:53,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:53,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 14:24:53,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:53,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1435709162] [2022-04-06 14:24:53,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1435709162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:53,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:53,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 14:24:53,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018802499] [2022-04-06 14:24:53,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:53,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 14:24:53,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:53,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 14:24:53,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 14:24:53,989 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) [2022-04-06 14:24:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:54,622 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-04-06 14:24:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 14:24:54,623 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 [2022-04-06 14:24:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:54,623 INFO L225 Difference]: With dead ends: 96 [2022-04-06 14:24:54,623 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 14:24:54,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 14:24:54,625 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 [2022-04-06 14:24:54,625 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] [2022-04-06 14:24:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 14:24:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-04-06 14:24:54,636 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) [2022-04-06 14:24:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-04-06 14:24:54,636 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2022-04-06 14:24:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:54,637 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-04-06 14:24:54,637 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) [2022-04-06 14:24:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-04-06 14:24:54,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 14:24:54,637 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:54,637 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:54,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:54,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 14:24:54,846 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 75 times [2022-04-06 14:24:54,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:54,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1811186434] [2022-04-06 14:24:54,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:54,848 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:54,848 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:54,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 76 times [2022-04-06 14:24:54,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:54,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623661223] [2022-04-06 14:24:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:54,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:55,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:55,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:55,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623661223] [2022-04-06 14:24:55,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623661223] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:55,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684955187] [2022-04-06 14:24:55,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:24:55,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:55,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:55,366 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:55,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 14:24:55,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:24:55,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:55,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 14:24:55,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:55,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:57,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684955187] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:57,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:57,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 14:24:57,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:57,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1811186434] [2022-04-06 14:24:57,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1811186434] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:57,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:57,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 14:24:57,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986348896] [2022-04-06 14:24:57,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:57,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 14:24:57,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 14:24:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 14:24:57,086 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) [2022-04-06 14:24:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:57,744 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-04-06 14:24:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 14:24:57,744 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 [2022-04-06 14:24:57,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:57,745 INFO L225 Difference]: With dead ends: 98 [2022-04-06 14:24:57,745 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 14:24:57,746 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 [2022-04-06 14:24:57,746 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 [2022-04-06 14:24:57,746 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] [2022-04-06 14:24:57,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 14:24:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-04-06 14:24:57,757 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) [2022-04-06 14:24:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-04-06 14:24:57,758 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2022-04-06 14:24:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:57,758 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-04-06 14:24:57,758 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) [2022-04-06 14:24:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-04-06 14:24:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 14:24:57,758 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:57,758 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:57,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-04-06 14:24:57,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 14:24:57,959 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:57,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 77 times [2022-04-06 14:24:57,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:57,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [641627689] [2022-04-06 14:24:57,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:57,961 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:57,961 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:57,961 INFO L85 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 78 times [2022-04-06 14:24:57,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:57,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238478279] [2022-04-06 14:24:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:57,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:58,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:24:58,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:58,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238478279] [2022-04-06 14:24:58,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238478279] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:58,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245216191] [2022-04-06 14:24:58,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:24:58,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:58,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:58,494 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:58,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 14:25:07,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-04-06 14:25:07,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:25:07,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 14:25:07,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:25:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:07,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:25:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:09,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245216191] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:25:09,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:25:09,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 14:25:09,110 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:25:09,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [641627689] [2022-04-06 14:25:09,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [641627689] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:25:09,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:25:09,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 14:25:09,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380890605] [2022-04-06 14:25:09,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:25:09,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 14:25:09,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 14:25:09,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 14:25:09,112 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) [2022-04-06 14:25:09,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:25:09,802 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-04-06 14:25:09,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 14:25:09,802 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 [2022-04-06 14:25:09,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:25:09,803 INFO L225 Difference]: With dead ends: 100 [2022-04-06 14:25:09,803 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 14:25:09,805 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 [2022-04-06 14:25:09,805 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 [2022-04-06 14:25:09,805 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] [2022-04-06 14:25:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 14:25:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-04-06 14:25:09,823 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) [2022-04-06 14:25:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-04-06 14:25:09,824 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2022-04-06 14:25:09,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:25:09,824 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-04-06 14:25:09,824 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) [2022-04-06 14:25:09,824 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-04-06 14:25:09,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 14:25:09,824 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:25:09,824 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:25:09,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-06 14:25:10,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:10,039 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:25:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:25:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 79 times [2022-04-06 14:25:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:10,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1491728278] [2022-04-06 14:25:10,041 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:25:10,041 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:25:10,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:25:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 80 times [2022-04-06 14:25:10,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:25:10,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032480938] [2022-04-06 14:25:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:25:10,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:25:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:10,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:25:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:10,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:25:10,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032480938] [2022-04-06 14:25:10,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032480938] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:25:10,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590918977] [2022-04-06 14:25:10,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:25:10,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:10,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:25:10,593 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:25:10,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 14:25:10,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:25:10,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:25:10,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 14:25:10,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:25:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:10,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:25:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:12,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590918977] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:25:12,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:25:12,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 14:25:12,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:25:12,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1491728278] [2022-04-06 14:25:12,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1491728278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:25:12,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:25:12,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 14:25:12,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679050247] [2022-04-06 14:25:12,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:25:12,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 14:25:12,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:12,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 14:25:12,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 14:25:12,458 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) [2022-04-06 14:25:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:25:13,206 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-04-06 14:25:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 14:25:13,206 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 [2022-04-06 14:25:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:25:13,207 INFO L225 Difference]: With dead ends: 102 [2022-04-06 14:25:13,207 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 14:25:13,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 14:25:13,208 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 [2022-04-06 14:25:13,209 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] [2022-04-06 14:25:13,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 14:25:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-04-06 14:25:13,221 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) [2022-04-06 14:25:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-04-06 14:25:13,221 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2022-04-06 14:25:13,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:25:13,221 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-04-06 14:25:13,221 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) [2022-04-06 14:25:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-04-06 14:25:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 14:25:13,222 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:25:13,222 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:25:13,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 14:25:13,422 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 14:25:13,422 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:25:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:25:13,423 INFO L85 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 81 times [2022-04-06 14:25:13,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:13,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1623262635] [2022-04-06 14:25:13,424 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:25:13,424 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:25:13,424 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:25:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 82 times [2022-04-06 14:25:13,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:25:13,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302331297] [2022-04-06 14:25:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:25:13,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:25:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:14,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:25:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:14,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:25:14,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302331297] [2022-04-06 14:25:14,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302331297] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:25:14,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124794332] [2022-04-06 14:25:14,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:25:14,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:14,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:25:14,047 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:25:14,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 14:25:14,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:25:14,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:25:14,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 14:25:14,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:25:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:14,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:25:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:15,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124794332] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:25:15,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:25:15,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-04-06 14:25:15,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:25:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1623262635] [2022-04-06 14:25:15,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1623262635] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:25:15,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:25:15,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 14:25:15,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801819209] [2022-04-06 14:25:15,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:25:15,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 14:25:15,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:15,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 14:25:15,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 14:25:15,933 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) [2022-04-06 14:25:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:25:16,708 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-04-06 14:25:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 14:25:16,708 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 [2022-04-06 14:25:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:25:16,709 INFO L225 Difference]: With dead ends: 104 [2022-04-06 14:25:16,709 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 14:25:16,710 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7398, Invalid=9372, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 14:25:16,711 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 [2022-04-06 14:25:16,711 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] [2022-04-06 14:25:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 14:25:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-04-06 14:25:16,724 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) [2022-04-06 14:25:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-04-06 14:25:16,724 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2022-04-06 14:25:16,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:25:16,726 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-04-06 14:25:16,726 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) [2022-04-06 14:25:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-04-06 14:25:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-06 14:25:16,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:25:16,727 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:25:16,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 14:25:16,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:16,945 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:25:16,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:25:16,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 83 times [2022-04-06 14:25:16,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:16,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [241780543] [2022-04-06 14:25:16,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:25:16,948 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:25:16,948 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:25:16,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 84 times [2022-04-06 14:25:16,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:25:16,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529589624] [2022-04-06 14:25:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:25:16,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:25:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:25:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:17,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:25:17,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529589624] [2022-04-06 14:25:17,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529589624] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:25:17,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250954836] [2022-04-06 14:25:17,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:25:17,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:25:17,615 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:25:17,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 14:25:30,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-04-06 14:25:30,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:25:30,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 14:25:30,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:25:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:31,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:25:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:32,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250954836] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:25:32,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:25:32,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 14:25:32,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:25:32,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [241780543] [2022-04-06 14:25:32,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [241780543] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:25:32,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:25:32,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 14:25:32,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395016364] [2022-04-06 14:25:32,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:25:32,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 14:25:32,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:32,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 14:25:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 14:25:32,692 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) [2022-04-06 14:25:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:25:33,462 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-04-06 14:25:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 14:25:33,463 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 [2022-04-06 14:25:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:25:33,463 INFO L225 Difference]: With dead ends: 106 [2022-04-06 14:25:33,464 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 14:25:33,465 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 [2022-04-06 14:25:33,465 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 [2022-04-06 14:25:33,465 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] [2022-04-06 14:25:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 14:25:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-04-06 14:25:33,478 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) [2022-04-06 14:25:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-04-06 14:25:33,478 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2022-04-06 14:25:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:25:33,479 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-04-06 14:25:33,479 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) [2022-04-06 14:25:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-04-06 14:25:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 14:25:33,479 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:25:33,479 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:25:33,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-04-06 14:25:33,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:33,695 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:25:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:25:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 85 times [2022-04-06 14:25:33,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:33,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1861771919] [2022-04-06 14:25:33,697 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:25:33,697 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:25:33,698 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:25:33,698 INFO L85 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 86 times [2022-04-06 14:25:33,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:25:33,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520587120] [2022-04-06 14:25:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:25:33,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:25:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:34,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:25:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:34,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:25:34,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520587120] [2022-04-06 14:25:34,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520587120] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:25:34,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293568376] [2022-04-06 14:25:34,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:25:34,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:34,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:25:34,340 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:25:34,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 14:25:34,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:25:34,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:25:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 14:25:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:25:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:34,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:25:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:36,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293568376] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:25:36,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:25:36,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 14:25:36,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:25:36,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1861771919] [2022-04-06 14:25:36,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1861771919] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:25:36,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:25:36,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 14:25:36,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678472105] [2022-04-06 14:25:36,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:25:36,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 14:25:36,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:36,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 14:25:36,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 14:25:36,456 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) [2022-04-06 14:25:37,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:25:37,284 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-04-06 14:25:37,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 14:25:37,284 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 [2022-04-06 14:25:37,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:25:37,284 INFO L225 Difference]: With dead ends: 108 [2022-04-06 14:25:37,284 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 14:25:37,285 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 [2022-04-06 14:25:37,285 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 [2022-04-06 14:25:37,286 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] [2022-04-06 14:25:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 14:25:37,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-04-06 14:25:37,298 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) [2022-04-06 14:25:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-04-06 14:25:37,299 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2022-04-06 14:25:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:25:37,299 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-04-06 14:25:37,299 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) [2022-04-06 14:25:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-04-06 14:25:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 14:25:37,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:25:37,300 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:25:37,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 14:25:37,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 14:25:37,517 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:25:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:25:37,518 INFO L85 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 87 times [2022-04-06 14:25:37,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:37,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2076737824] [2022-04-06 14:25:37,519 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:25:37,519 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:25:37,519 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:25:37,519 INFO L85 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 88 times [2022-04-06 14:25:37,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:25:37,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644666796] [2022-04-06 14:25:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:25:37,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:25:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:38,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:25:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:38,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:25:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644666796] [2022-04-06 14:25:38,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644666796] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:25:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477167645] [2022-04-06 14:25:38,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:25:38,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:38,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:25:38,176 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:25:38,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 14:25:38,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:25:38,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:25:38,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 14:25:38,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:25:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:38,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:25:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:40,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477167645] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:25:40,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:25:40,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-04-06 14:25:40,300 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:25:40,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2076737824] [2022-04-06 14:25:40,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2076737824] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:25:40,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:25:40,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 14:25:40,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660336455] [2022-04-06 14:25:40,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:25:40,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 14:25:40,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:40,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 14:25:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 14:25:40,302 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) [2022-04-06 14:25:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:25:41,196 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-04-06 14:25:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 14:25:41,197 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 [2022-04-06 14:25:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:25:41,197 INFO L225 Difference]: With dead ends: 110 [2022-04-06 14:25:41,197 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 14:25:41,198 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 [2022-04-06 14:25:41,198 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 [2022-04-06 14:25:41,199 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] [2022-04-06 14:25:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 14:25:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-04-06 14:25:41,214 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) [2022-04-06 14:25:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-04-06 14:25:41,214 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2022-04-06 14:25:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:25:41,214 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-04-06 14:25:41,215 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) [2022-04-06 14:25:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-04-06 14:25:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:25:41,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:25:41,215 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:25:41,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 14:25:41,431 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 [2022-04-06 14:25:41,432 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:25:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:25:41,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 89 times [2022-04-06 14:25:41,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:41,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78419818] [2022-04-06 14:25:41,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:25:41,433 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:25:41,433 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:25:41,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 90 times [2022-04-06 14:25:41,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:25:41,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36380878] [2022-04-06 14:25:41,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:25:41,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:25:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:42,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:25:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:25:42,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:25:42,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36380878] [2022-04-06 14:25:42,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36380878] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:25:42,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536803663] [2022-04-06 14:25:42,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:25:42,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:42,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:25:42,122 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:25:42,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 14:26:08,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-04-06 14:26:08,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:08,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 14:26:08,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:08,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:26:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:10,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536803663] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:26:10,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:26:10,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-04-06 14:26:10,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:26:10,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78419818] [2022-04-06 14:26:10,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78419818] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:26:10,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:26:10,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 14:26:10,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969748665] [2022-04-06 14:26:10,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:26:10,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 14:26:10,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:10,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 14:26:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 14:26:10,148 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) [2022-04-06 14:26:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:26:11,005 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-04-06 14:26:11,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 14:26:11,007 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 [2022-04-06 14:26:11,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:26:11,010 INFO L225 Difference]: With dead ends: 112 [2022-04-06 14:26:11,010 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 14:26:11,011 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 [2022-04-06 14:26:11,011 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 [2022-04-06 14:26:11,012 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] [2022-04-06 14:26:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 14:26:11,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-04-06 14:26:11,046 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) [2022-04-06 14:26:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-04-06 14:26:11,047 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2022-04-06 14:26:11,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:26:11,047 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-04-06 14:26:11,047 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) [2022-04-06 14:26:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-04-06 14:26:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 14:26:11,047 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:26:11,047 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:26:11,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 14:26:11,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 14:26:11,263 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:26:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:26:11,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 91 times [2022-04-06 14:26:11,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:11,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611052838] [2022-04-06 14:26:11,265 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:26:11,266 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:26:11,266 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:26:11,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 92 times [2022-04-06 14:26:11,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:26:11,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721974653] [2022-04-06 14:26:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:26:11,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:26:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:11,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:26:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:11,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:26:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721974653] [2022-04-06 14:26:11,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721974653] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:26:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788652168] [2022-04-06 14:26:11,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:26:11,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:11,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:26:11,963 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:26:11,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 14:26:12,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:26:12,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 14:26:12,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:12,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:26:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:14,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788652168] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:26:14,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:26:14,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-04-06 14:26:14,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:26:14,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [611052838] [2022-04-06 14:26:14,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [611052838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:26:14,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:26:14,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 14:26:14,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766290222] [2022-04-06 14:26:14,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:26:14,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 14:26:14,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:14,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 14:26:14,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 14:26:14,243 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) [2022-04-06 14:26:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:26:15,143 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-04-06 14:26:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 14:26:15,143 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 [2022-04-06 14:26:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:26:15,143 INFO L225 Difference]: With dead ends: 114 [2022-04-06 14:26:15,144 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 14:26:15,145 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 14:26:15,145 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 [2022-04-06 14:26:15,145 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] [2022-04-06 14:26:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 14:26:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-04-06 14:26:15,160 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) [2022-04-06 14:26:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-04-06 14:26:15,160 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2022-04-06 14:26:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:26:15,160 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-04-06 14:26:15,160 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) [2022-04-06 14:26:15,161 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-04-06 14:26:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 14:26:15,161 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:26:15,161 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:26:15,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-06 14:26:15,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:15,365 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:26:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:26:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 93 times [2022-04-06 14:26:15,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:15,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560341730] [2022-04-06 14:26:15,367 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:26:15,367 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:26:15,367 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:26:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 94 times [2022-04-06 14:26:15,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:26:15,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910162662] [2022-04-06 14:26:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:26:15,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:26:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:16,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:26:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:16,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:26:16,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910162662] [2022-04-06 14:26:16,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910162662] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:26:16,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257329385] [2022-04-06 14:26:16,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:26:16,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:16,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:26:16,118 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:26:16,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 14:26:16,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:26:16,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:16,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 14:26:16,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:16,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:26:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:18,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257329385] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:26:18,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:26:18,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-04-06 14:26:18,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:26:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560341730] [2022-04-06 14:26:18,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560341730] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:26:18,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:26:18,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 14:26:18,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547913813] [2022-04-06 14:26:18,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:26:18,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 14:26:18,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:18,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 14:26:18,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 14:26:18,488 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) [2022-04-06 14:26:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:26:19,421 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-04-06 14:26:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 14:26:19,421 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 [2022-04-06 14:26:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:26:19,422 INFO L225 Difference]: With dead ends: 116 [2022-04-06 14:26:19,422 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 14:26:19,423 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 [2022-04-06 14:26:19,423 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 [2022-04-06 14:26:19,423 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] [2022-04-06 14:26:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 14:26:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-04-06 14:26:19,439 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) [2022-04-06 14:26:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-04-06 14:26:19,439 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2022-04-06 14:26:19,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:26:19,439 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-04-06 14:26:19,440 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) [2022-04-06 14:26:19,440 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-04-06 14:26:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 14:26:19,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:26:19,440 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:26:19,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 14:26:19,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 14:26:19,655 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:26:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:26:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 95 times [2022-04-06 14:26:19,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:19,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2037038722] [2022-04-06 14:26:19,657 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:26:19,657 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:26:19,657 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:26:19,657 INFO L85 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 96 times [2022-04-06 14:26:19,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:26:19,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567430562] [2022-04-06 14:26:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:26:19,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:26:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:20,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:26:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:20,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:26:20,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567430562] [2022-04-06 14:26:20,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567430562] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:26:20,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544950187] [2022-04-06 14:26:20,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:26:20,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:20,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:26:20,430 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:26:20,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 14:26:53,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-04-06 14:26:53,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:53,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 14:26:53,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:53,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:26:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:55,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544950187] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:26:55,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:26:55,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 14:26:55,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:26:55,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2037038722] [2022-04-06 14:26:55,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2037038722] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:26:55,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:26:55,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 14:26:55,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534817468] [2022-04-06 14:26:55,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:26:55,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 14:26:55,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:55,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 14:26:55,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 14:26:55,905 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) [2022-04-06 14:26:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:26:56,863 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-04-06 14:26:56,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 14:26:56,863 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 [2022-04-06 14:26:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:26:56,864 INFO L225 Difference]: With dead ends: 118 [2022-04-06 14:26:56,864 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 14:26:56,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 14:26:56,866 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 [2022-04-06 14:26:56,866 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] [2022-04-06 14:26:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 14:26:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-04-06 14:26:56,882 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) [2022-04-06 14:26:56,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2022-04-06 14:26:56,883 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2022-04-06 14:26:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:26:56,883 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2022-04-06 14:26:56,883 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) [2022-04-06 14:26:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2022-04-06 14:26:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 14:26:56,883 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:26:56,883 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:26:56,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 14:26:57,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 14:26:57,086 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:26:57,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:26:57,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 97 times [2022-04-06 14:26:57,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:57,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806512197] [2022-04-06 14:26:57,088 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:26:57,088 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:26:57,088 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:26:57,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 98 times [2022-04-06 14:26:57,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:26:57,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485969971] [2022-04-06 14:26:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:26:57,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:26:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:57,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:26:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:57,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:26:57,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485969971] [2022-04-06 14:26:57,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485969971] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:26:57,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812198037] [2022-04-06 14:26:57,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:26:57,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:57,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:26:57,859 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:26:57,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 14:26:58,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:26:58,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:58,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 14:26:58,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:26:58,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:27:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:27:00,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812198037] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:27:00,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:27:00,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-04-06 14:27:00,398 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:27:00,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806512197] [2022-04-06 14:27:00,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806512197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:27:00,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:27:00,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 14:27:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664433914] [2022-04-06 14:27:00,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:27:00,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 14:27:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:27:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 14:27:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 14:27:00,400 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) [2022-04-06 14:27:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:27:01,415 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-04-06 14:27:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 14:27:01,416 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 [2022-04-06 14:27:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:27:01,416 INFO L225 Difference]: With dead ends: 120 [2022-04-06 14:27:01,416 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 14:27:01,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 14:27:01,417 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 [2022-04-06 14:27:01,418 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] [2022-04-06 14:27:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 14:27:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2022-04-06 14:27:01,434 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) [2022-04-06 14:27:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-04-06 14:27:01,435 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2022-04-06 14:27:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:27:01,435 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-04-06 14:27:01,435 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) [2022-04-06 14:27:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-04-06 14:27:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-04-06 14:27:01,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:27:01,436 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:27:01,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 14:27:01,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:27:01,640 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:27:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:27:01,640 INFO L85 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 99 times [2022-04-06 14:27:01,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:27:01,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1442185669] [2022-04-06 14:27:01,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:27:01,641 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:27:01,641 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:27:01,641 INFO L85 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 100 times [2022-04-06 14:27:01,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:27:01,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427238619] [2022-04-06 14:27:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:27:01,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:27:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:27:02,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:27:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:27:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:27:02,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:27:02,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427238619] [2022-04-06 14:27:02,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427238619] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:27:02,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778240053] [2022-04-06 14:27:02,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:27:02,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:27:02,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:27:02,459 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:27:02,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 14:27:02,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:27:02,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:27:02,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 14:27:02,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:27:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:27:02,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:27:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:27:05,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778240053] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:27:05,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:27:05,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-04-06 14:27:05,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:27:05,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1442185669] [2022-04-06 14:27:05,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1442185669] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:27:05,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:27:05,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 14:27:05,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868922416] [2022-04-06 14:27:05,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:27:05,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 14:27:05,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:27:05,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 14:27:05,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 14:27:05,093 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) [2022-04-06 14:27:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:27:06,129 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-04-06 14:27:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 14:27:06,129 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 [2022-04-06 14:27:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:27:06,130 INFO L225 Difference]: With dead ends: 122 [2022-04-06 14:27:06,130 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 14:27:06,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10818, Invalid=13674, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 14:27:06,136 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 [2022-04-06 14:27:06,136 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] [2022-04-06 14:27:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 14:27:06,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-04-06 14:27:06,153 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) [2022-04-06 14:27:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2022-04-06 14:27:06,153 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2022-04-06 14:27:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:27:06,153 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2022-04-06 14:27:06,154 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) [2022-04-06 14:27:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2022-04-06 14:27:06,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 14:27:06,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:27:06,154 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:27:06,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 14:27:06,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 14:27:06,355 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:27:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:27:06,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 101 times [2022-04-06 14:27:06,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:27:06,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674138947] [2022-04-06 14:27:06,356 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:27:06,356 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:27:06,356 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:27:06,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 102 times [2022-04-06 14:27:06,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:27:06,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960939807] [2022-04-06 14:27:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:27:06,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:27:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:27:07,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:27:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:27:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:27:07,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:27:07,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960939807] [2022-04-06 14:27:07,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960939807] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:27:07,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041298752] [2022-04-06 14:27:07,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:27:07,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:27:07,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:27:07,208 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:27:07,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 14:28:00,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-04-06 14:28:00,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:28:00,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 14:28:00,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:28:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:28:01,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:28:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:28:03,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041298752] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:28:03,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:28:03,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-04-06 14:28:03,383 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:28:03,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674138947] [2022-04-06 14:28:03,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674138947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:28:03,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:28:03,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 14:28:03,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774963776] [2022-04-06 14:28:03,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:28:03,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 14:28:03,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 14:28:03,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 14:28:03,385 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) [2022-04-06 14:28:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:28:04,457 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-04-06 14:28:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 14:28:04,457 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 [2022-04-06 14:28:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:28:04,458 INFO L225 Difference]: With dead ends: 124 [2022-04-06 14:28:04,458 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 14:28:04,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 14:28:04,461 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 [2022-04-06 14:28:04,461 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] [2022-04-06 14:28:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 14:28:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-04-06 14:28:04,485 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) [2022-04-06 14:28:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-04-06 14:28:04,486 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2022-04-06 14:28:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:28:04,486 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-04-06 14:28:04,486 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) [2022-04-06 14:28:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-04-06 14:28:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 14:28:04,486 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:28:04,486 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:28:04,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 14:28:04,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:28:04,687 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:28:04,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:28:04,687 INFO L85 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 103 times [2022-04-06 14:28:04,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:04,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [870236425] [2022-04-06 14:28:04,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:28:04,689 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:28:04,689 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:28:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 104 times [2022-04-06 14:28:04,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:28:04,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717275923] [2022-04-06 14:28:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:28:04,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:28:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:05,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:28:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:28:05,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:28:05,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717275923] [2022-04-06 14:28:05,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717275923] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:28:05,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907370066] [2022-04-06 14:28:05,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:28:05,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:28:05,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:28:05,568 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:28:05,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 14:28:05,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:28:05,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:28:05,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 14:28:05,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:28:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:28:06,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:28:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:28:08,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907370066] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:28:08,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:28:08,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-04-06 14:28:08,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:28:08,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [870236425] [2022-04-06 14:28:08,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [870236425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:28:08,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:28:08,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 14:28:08,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789000266] [2022-04-06 14:28:08,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:28:08,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 14:28:08,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:08,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 14:28:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 14:28:08,475 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) [2022-04-06 14:28:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:28:09,593 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-04-06 14:28:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 14:28:09,594 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 [2022-04-06 14:28:09,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:28:09,594 INFO L225 Difference]: With dead ends: 126 [2022-04-06 14:28:09,594 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 14:28:09,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 14:28:09,596 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 [2022-04-06 14:28:09,596 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] [2022-04-06 14:28:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 14:28:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-04-06 14:28:09,614 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) [2022-04-06 14:28:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-04-06 14:28:09,615 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2022-04-06 14:28:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:28:09,615 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-04-06 14:28:09,615 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) [2022-04-06 14:28:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-04-06 14:28:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 14:28:09,615 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:28:09,616 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:28:09,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 14:28:09,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 14:28:09,816 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:28:09,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:28:09,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 105 times [2022-04-06 14:28:09,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:09,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [834199117] [2022-04-06 14:28:09,818 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:28:09,818 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:28:09,818 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:28:09,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 106 times [2022-04-06 14:28:09,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:28:09,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167869049] [2022-04-06 14:28:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:28:09,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:28:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:10,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:28:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:28:10,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:28:10,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167869049] [2022-04-06 14:28:10,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167869049] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:28:10,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340958756] [2022-04-06 14:28:10,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:28:10,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:28:10,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:28:10,711 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:28:10,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 14:28:11,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:28:11,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:28:11,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 14:28:11,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:28:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:28:11,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:28:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:28:13,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340958756] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:28:13,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:28:13,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-04-06 14:28:13,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:28:13,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [834199117] [2022-04-06 14:28:13,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [834199117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:28:13,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:28:13,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 14:28:13,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993052108] [2022-04-06 14:28:13,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:28:13,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 14:28:13,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:13,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 14:28:13,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 14:28:13,680 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) [2022-04-06 14:28:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:28:14,823 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-04-06 14:28:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 14:28:14,824 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 [2022-04-06 14:28:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:28:14,824 INFO L225 Difference]: With dead ends: 128 [2022-04-06 14:28:14,824 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 14:28:14,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12102, Invalid=15288, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 14:28:14,826 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 [2022-04-06 14:28:14,826 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] [2022-04-06 14:28:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 14:28:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-04-06 14:28:14,845 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) [2022-04-06 14:28:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2022-04-06 14:28:14,845 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2022-04-06 14:28:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:28:14,845 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2022-04-06 14:28:14,845 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) [2022-04-06 14:28:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2022-04-06 14:28:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-04-06 14:28:14,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:28:14,846 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:28:14,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 14:28:15,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 14:28:15,052 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:28:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:28:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 107 times [2022-04-06 14:28:15,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:15,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954526694] [2022-04-06 14:28:15,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:28:15,054 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:28:15,054 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:28:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 108 times [2022-04-06 14:28:15,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:28:15,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977504235] [2022-04-06 14:28:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:28:15,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:28:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:15,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:28:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:28:15,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:28:15,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977504235] [2022-04-06 14:28:15,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977504235] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:28:15,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514882009] [2022-04-06 14:28:15,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:28:15,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:28:15,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:28:15,996 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:28:15,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 14:29:07,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-04-06 14:29:07,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:29:07,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 14:29:07,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:29:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:29:08,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:29:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:29:10,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514882009] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:29:10,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:29:10,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-04-06 14:29:10,562 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:29:10,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954526694] [2022-04-06 14:29:10,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954526694] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:29:10,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:29:10,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 14:29:10,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937585528] [2022-04-06 14:29:10,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:29:10,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 14:29:10,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 14:29:10,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 14:29:10,565 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) [2022-04-06 14:29:11,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:29:11,777 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-04-06 14:29:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 14:29:11,777 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 [2022-04-06 14:29:11,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:29:11,778 INFO L225 Difference]: With dead ends: 130 [2022-04-06 14:29:11,778 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 14:29:11,779 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 [2022-04-06 14:29:11,779 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 [2022-04-06 14:29:11,779 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] [2022-04-06 14:29:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 14:29:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-04-06 14:29:11,798 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) [2022-04-06 14:29:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2022-04-06 14:29:11,798 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2022-04-06 14:29:11,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:29:11,799 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2022-04-06 14:29:11,799 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) [2022-04-06 14:29:11,799 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2022-04-06 14:29:11,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 14:29:11,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:29:11,799 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:29:11,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 14:29:12,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:29:12,001 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:29:12,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:29:12,001 INFO L85 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 109 times [2022-04-06 14:29:12,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:12,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1803039767] [2022-04-06 14:29:12,004 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:29:12,004 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:29:12,004 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:29:12,004 INFO L85 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 110 times [2022-04-06 14:29:12,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:29:12,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570551085] [2022-04-06 14:29:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:29:12,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:29:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:12,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:29:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:29:12,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:29:12,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570551085] [2022-04-06 14:29:12,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570551085] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:29:12,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025326277] [2022-04-06 14:29:12,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:29:12,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:29:12,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:29:12,940 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:29:12,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 14:29:13,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:29:13,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:29:13,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 14:29:13,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:29:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:29:13,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:29:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:29:16,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025326277] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:29:16,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:29:16,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-04-06 14:29:16,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:29:16,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1803039767] [2022-04-06 14:29:16,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1803039767] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:29:16,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:29:16,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 14:29:16,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007401054] [2022-04-06 14:29:16,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:29:16,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 14:29:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:16,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 14:29:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 14:29:16,141 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) [2022-04-06 14:29:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:29:17,337 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-04-06 14:29:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 14:29:17,338 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 [2022-04-06 14:29:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:29:17,338 INFO L225 Difference]: With dead ends: 132 [2022-04-06 14:29:17,338 INFO L226 Difference]: Without dead ends: 126 [2022-04-06 14:29:17,341 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 [2022-04-06 14:29:17,341 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 [2022-04-06 14:29:17,341 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] [2022-04-06 14:29:17,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-06 14:29:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-04-06 14:29:17,382 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) [2022-04-06 14:29:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2022-04-06 14:29:17,382 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2022-04-06 14:29:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:29:17,382 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2022-04-06 14:29:17,382 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) [2022-04-06 14:29:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2022-04-06 14:29:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 14:29:17,383 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:29:17,383 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:29:17,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 14:29:17,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:29:17,583 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:29:17,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:29:17,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 111 times [2022-04-06 14:29:17,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:17,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1739750743] [2022-04-06 14:29:17,585 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:29:17,585 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:29:17,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:29:17,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 112 times [2022-04-06 14:29:17,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:29:17,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703930579] [2022-04-06 14:29:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:29:17,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:29:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:18,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:29:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:29:18,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:29:18,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703930579] [2022-04-06 14:29:18,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703930579] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:29:18,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963705156] [2022-04-06 14:29:18,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:29:18,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:29:18,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:29:18,531 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:29:18,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 14:29:18,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:29:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:29:18,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 14:29:18,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:29:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:29:19,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:29:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:29:21,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963705156] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:29:21,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:29:21,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-04-06 14:29:21,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:29:21,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1739750743] [2022-04-06 14:29:21,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1739750743] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:29:21,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:29:21,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 14:29:21,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422253387] [2022-04-06 14:29:21,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:29:21,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 14:29:21,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:21,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 14:29:21,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 14:29:21,794 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) [2022-04-06 14:29:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:29:22,984 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-04-06 14:29:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 14:29:22,985 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 [2022-04-06 14:29:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:29:22,985 INFO L225 Difference]: With dead ends: 134 [2022-04-06 14:29:22,985 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 14:29:22,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13458, Invalid=16992, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 14:29:22,988 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 [2022-04-06 14:29:22,988 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] [2022-04-06 14:29:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 14:29:23,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-04-06 14:29:23,016 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) [2022-04-06 14:29:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2022-04-06 14:29:23,016 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2022-04-06 14:29:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:29:23,016 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2022-04-06 14:29:23,016 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) [2022-04-06 14:29:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2022-04-06 14:29:23,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-04-06 14:29:23,017 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:29:23,017 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:29:23,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-06 14:29:23,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:29:23,217 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:29:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:29:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 113 times [2022-04-06 14:29:23,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:23,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806199776] [2022-04-06 14:29:23,218 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:29:23,218 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:29:23,219 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:29:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 114 times [2022-04-06 14:29:23,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:29:23,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908665604] [2022-04-06 14:29:23,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:29:23,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:29:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:24,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:29:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:29:24,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:29:24,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908665604] [2022-04-06 14:29:24,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908665604] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:29:24,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138353432] [2022-04-06 14:29:24,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:29:24,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:29:24,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:29:24,219 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:29:24,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 14:30:51,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-04-06 14:30:51,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:30:51,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 14:30:51,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:30:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:30:51,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:30:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:30:54,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138353432] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:30:54,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:30:54,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-04-06 14:30:54,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:30:54,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806199776] [2022-04-06 14:30:54,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806199776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:30:54,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:30:54,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 14:30:54,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031855573] [2022-04-06 14:30:54,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:30:54,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 14:30:54,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:54,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 14:30:54,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 14:30:54,561 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) [2022-04-06 14:30:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:30:55,870 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-04-06 14:30:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 14:30:55,870 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 [2022-04-06 14:30:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:30:55,879 INFO L225 Difference]: With dead ends: 136 [2022-04-06 14:30:55,879 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 14:30:55,880 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 [2022-04-06 14:30:55,880 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 [2022-04-06 14:30:55,880 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] [2022-04-06 14:30:55,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 14:30:55,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-04-06 14:30:55,901 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) [2022-04-06 14:30:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-04-06 14:30:55,902 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2022-04-06 14:30:55,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:30:55,902 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-04-06 14:30:55,902 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) [2022-04-06 14:30:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-04-06 14:30:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 14:30:55,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:30:55,902 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:30:55,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 14:30:56,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 14:30:56,111 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:30:56,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:30:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 115 times [2022-04-06 14:30:56,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:56,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472678716] [2022-04-06 14:30:56,113 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:30:56,113 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:30:56,113 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:30:56,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 116 times [2022-04-06 14:30:56,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:30:56,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596244542] [2022-04-06 14:30:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:30:56,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:30:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:57,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:30:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:30:57,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:30:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596244542] [2022-04-06 14:30:57,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596244542] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:30:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996485082] [2022-04-06 14:30:57,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:30:57,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:30:57,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:30:57,161 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:30:57,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 14:30:57,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:30:57,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:30:57,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 14:30:57,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:30:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:30:57,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:31:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:31:00,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996485082] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:31:00,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:31:00,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-04-06 14:31:00,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:31:00,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472678716] [2022-04-06 14:31:00,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472678716] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:31:00,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:31:00,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 14:31:00,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866880453] [2022-04-06 14:31:00,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:31:00,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 14:31:00,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:31:00,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 14:31:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 14:31:00,584 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) [2022-04-06 14:31:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:31:01,924 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-04-06 14:31:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 14:31:01,925 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 [2022-04-06 14:31:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:31:01,925 INFO L225 Difference]: With dead ends: 138 [2022-04-06 14:31:01,925 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 14:31:01,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 14:31:01,927 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 [2022-04-06 14:31:01,927 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] [2022-04-06 14:31:01,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 14:31:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-04-06 14:31:01,948 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) [2022-04-06 14:31:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2022-04-06 14:31:01,949 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2022-04-06 14:31:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:31:01,949 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2022-04-06 14:31:01,949 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) [2022-04-06 14:31:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2022-04-06 14:31:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-04-06 14:31:01,950 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:31:01,950 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:31:01,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 14:31:02,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 14:31:02,150 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:31:02,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:31:02,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 117 times [2022-04-06 14:31:02,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:31:02,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [147596487] [2022-04-06 14:31:02,152 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:31:02,152 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:31:02,152 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:31:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 118 times [2022-04-06 14:31:02,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:31:02,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133430762] [2022-04-06 14:31:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:31:02,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:31:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:03,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:31:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:31:03,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:31:03,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133430762] [2022-04-06 14:31:03,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133430762] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:31:03,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749597020] [2022-04-06 14:31:03,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:31:03,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:31:03,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:31:03,207 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:31:03,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 14:31:03,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:31:03,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:31:03,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 14:31:03,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:31:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:31:03,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:31:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:31:06,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749597020] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:31:06,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:31:06,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-04-06 14:31:06,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:31:06,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [147596487] [2022-04-06 14:31:06,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [147596487] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:31:06,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:31:06,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 14:31:06,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305451546] [2022-04-06 14:31:06,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:31:06,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 14:31:06,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:31:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 14:31:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 14:31:06,744 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) [2022-04-06 14:31:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:31:08,118 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-04-06 14:31:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 14:31:08,118 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 [2022-04-06 14:31:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:31:08,119 INFO L225 Difference]: With dead ends: 140 [2022-04-06 14:31:08,119 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 14:31:08,120 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 [2022-04-06 14:31:08,121 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 [2022-04-06 14:31:08,121 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] [2022-04-06 14:31:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 14:31:08,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-04-06 14:31:08,143 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) [2022-04-06 14:31:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2022-04-06 14:31:08,143 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2022-04-06 14:31:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:31:08,144 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2022-04-06 14:31:08,144 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) [2022-04-06 14:31:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2022-04-06 14:31:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 14:31:08,144 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:31:08,144 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:31:08,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 14:31:08,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:31:08,356 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:31:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:31:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 119 times [2022-04-06 14:31:08,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:31:08,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [307915231] [2022-04-06 14:31:08,357 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:31:08,357 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:31:08,358 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:31:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 120 times [2022-04-06 14:31:08,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:31:08,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647419452] [2022-04-06 14:31:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:31:08,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:31:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:09,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:31:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:31:09,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:31:09,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647419452] [2022-04-06 14:31:09,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647419452] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:31:09,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863009035] [2022-04-06 14:31:09,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:31:09,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:31:09,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:31:09,484 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:31:09,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 14:33:06,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-04-06 14:33:06,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 14:33:06,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:06,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:09,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863009035] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:09,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:09,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-04-06 14:33:09,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [307915231] [2022-04-06 14:33:09,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [307915231] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:09,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:09,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 14:33:09,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956075958] [2022-04-06 14:33:09,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:09,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 14:33:09,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:09,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 14:33:09,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 14:33:09,369 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) [2022-04-06 14:33:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:10,752 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-04-06 14:33:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 14:33:10,752 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 [2022-04-06 14:33:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:10,753 INFO L225 Difference]: With dead ends: 142 [2022-04-06 14:33:10,753 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 14:33:10,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 14:33:10,756 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 [2022-04-06 14:33:10,756 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] [2022-04-06 14:33:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 14:33:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-04-06 14:33:10,779 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) [2022-04-06 14:33:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2022-04-06 14:33:10,779 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2022-04-06 14:33:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:10,779 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2022-04-06 14:33:10,779 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) [2022-04-06 14:33:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2022-04-06 14:33:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 14:33:10,780 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:10,780 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:10,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-04-06 14:33:10,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:10,981 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 121 times [2022-04-06 14:33:10,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:10,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546793063] [2022-04-06 14:33:10,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:10,982 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:10,982 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:10,982 INFO L85 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 122 times [2022-04-06 14:33:10,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:10,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45175160] [2022-04-06 14:33:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:10,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:12,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:12,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:12,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45175160] [2022-04-06 14:33:12,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45175160] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:12,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504264139] [2022-04-06 14:33:12,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:33:12,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:12,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:12,158 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:33:12,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 14:33:12,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:33:12,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 14:33:12,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:12,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:15,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504264139] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:15,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:15,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-04-06 14:33:15,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:15,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546793063] [2022-04-06 14:33:15,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546793063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:15,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:15,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 14:33:15,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808407174] [2022-04-06 14:33:15,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:15,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 14:33:15,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:15,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 14:33:15,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 14:33:15,905 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) [2022-04-06 14:33:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:17,300 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-04-06 14:33:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 14:33:17,301 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 [2022-04-06 14:33:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:17,301 INFO L225 Difference]: With dead ends: 144 [2022-04-06 14:33:17,301 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 14:33:17,302 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 [2022-04-06 14:33:17,303 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 [2022-04-06 14:33:17,303 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] [2022-04-06 14:33:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 14:33:17,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-04-06 14:33:17,326 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) [2022-04-06 14:33:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2022-04-06 14:33:17,326 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2022-04-06 14:33:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:17,327 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2022-04-06 14:33:17,327 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) [2022-04-06 14:33:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2022-04-06 14:33:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-04-06 14:33:17,327 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:17,327 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:17,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 14:33:17,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:17,531 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 123 times [2022-04-06 14:33:17,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:17,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1875194185] [2022-04-06 14:33:17,533 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:17,533 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:17,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:17,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 124 times [2022-04-06 14:33:17,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:17,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977742459] [2022-04-06 14:33:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:17,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:18,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:18,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977742459] [2022-04-06 14:33:18,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977742459] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373330019] [2022-04-06 14:33:18,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:33:18,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:18,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:18,691 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:33:18,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 14:33:19,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:33:19,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:19,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 14:33:19,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:19,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:22,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373330019] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:22,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:22,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-04-06 14:33:22,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:22,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1875194185] [2022-04-06 14:33:22,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1875194185] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:22,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:22,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 14:33:22,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435144232] [2022-04-06 14:33:22,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:22,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 14:33:22,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:22,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 14:33:22,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 14:33:22,514 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) [2022-04-06 14:33:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:23,935 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-04-06 14:33:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 14:33:23,936 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 [2022-04-06 14:33:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:23,936 INFO L225 Difference]: With dead ends: 146 [2022-04-06 14:33:23,936 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 14:33:23,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=16386, Invalid=20670, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 14:33:23,939 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 [2022-04-06 14:33:23,939 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] [2022-04-06 14:33:23,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 14:33:23,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-04-06 14:33:23,963 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) [2022-04-06 14:33:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-04-06 14:33:23,963 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2022-04-06 14:33:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:23,964 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-04-06 14:33:23,964 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) [2022-04-06 14:33:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-04-06 14:33:23,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 14:33:23,964 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:23,964 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:23,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 14:33:24,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:24,165 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:24,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 125 times [2022-04-06 14:33:24,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:24,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1003280691] [2022-04-06 14:33:24,166 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:24,166 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:24,166 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:24,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 126 times [2022-04-06 14:33:24,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:24,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093942981] [2022-04-06 14:33:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:24,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:25,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:25,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:25,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093942981] [2022-04-06 14:33:25,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093942981] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:25,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395713747] [2022-04-06 14:33:25,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:33:25,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:25,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:25,402 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:33:25,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 14:36:15,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-04-06 14:36:15,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 14:36:15,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:16,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:19,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395713747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:19,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:19,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-04-06 14:36:19,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:19,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1003280691] [2022-04-06 14:36:19,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1003280691] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:19,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:19,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 14:36:19,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960534422] [2022-04-06 14:36:19,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:19,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 14:36:19,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:19,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 14:36:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 14:36:19,590 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) [2022-04-06 14:36:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:21,141 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-04-06 14:36:21,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 14:36:21,141 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 [2022-04-06 14:36:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:21,142 INFO L225 Difference]: With dead ends: 148 [2022-04-06 14:36:21,142 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 14:36:21,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 14:36:21,144 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 [2022-04-06 14:36:21,144 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] [2022-04-06 14:36:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 14:36:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-04-06 14:36:21,169 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) [2022-04-06 14:36:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2022-04-06 14:36:21,170 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2022-04-06 14:36:21,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:21,170 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2022-04-06 14:36:21,170 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) [2022-04-06 14:36:21,170 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2022-04-06 14:36:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-04-06 14:36:21,170 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:21,170 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:21,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:21,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 14:36:21,371 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:21,371 INFO L85 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 127 times [2022-04-06 14:36:21,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:21,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529071244] [2022-04-06 14:36:21,372 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:36:21,373 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:36:21,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:36:21,373 INFO L85 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 128 times [2022-04-06 14:36:21,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:21,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201881254] [2022-04-06 14:36:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:21,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:22,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:22,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:22,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201881254] [2022-04-06 14:36:22,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201881254] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:22,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652423236] [2022-04-06 14:36:22,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:22,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:22,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:22,614 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:22,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 14:36:23,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:23,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 14:36:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:23,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:26,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652423236] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:26,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:26,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-04-06 14:36:26,753 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:26,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [529071244] [2022-04-06 14:36:26,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [529071244] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:26,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:26,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 14:36:26,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815022315] [2022-04-06 14:36:26,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:26,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 14:36:26,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 14:36:26,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 14:36:26,755 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) [2022-04-06 14:36:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:28,359 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-04-06 14:36:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 14:36:28,359 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 [2022-04-06 14:36:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:28,360 INFO L225 Difference]: With dead ends: 150 [2022-04-06 14:36:28,360 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 14:36:28,361 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 [2022-04-06 14:36:28,362 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 [2022-04-06 14:36:28,362 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] [2022-04-06 14:36:28,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 14:36:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2022-04-06 14:36:28,388 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) [2022-04-06 14:36:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2022-04-06 14:36:28,389 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2022-04-06 14:36:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:28,389 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2022-04-06 14:36:28,389 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) [2022-04-06 14:36:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2022-04-06 14:36:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-04-06 14:36:28,390 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:28,390 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:28,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 14:36:28,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:28,590 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:28,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:28,591 INFO L85 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 129 times [2022-04-06 14:36:28,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:28,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1432136692] [2022-04-06 14:36:28,592 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:36:28,592 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:36:28,592 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:36:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 130 times [2022-04-06 14:36:28,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:28,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277272629] [2022-04-06 14:36:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:28,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:29,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:29,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:29,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277272629] [2022-04-06 14:36:29,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277272629] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:29,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7186026] [2022-04-06 14:36:29,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:29,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:29,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:29,884 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:29,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 14:36:30,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:30,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:30,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 14:36:30,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:30,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:34,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7186026] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:34,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:34,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-04-06 14:36:34,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:34,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1432136692] [2022-04-06 14:36:34,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1432136692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:34,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:34,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 14:36:34,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497110678] [2022-04-06 14:36:34,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:34,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 14:36:34,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 14:36:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 14:36:34,150 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) [2022-04-06 14:36:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:35,775 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-04-06 14:36:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 14:36:35,776 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 [2022-04-06 14:36:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:35,776 INFO L225 Difference]: With dead ends: 152 [2022-04-06 14:36:35,776 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 14:36:35,778 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 [2022-04-06 14:36:35,779 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 [2022-04-06 14:36:35,779 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] [2022-04-06 14:36:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 14:36:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-04-06 14:36:35,806 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) [2022-04-06 14:36:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2022-04-06 14:36:35,806 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2022-04-06 14:36:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:35,806 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2022-04-06 14:36:35,806 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) [2022-04-06 14:36:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2022-04-06 14:36:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-04-06 14:36:35,807 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:35,807 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:35,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 14:36:36,013 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 14:36:36,013 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 131 times [2022-04-06 14:36:36,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:36,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [903525394] [2022-04-06 14:36:36,014 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:36:36,014 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:36:36,014 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:36:36,014 INFO L85 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 132 times [2022-04-06 14:36:36,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:36,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22535604] [2022-04-06 14:36:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:36,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:37,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:37,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:37,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22535604] [2022-04-06 14:36:37,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22535604] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:37,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475846966] [2022-04-06 14:36:37,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:37,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:37,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:37,384 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:37,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process