/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_2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:48:01,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:48:01,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:48:01,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 12:48:01,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:48:01,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:48:01,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:48:01,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 12:48:01,907 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:48:01,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:48:01,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:48:01,908 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 12:48:01,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:48:01,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 12:48:01,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:48:01,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:48:01,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:48:01,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:48:01,908 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 12:48:01,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:48:01,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:48:01,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:48:01,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:48:01,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:48:01,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 12:48:01,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:48:01,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:48:01,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:48:01,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 12:48:01,910 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 12:48:01,910 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 12:48:01,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:48:01,910 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 12:48:01,910 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:48:02,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:48:02,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:48:02,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:48:02,119 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:48:02,121 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:48:02,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i [2022-03-20 12:48:02,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38962252f/746ec6e330a846ea8eaab79349b23343/FLAGf3266ddb2 [2022-03-20 12:48:02,483 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:48:02,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i [2022-03-20 12:48:02,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38962252f/746ec6e330a846ea8eaab79349b23343/FLAGf3266ddb2 [2022-03-20 12:48:02,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38962252f/746ec6e330a846ea8eaab79349b23343 [2022-03-20 12:48:02,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:48:02,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 12:48:02,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:48:02,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:48:02,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:48:02,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:48:02" (1/1) ... [2022-03-20 12:48:02,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21125ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:48:02, skipping insertion in model container [2022-03-20 12:48:02,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:48:02" (1/1) ... [2022-03-20 12:48:02,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:48:02,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:48:03,086 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_2-1.i[849,862] [2022-03-20 12:48:03,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:48:03,108 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:48:03,118 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_2-1.i[849,862] [2022-03-20 12:48:03,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:48:03,136 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:48:03,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:48:03 WrapperNode [2022-03-20 12:48:03,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:48:03,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:48:03,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:48:03,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:48:03,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:48:03" (1/1) ... [2022-03-20 12:48:03,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:48:03" (1/1) ... [2022-03-20 12:48:03,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:48:03" (1/1) ... [2022-03-20 12:48:03,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:48:03" (1/1) ... [2022-03-20 12:48:03,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:48:03" (1/1) ... [2022-03-20 12:48:03,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:48:03" (1/1) ... [2022-03-20 12:48:03,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:48:03" (1/1) ... [2022-03-20 12:48:03,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:48:03,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:48:03,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:48:03,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:48:03,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:48:03" (1/1) ... [2022-03-20 12:48:03,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:48:03,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:03,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 12:48:03,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 12:48:03,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:48:03,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:48:03,246 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:48:03,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 12:48:03,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:48:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:48:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:48:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 12:48:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 12:48:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:48:03,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:48:03,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 12:48:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 12:48:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:48:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 12:48:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:48:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:48:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:48:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:48:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:48:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:48:03,323 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:48:03,324 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:48:03,459 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:48:03,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:48:03,462 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 12:48:03,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:48:03 BoogieIcfgContainer [2022-03-20 12:48:03,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:48:03,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:48:03,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:48:03,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:48:03,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:48:02" (1/3) ... [2022-03-20 12:48:03,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a515703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:48:03, skipping insertion in model container [2022-03-20 12:48:03,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:48:03" (2/3) ... [2022-03-20 12:48:03,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a515703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:48:03, skipping insertion in model container [2022-03-20 12:48:03,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:48:03" (3/3) ... [2022-03-20 12:48:03,470 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2022-03-20 12:48:03,473 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:48:03,473 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:48:03,498 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:48:03,502 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 12:48:03,502 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:48:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 12:48:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 12:48:03,515 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:03,516 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:03,516 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:03,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1954431608, now seen corresponding path program 1 times [2022-03-20 12:48:03,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:03,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [567898786] [2022-03-20 12:48:03,538 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:48:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1954431608, now seen corresponding path program 2 times [2022-03-20 12:48:03,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:03,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135004971] [2022-03-20 12:48:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:03,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:03,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:48:03,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:03,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135004971] [2022-03-20 12:48:03,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135004971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:03,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:03,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:48:03,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:03,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [567898786] [2022-03-20 12:48:03,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [567898786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:03,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:03,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:48:03,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232990852] [2022-03-20 12:48:03,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:03,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 12:48:03,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 12:48:03,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:48:03,718 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:03,761 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-03-20 12:48:03,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 12:48:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 12:48:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:03,766 INFO L225 Difference]: With dead ends: 40 [2022-03-20 12:48:03,766 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 12:48:03,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:48:03,775 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:03,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:48:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 12:48:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 12:48:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-20 12:48:03,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-03-20 12:48:03,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:03,806 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-20 12:48:03,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:03,806 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-20 12:48:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 12:48:03,807 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:03,807 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:03,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:48:03,808 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:03,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash 301833364, now seen corresponding path program 1 times [2022-03-20 12:48:03,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:03,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2038006725] [2022-03-20 12:48:03,810 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:48:03,811 INFO L85 PathProgramCache]: Analyzing trace with hash 301833364, now seen corresponding path program 2 times [2022-03-20 12:48:03,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:03,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662992328] [2022-03-20 12:48:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:03,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:03,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:48:03,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:03,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662992328] [2022-03-20 12:48:03,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662992328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:03,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:03,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:48:03,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:03,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2038006725] [2022-03-20 12:48:03,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2038006725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:03,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:03,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:48:03,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057068037] [2022-03-20 12:48:03,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:03,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:48:03,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:48:03,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:48:03,892 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:03,931 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-03-20 12:48:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:48:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 12:48:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:03,936 INFO L225 Difference]: With dead ends: 30 [2022-03-20 12:48:03,936 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 12:48:03,940 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:48:03,942 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:03,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:48:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 12:48:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-03-20 12:48:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-03-20 12:48:03,952 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-03-20 12:48:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:03,953 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-03-20 12:48:03,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-03-20 12:48:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 12:48:03,955 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:03,955 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:03,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:48:03,955 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:03,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1319589272, now seen corresponding path program 1 times [2022-03-20 12:48:03,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:03,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1821021820] [2022-03-20 12:48:03,967 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:03,967 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:03,967 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1319589272, now seen corresponding path program 2 times [2022-03-20 12:48:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:03,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692765648] [2022-03-20 12:48:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:03,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:04,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:48:04,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:04,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692765648] [2022-03-20 12:48:04,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692765648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:04,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597358349] [2022-03-20 12:48:04,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:48:04,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:04,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:04,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:04,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 12:48:04,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:48:04,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:04,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 12:48:04,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:48:04,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:48:04,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597358349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:04,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:04,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 12:48:04,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:04,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1821021820] [2022-03-20 12:48:04,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1821021820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:04,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:04,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:48:04,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694638335] [2022-03-20 12:48:04,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:04,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:48:04,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:04,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:48:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 12:48:04,264 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:04,318 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-03-20 12:48:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:48:04,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 12:48:04,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:04,319 INFO L225 Difference]: With dead ends: 35 [2022-03-20 12:48:04,319 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 12:48:04,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 12:48:04,323 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:04,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:48:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 12:48:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-03-20 12:48:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-03-20 12:48:04,338 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2022-03-20 12:48:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:04,338 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-03-20 12:48:04,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-03-20 12:48:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 12:48:04,340 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:04,340 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:04,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:04,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:04,552 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:04,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1327365276, now seen corresponding path program 3 times [2022-03-20 12:48:04,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:04,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1103863630] [2022-03-20 12:48:04,554 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:04,555 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:04,555 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:04,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1327365276, now seen corresponding path program 4 times [2022-03-20 12:48:04,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:04,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438256521] [2022-03-20 12:48:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:04,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:04,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:48:04,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:04,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438256521] [2022-03-20 12:48:04,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438256521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:04,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232819788] [2022-03-20 12:48:04,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:48:04,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:04,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:04,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:04,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 12:48:04,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:48:04,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:04,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:48:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:48:04,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:48:04,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232819788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:04,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:04,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 12:48:04,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:04,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1103863630] [2022-03-20 12:48:04,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1103863630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:04,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:04,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:48:04,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429162591] [2022-03-20 12:48:04,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:04,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:48:04,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:04,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:48:04,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 12:48:04,791 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:04,860 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-03-20 12:48:04,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:48:04,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 22 [2022-03-20 12:48:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:04,861 INFO L225 Difference]: With dead ends: 41 [2022-03-20 12:48:04,861 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 12:48:04,862 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-03-20 12:48:04,863 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:04,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 21 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:48:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 12:48:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-03-20 12:48:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-20 12:48:04,874 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2022-03-20 12:48:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:04,874 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-20 12:48:04,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:04,875 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-20 12:48:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:48:04,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:04,875 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:04,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:05,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 12:48:05,086 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2060021344, now seen corresponding path program 5 times [2022-03-20 12:48:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:05,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1968455393] [2022-03-20 12:48:05,089 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:05,089 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:05,089 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:05,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2060021344, now seen corresponding path program 6 times [2022-03-20 12:48:05,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:05,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017576932] [2022-03-20 12:48:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:05,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:05,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 12:48:05,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:05,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017576932] [2022-03-20 12:48:05,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017576932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:05,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467315308] [2022-03-20 12:48:05,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:48:05,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:05,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:05,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:05,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 12:48:05,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 12:48:05,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:05,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 12:48:05,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 12:48:05,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 12:48:05,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467315308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:05,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:05,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-20 12:48:05,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:05,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1968455393] [2022-03-20 12:48:05,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1968455393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:05,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:05,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:48:05,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301623644] [2022-03-20 12:48:05,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:05,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:48:05,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:05,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:48:05,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-20 12:48:05,394 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:05,484 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-03-20 12:48:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:48:05,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 26 [2022-03-20 12:48:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:05,485 INFO L225 Difference]: With dead ends: 47 [2022-03-20 12:48:05,485 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 12:48:05,486 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-03-20 12:48:05,486 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:05,486 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 26 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 12:48:05,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-03-20 12:48:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-03-20 12:48:05,491 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2022-03-20 12:48:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:05,491 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-03-20 12:48:05,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-03-20 12:48:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 12:48:05,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:05,492 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:05,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:05,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:05,709 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash -515500892, now seen corresponding path program 7 times [2022-03-20 12:48:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:05,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [292629189] [2022-03-20 12:48:05,711 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:05,711 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:05,711 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:05,711 INFO L85 PathProgramCache]: Analyzing trace with hash -515500892, now seen corresponding path program 8 times [2022-03-20 12:48:05,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:05,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063686992] [2022-03-20 12:48:05,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:05,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:05,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 12:48:05,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:05,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063686992] [2022-03-20 12:48:05,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063686992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:05,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562231159] [2022-03-20 12:48:05,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:48:05,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:05,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:05,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:05,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 12:48:05,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:48:05,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:48:05,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 12:48:05,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 12:48:06,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562231159] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:06,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:06,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 12:48:06,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:06,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [292629189] [2022-03-20 12:48:06,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [292629189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:06,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:06,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:48:06,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251442530] [2022-03-20 12:48:06,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:06,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:48:06,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:48:06,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 12:48:06,011 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:06,093 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-03-20 12:48:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:48:06,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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 30 [2022-03-20 12:48:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:06,094 INFO L225 Difference]: With dead ends: 53 [2022-03-20 12:48:06,095 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 12:48:06,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-20 12:48:06,096 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:06,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:48:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 12:48:06,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-03-20 12:48:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-03-20 12:48:06,105 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2022-03-20 12:48:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:06,105 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-03-20 12:48:06,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-03-20 12:48:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 12:48:06,106 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:06,106 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:06,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:06,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:06,315 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1377928616, now seen corresponding path program 9 times [2022-03-20 12:48:06,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:06,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1106770502] [2022-03-20 12:48:06,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:06,318 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:06,318 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:06,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1377928616, now seen corresponding path program 10 times [2022-03-20 12:48:06,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:06,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835076952] [2022-03-20 12:48:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:06,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:06,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 12:48:06,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:06,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835076952] [2022-03-20 12:48:06,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835076952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:06,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773965299] [2022-03-20 12:48:06,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:48:06,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:06,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:06,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:06,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 12:48:06,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:48:06,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:06,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:48:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 12:48:06,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 12:48:06,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773965299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:06,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:06,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-20 12:48:06,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:06,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1106770502] [2022-03-20 12:48:06,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1106770502] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:06,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:06,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 12:48:06,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495250342] [2022-03-20 12:48:06,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:06,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 12:48:06,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:06,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 12:48:06,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-03-20 12:48:06,605 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:06,706 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-03-20 12:48:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 12:48:06,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 34 [2022-03-20 12:48:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:06,707 INFO L225 Difference]: With dead ends: 59 [2022-03-20 12:48:06,707 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 12:48:06,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-03-20 12:48:06,708 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:06,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 12:48:06,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-03-20 12:48:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-20 12:48:06,712 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-03-20 12:48:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:06,712 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-20 12:48:06,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-20 12:48:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 12:48:06,713 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:06,713 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:06,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:06,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:06,927 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:06,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:06,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1159586988, now seen corresponding path program 11 times [2022-03-20 12:48:06,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:06,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [206430372] [2022-03-20 12:48:06,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:06,929 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:06,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1159586988, now seen corresponding path program 12 times [2022-03-20 12:48:06,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:06,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003931842] [2022-03-20 12:48:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:06,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:07,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:48:07,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:07,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003931842] [2022-03-20 12:48:07,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003931842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:07,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130665961] [2022-03-20 12:48:07,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:48:07,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:07,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:07,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:07,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 12:48:07,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 12:48:07,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:07,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 12:48:07,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:48:07,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 12:48:07,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130665961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:07,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:07,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 12:48:07,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:07,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [206430372] [2022-03-20 12:48:07,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [206430372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:07,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:07,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 12:48:07,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351420358] [2022-03-20 12:48:07,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:07,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 12:48:07,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:07,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 12:48:07,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:48:07,373 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:07,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:07,474 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-03-20 12:48:07,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 12:48:07,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 38 [2022-03-20 12:48:07,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:07,475 INFO L225 Difference]: With dead ends: 65 [2022-03-20 12:48:07,475 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 12:48:07,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-03-20 12:48:07,476 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:07,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:48:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 12:48:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-03-20 12:48:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-03-20 12:48:07,481 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2022-03-20 12:48:07,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:07,481 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-03-20 12:48:07,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-03-20 12:48:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 12:48:07,482 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:07,482 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:07,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:07,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:07,696 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash 638595504, now seen corresponding path program 13 times [2022-03-20 12:48:07,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:07,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [341050317] [2022-03-20 12:48:07,698 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:07,698 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:07,698 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:07,698 INFO L85 PathProgramCache]: Analyzing trace with hash 638595504, now seen corresponding path program 14 times [2022-03-20 12:48:07,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:07,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518862423] [2022-03-20 12:48:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:07,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:07,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-20 12:48:07,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:07,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518862423] [2022-03-20 12:48:07,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518862423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:07,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262513049] [2022-03-20 12:48:07,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:48:07,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:07,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:07,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:07,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 12:48:07,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:48:07,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 12:48:07,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-20 12:48:07,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-20 12:48:08,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262513049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:08,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:08,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-20 12:48:08,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [341050317] [2022-03-20 12:48:08,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [341050317] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:08,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:08,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 12:48:08,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993439037] [2022-03-20 12:48:08,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:08,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 12:48:08,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:08,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 12:48:08,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-20 12:48:08,095 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:08,215 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-03-20 12:48:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 12:48:08,215 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 42 [2022-03-20 12:48:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:08,216 INFO L225 Difference]: With dead ends: 71 [2022-03-20 12:48:08,216 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 12:48:08,216 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-20 12:48:08,217 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:08,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 41 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:08,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 12:48:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-03-20 12:48:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-03-20 12:48:08,221 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2022-03-20 12:48:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:08,222 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-03-20 12:48:08,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-03-20 12:48:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 12:48:08,222 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:08,222 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:08,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:08,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:08,439 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:08,440 INFO L85 PathProgramCache]: Analyzing trace with hash -548574028, now seen corresponding path program 15 times [2022-03-20 12:48:08,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:08,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1805601767] [2022-03-20 12:48:08,441 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:08,441 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:08,441 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash -548574028, now seen corresponding path program 16 times [2022-03-20 12:48:08,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:08,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201659718] [2022-03-20 12:48:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:08,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:08,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 12:48:08,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:08,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201659718] [2022-03-20 12:48:08,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201659718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:08,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869294046] [2022-03-20 12:48:08,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:48:08,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:08,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:08,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:08,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 12:48:08,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:48:08,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 12:48:08,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 12:48:08,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 12:48:08,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869294046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:08,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:08,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-20 12:48:08,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:08,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1805601767] [2022-03-20 12:48:08,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1805601767] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:08,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:08,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 12:48:08,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692118121] [2022-03-20 12:48:08,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:08,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 12:48:08,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:08,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 12:48:08,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-20 12:48:08,852 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:08,985 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-03-20 12:48:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 12:48:08,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 46 [2022-03-20 12:48:08,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:08,986 INFO L225 Difference]: With dead ends: 77 [2022-03-20 12:48:08,986 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 12:48:08,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-03-20 12:48:08,987 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:08,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 26 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 12:48:08,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-03-20 12:48:08,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-03-20 12:48:08,992 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-03-20 12:48:08,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:08,992 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-03-20 12:48:08,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:08,992 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-03-20 12:48:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 12:48:08,993 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:08,993 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:09,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:09,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 12:48:09,216 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1504351672, now seen corresponding path program 17 times [2022-03-20 12:48:09,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:09,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [81270376] [2022-03-20 12:48:09,218 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:09,219 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:09,219 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:09,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1504351672, now seen corresponding path program 18 times [2022-03-20 12:48:09,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:09,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132777817] [2022-03-20 12:48:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:09,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:09,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-20 12:48:09,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:09,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132777817] [2022-03-20 12:48:09,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132777817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:09,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655706621] [2022-03-20 12:48:09,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:48:09,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:09,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:09,330 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:09,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 12:48:10,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 12:48:10,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:10,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 12:48:10,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-20 12:48:10,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-20 12:48:10,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655706621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:10,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:10,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-20 12:48:10,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:10,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [81270376] [2022-03-20 12:48:10,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [81270376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:10,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:10,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 12:48:10,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322483998] [2022-03-20 12:48:10,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:10,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 12:48:10,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:10,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 12:48:10,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-20 12:48:10,447 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:10,589 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-03-20 12:48:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 12:48:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 50 [2022-03-20 12:48:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:10,590 INFO L225 Difference]: With dead ends: 83 [2022-03-20 12:48:10,590 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 12:48:10,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 12:48:10,591 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:10,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 51 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 12:48:10,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-03-20 12:48:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:10,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-03-20 12:48:10,610 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2022-03-20 12:48:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:10,611 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-03-20 12:48:10,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-03-20 12:48:10,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 12:48:10,614 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:10,614 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:10,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:10,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:10,829 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash -58938180, now seen corresponding path program 19 times [2022-03-20 12:48:10,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:10,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1471180427] [2022-03-20 12:48:10,831 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:10,831 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:10,831 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash -58938180, now seen corresponding path program 20 times [2022-03-20 12:48:10,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:10,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257549093] [2022-03-20 12:48:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:10,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 12:48:10,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:10,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257549093] [2022-03-20 12:48:10,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257549093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:10,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609485960] [2022-03-20 12:48:10,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:48:10,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:10,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:10,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:10,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 12:48:11,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:48:11,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:11,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 12:48:11,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 12:48:11,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 12:48:11,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609485960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:11,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:11,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 12:48:11,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:11,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1471180427] [2022-03-20 12:48:11,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1471180427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:11,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:11,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 12:48:11,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045317137] [2022-03-20 12:48:11,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:11,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 12:48:11,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:11,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 12:48:11,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 12:48:11,344 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:11,503 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-03-20 12:48:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 12:48:11,504 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 54 [2022-03-20 12:48:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:11,504 INFO L225 Difference]: With dead ends: 89 [2022-03-20 12:48:11,504 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 12:48:11,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 12:48:11,506 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:11,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 26 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 12:48:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2022-03-20 12:48:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:11,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-03-20 12:48:11,514 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-03-20 12:48:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:11,515 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-03-20 12:48:11,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-03-20 12:48:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 12:48:11,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:11,516 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:11,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:11,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 12:48:11,731 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:11,732 INFO L85 PathProgramCache]: Analyzing trace with hash 764981696, now seen corresponding path program 21 times [2022-03-20 12:48:11,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:11,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1068714268] [2022-03-20 12:48:11,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:11,733 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:11,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash 764981696, now seen corresponding path program 22 times [2022-03-20 12:48:11,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:11,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397356845] [2022-03-20 12:48:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:11,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 12:48:11,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:11,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397356845] [2022-03-20 12:48:11,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397356845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:11,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231064135] [2022-03-20 12:48:11,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:48:11,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:11,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:11,835 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:11,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 12:48:11,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:48:11,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:11,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 12:48:11,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 12:48:12,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 12:48:12,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231064135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:12,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:12,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-20 12:48:12,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:12,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1068714268] [2022-03-20 12:48:12,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1068714268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:12,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:12,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 12:48:12,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084976911] [2022-03-20 12:48:12,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:12,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 12:48:12,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:12,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 12:48:12,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-03-20 12:48:12,256 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:12,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:12,429 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-03-20 12:48:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 12:48:12,429 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 58 [2022-03-20 12:48:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:12,430 INFO L225 Difference]: With dead ends: 95 [2022-03-20 12:48:12,430 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 12:48:12,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 12:48:12,431 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:12,431 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 31 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 12:48:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-03-20 12:48:12,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-03-20 12:48:12,436 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2022-03-20 12:48:12,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:12,436 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-03-20 12:48:12,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:12,436 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-03-20 12:48:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 12:48:12,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:12,436 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:12,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 12:48:12,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 12:48:12,651 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:12,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:12,652 INFO L85 PathProgramCache]: Analyzing trace with hash -783047484, now seen corresponding path program 23 times [2022-03-20 12:48:12,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:12,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1059193318] [2022-03-20 12:48:12,653 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:12,653 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:12,653 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:12,653 INFO L85 PathProgramCache]: Analyzing trace with hash -783047484, now seen corresponding path program 24 times [2022-03-20 12:48:12,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:12,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274907448] [2022-03-20 12:48:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:12,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:12,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 12:48:12,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:12,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274907448] [2022-03-20 12:48:12,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274907448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:12,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638897619] [2022-03-20 12:48:12,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:48:12,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:12,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:12,853 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:12,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 12:48:15,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 12:48:15,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 12:48:15,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 12:48:15,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 12:48:16,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638897619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:16,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:16,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 31 [2022-03-20 12:48:16,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:16,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1059193318] [2022-03-20 12:48:16,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1059193318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:16,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:16,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 12:48:16,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841693271] [2022-03-20 12:48:16,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:16,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 12:48:16,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 12:48:16,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-03-20 12:48:16,139 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:16,341 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-03-20 12:48:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 12:48:16,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 62 [2022-03-20 12:48:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:16,341 INFO L225 Difference]: With dead ends: 101 [2022-03-20 12:48:16,341 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 12:48:16,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 12:48:16,343 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:16,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 21 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 12:48:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-03-20 12:48:16,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-03-20 12:48:16,349 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2022-03-20 12:48:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:16,349 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-03-20 12:48:16,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-03-20 12:48:16,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 12:48:16,349 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:16,350 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:16,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:16,550 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 12:48:16,550 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:16,551 INFO L85 PathProgramCache]: Analyzing trace with hash -897415736, now seen corresponding path program 25 times [2022-03-20 12:48:16,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:16,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [607646032] [2022-03-20 12:48:16,552 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:16,552 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:16,552 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:16,552 INFO L85 PathProgramCache]: Analyzing trace with hash -897415736, now seen corresponding path program 26 times [2022-03-20 12:48:16,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:16,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074214601] [2022-03-20 12:48:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:16,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:16,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 12:48:16,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074214601] [2022-03-20 12:48:16,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074214601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:16,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843108424] [2022-03-20 12:48:16,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:48:16,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:16,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:16,716 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:16,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 12:48:16,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:48:16,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:16,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 12:48:16,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 12:48:16,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 12:48:17,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843108424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:17,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:17,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-20 12:48:17,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:17,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [607646032] [2022-03-20 12:48:17,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [607646032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:17,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:17,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 12:48:17,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804606950] [2022-03-20 12:48:17,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:17,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 12:48:17,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 12:48:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-20 12:48:17,198 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:17,416 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2022-03-20 12:48:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 12:48:17,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 66 [2022-03-20 12:48:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:17,417 INFO L225 Difference]: With dead ends: 107 [2022-03-20 12:48:17,417 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 12:48:17,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 12:48:17,418 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 98 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:17,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 26 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 12:48:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-03-20 12:48:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-03-20 12:48:17,428 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2022-03-20 12:48:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:17,428 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-03-20 12:48:17,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-03-20 12:48:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 12:48:17,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:17,428 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:17,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:17,646 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 12:48:17,646 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:17,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2054837452, now seen corresponding path program 27 times [2022-03-20 12:48:17,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:17,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [760865556] [2022-03-20 12:48:17,647 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:17,648 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:17,648 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2054837452, now seen corresponding path program 28 times [2022-03-20 12:48:17,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:17,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146282848] [2022-03-20 12:48:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:17,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:17,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 12:48:17,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:17,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146282848] [2022-03-20 12:48:17,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146282848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:17,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167676204] [2022-03-20 12:48:17,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:48:17,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:17,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:17,803 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:17,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 12:48:17,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:48:17,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:17,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 12:48:17,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 12:48:18,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 12:48:18,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167676204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:18,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:18,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-20 12:48:18,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:18,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [760865556] [2022-03-20 12:48:18,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [760865556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:18,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:18,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 12:48:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554518798] [2022-03-20 12:48:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:18,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 12:48:18,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:18,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 12:48:18,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 12:48:18,346 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:18,559 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-03-20 12:48:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 12:48:18,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 70 [2022-03-20 12:48:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:18,560 INFO L225 Difference]: With dead ends: 113 [2022-03-20 12:48:18,560 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 12:48:18,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 12:48:18,561 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:18,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 36 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 12:48:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-20 12:48:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-03-20 12:48:18,567 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2022-03-20 12:48:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:18,567 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-03-20 12:48:18,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-03-20 12:48:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 12:48:18,568 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:18,568 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:18,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 12:48:18,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:18,771 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:18,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:18,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1091572176, now seen corresponding path program 29 times [2022-03-20 12:48:18,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:18,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1555640560] [2022-03-20 12:48:18,773 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:18,773 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:18,773 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1091572176, now seen corresponding path program 30 times [2022-03-20 12:48:18,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:18,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097493432] [2022-03-20 12:48:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:18,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:18,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-03-20 12:48:18,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:18,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097493432] [2022-03-20 12:48:18,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097493432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:18,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631392987] [2022-03-20 12:48:18,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:48:18,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:18,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:18,930 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:18,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 12:48:36,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 12:48:36,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:36,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 12:48:36,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-03-20 12:48:36,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-03-20 12:48:36,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631392987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:36,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:36,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-20 12:48:36,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:36,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1555640560] [2022-03-20 12:48:36,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1555640560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:36,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:36,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 12:48:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704960106] [2022-03-20 12:48:36,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:36,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 12:48:36,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 12:48:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 12:48:36,500 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:36,756 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-03-20 12:48:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 12:48:36,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 74 [2022-03-20 12:48:36,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:36,756 INFO L225 Difference]: With dead ends: 119 [2022-03-20 12:48:36,757 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 12:48:36,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 12:48:36,758 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:36,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 36 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:36,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 12:48:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-20 12:48:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-20 12:48:36,764 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-03-20 12:48:36,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:36,764 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-20 12:48:36,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:36,764 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-20 12:48:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 12:48:36,765 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:36,765 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:36,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:36,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 12:48:36,971 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:36,972 INFO L85 PathProgramCache]: Analyzing trace with hash -57099052, now seen corresponding path program 31 times [2022-03-20 12:48:36,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:36,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [664549725] [2022-03-20 12:48:36,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:36,973 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:36,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash -57099052, now seen corresponding path program 32 times [2022-03-20 12:48:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:36,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741703826] [2022-03-20 12:48:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:37,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-20 12:48:37,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741703826] [2022-03-20 12:48:37,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741703826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804725306] [2022-03-20 12:48:37,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:48:37,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:37,160 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:37,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 12:48:37,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:48:37,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:37,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 12:48:37,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-20 12:48:37,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-20 12:48:37,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804725306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:37,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:37,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-20 12:48:37,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:37,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [664549725] [2022-03-20 12:48:37,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [664549725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:37,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:37,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 12:48:37,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818616563] [2022-03-20 12:48:37,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:37,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 12:48:37,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:37,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 12:48:37,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 12:48:37,869 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:38,126 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-03-20 12:48:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 12:48:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 78 [2022-03-20 12:48:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:38,127 INFO L225 Difference]: With dead ends: 125 [2022-03-20 12:48:38,127 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 12:48:38,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 12:48:38,128 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:38,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 31 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 12:48:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-03-20 12:48:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-03-20 12:48:38,134 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2022-03-20 12:48:38,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:38,134 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-03-20 12:48:38,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-03-20 12:48:38,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 12:48:38,135 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:38,135 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:38,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:38,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 12:48:38,351 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1981196840, now seen corresponding path program 33 times [2022-03-20 12:48:38,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:38,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393287861] [2022-03-20 12:48:38,353 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:38,353 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:38,353 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1981196840, now seen corresponding path program 34 times [2022-03-20 12:48:38,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:38,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744006294] [2022-03-20 12:48:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:38,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:38,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 12:48:38,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:38,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744006294] [2022-03-20 12:48:38,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744006294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:38,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485147954] [2022-03-20 12:48:38,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:48:38,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:38,579 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:38,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 12:48:38,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:48:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 12:48:38,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 12:48:38,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 12:48:39,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485147954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:39,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:39,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-20 12:48:39,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393287861] [2022-03-20 12:48:39,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393287861] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:39,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:39,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 12:48:39,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115775389] [2022-03-20 12:48:39,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:39,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 12:48:39,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:39,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 12:48:39,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 12:48:39,340 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:39,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:39,622 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2022-03-20 12:48:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 12:48:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 82 [2022-03-20 12:48:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:39,623 INFO L225 Difference]: With dead ends: 131 [2022-03-20 12:48:39,623 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 12:48:39,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 12:48:39,624 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:39,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 26 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:48:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 12:48:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-03-20 12:48:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-03-20 12:48:39,631 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2022-03-20 12:48:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:39,631 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-03-20 12:48:39,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:48:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-03-20 12:48:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 12:48:39,631 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:39,631 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:39,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:39,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:39,848 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:39,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:39,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1146543324, now seen corresponding path program 35 times [2022-03-20 12:48:39,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:39,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [718162809] [2022-03-20 12:48:39,849 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:39,849 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:39,850 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:39,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1146543324, now seen corresponding path program 36 times [2022-03-20 12:48:39,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:39,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87823543] [2022-03-20 12:48:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:39,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:40,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-20 12:48:40,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:40,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87823543] [2022-03-20 12:48:40,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87823543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:40,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206589728] [2022-03-20 12:48:40,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:48:40,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:40,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:40,049 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:40,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 12:49:10,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 12:49:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:10,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 12:49:10,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-20 12:49:10,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-20 12:49:11,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206589728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:11,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:11,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-20 12:49:11,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:11,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [718162809] [2022-03-20 12:49:11,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [718162809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:11,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:11,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 12:49:11,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893478178] [2022-03-20 12:49:11,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:11,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 12:49:11,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:11,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 12:49:11,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 12:49:11,200 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:11,477 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-03-20 12:49:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 12:49:11,478 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 86 [2022-03-20 12:49:11,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:11,478 INFO L225 Difference]: With dead ends: 137 [2022-03-20 12:49:11,478 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 12:49:11,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 12:49:11,485 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:11,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 36 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:49:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 12:49:11,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2022-03-20 12:49:11,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:11,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-03-20 12:49:11,492 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2022-03-20 12:49:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:11,492 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-03-20 12:49:11,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-03-20 12:49:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 12:49:11,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:11,493 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:11,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:11,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:11,696 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2051649056, now seen corresponding path program 37 times [2022-03-20 12:49:11,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:11,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [675210381] [2022-03-20 12:49:11,698 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:11,698 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:11,698 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:11,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2051649056, now seen corresponding path program 38 times [2022-03-20 12:49:11,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:11,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204232832] [2022-03-20 12:49:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:11,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:11,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-03-20 12:49:11,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:11,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204232832] [2022-03-20 12:49:11,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204232832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:11,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378312077] [2022-03-20 12:49:11,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:49:11,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:11,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:11,911 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:11,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 12:49:12,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:49:12,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:12,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 12:49:12,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-03-20 12:49:12,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-03-20 12:49:12,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378312077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:12,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:12,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-20 12:49:12,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:12,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [675210381] [2022-03-20 12:49:12,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [675210381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:12,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:12,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 12:49:12,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908795646] [2022-03-20 12:49:12,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:12,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 12:49:12,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:12,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 12:49:12,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 12:49:12,724 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:13,008 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2022-03-20 12:49:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 12:49:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 90 [2022-03-20 12:49:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:13,009 INFO L225 Difference]: With dead ends: 143 [2022-03-20 12:49:13,009 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 12:49:13,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 12:49:13,010 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 127 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:13,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 31 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:49:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 12:49:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-03-20 12:49:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-03-20 12:49:13,018 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2022-03-20 12:49:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:13,018 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-03-20 12:49:13,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-03-20 12:49:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 12:49:13,019 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:13,019 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:13,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:13,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:13,229 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:13,229 INFO L85 PathProgramCache]: Analyzing trace with hash 643609828, now seen corresponding path program 39 times [2022-03-20 12:49:13,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:13,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1824066628] [2022-03-20 12:49:13,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:13,231 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:13,231 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:13,231 INFO L85 PathProgramCache]: Analyzing trace with hash 643609828, now seen corresponding path program 40 times [2022-03-20 12:49:13,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:13,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851242533] [2022-03-20 12:49:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:13,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:13,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 12:49:13,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851242533] [2022-03-20 12:49:13,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851242533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636793003] [2022-03-20 12:49:13,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:49:13,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:13,471 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:13,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 12:49:13,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:49:13,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:13,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 12:49:13,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 12:49:13,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 12:49:14,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636793003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:14,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:14,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-20 12:49:14,293 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:14,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1824066628] [2022-03-20 12:49:14,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1824066628] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:14,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:14,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 12:49:14,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216870543] [2022-03-20 12:49:14,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:14,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 12:49:14,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 12:49:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 12:49:14,295 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:14,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:14,616 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-03-20 12:49:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 12:49:14,618 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 94 [2022-03-20 12:49:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:14,618 INFO L225 Difference]: With dead ends: 149 [2022-03-20 12:49:14,619 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 12:49:14,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 12:49:14,620 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:14,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 36 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:49:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 12:49:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-03-20 12:49:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-03-20 12:49:14,628 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-03-20 12:49:14,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:14,628 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-03-20 12:49:14,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:49:14,629 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-03-20 12:49:14,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 12:49:14,629 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:14,629 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:14,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:14,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 12:49:14,833 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:14,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:14,834 INFO L85 PathProgramCache]: Analyzing trace with hash -48298520, now seen corresponding path program 41 times [2022-03-20 12:49:14,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:14,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742435652] [2022-03-20 12:49:14,835 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:14,835 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:14,835 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash -48298520, now seen corresponding path program 42 times [2022-03-20 12:49:14,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:14,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886703368] [2022-03-20 12:49:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:15,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-03-20 12:49:15,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:15,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886703368] [2022-03-20 12:49:15,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886703368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:15,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023276938] [2022-03-20 12:49:15,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:49:15,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:15,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:15,084 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:15,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 12:51:00,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 12:51:00,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:00,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 12:51:00,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-03-20 12:51:00,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-03-20 12:51:01,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023276938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:01,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:01,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-20 12:51:01,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:01,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742435652] [2022-03-20 12:51:01,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742435652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:01,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:01,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 12:51:01,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691859118] [2022-03-20 12:51:01,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:01,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 12:51:01,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:01,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 12:51:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 12:51:01,109 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:01,430 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2022-03-20 12:51:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 12:51:01,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 98 [2022-03-20 12:51:01,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:01,431 INFO L225 Difference]: With dead ends: 155 [2022-03-20 12:51:01,431 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 12:51:01,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 12:51:01,433 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 134 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:01,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 31 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 12:51:01,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-03-20 12:51:01,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-03-20 12:51:01,452 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-03-20 12:51:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:01,453 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-03-20 12:51:01,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-03-20 12:51:01,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:51:01,453 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:01,453 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:01,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 12:51:01,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 12:51:01,679 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:01,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1599227116, now seen corresponding path program 43 times [2022-03-20 12:51:01,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:01,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1574011091] [2022-03-20 12:51:01,681 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:01,681 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:01,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:01,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1599227116, now seen corresponding path program 44 times [2022-03-20 12:51:01,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:01,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912760542] [2022-03-20 12:51:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:01,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:01,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 12:51:01,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:01,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912760542] [2022-03-20 12:51:01,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912760542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:01,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671722003] [2022-03-20 12:51:01,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:51:01,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:01,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:01,923 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:01,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 12:51:02,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:51:02,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:02,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 12:51:02,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 12:51:02,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 12:51:02,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671722003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:02,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:02,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-20 12:51:02,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:02,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1574011091] [2022-03-20 12:51:02,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1574011091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:02,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:02,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 12:51:02,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795457160] [2022-03-20 12:51:02,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:02,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 12:51:02,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:02,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 12:51:02,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 12:51:02,858 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:03,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:03,235 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-03-20 12:51:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 12:51:03,236 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 102 [2022-03-20 12:51:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:03,236 INFO L225 Difference]: With dead ends: 161 [2022-03-20 12:51:03,236 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 12:51:03,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 12:51:03,237 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:03,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 36 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 12:51:03,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-03-20 12:51:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:03,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-03-20 12:51:03,246 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2022-03-20 12:51:03,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:03,246 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-03-20 12:51:03,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:03,246 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-03-20 12:51:03,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 12:51:03,247 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:03,247 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:03,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 12:51:03,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:03,453 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:03,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1597279760, now seen corresponding path program 45 times [2022-03-20 12:51:03,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:03,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1024930558] [2022-03-20 12:51:03,455 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:03,455 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:03,455 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:03,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1597279760, now seen corresponding path program 46 times [2022-03-20 12:51:03,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:03,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497804387] [2022-03-20 12:51:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:03,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:03,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-20 12:51:03,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:03,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497804387] [2022-03-20 12:51:03,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497804387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:03,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267587866] [2022-03-20 12:51:03,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:51:03,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:03,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:03,721 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:03,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 12:51:03,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:51:03,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:03,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 12:51:03,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-20 12:51:04,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-20 12:51:04,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267587866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:04,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:04,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-20 12:51:04,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:04,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1024930558] [2022-03-20 12:51:04,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1024930558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:04,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:04,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 12:51:04,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413444075] [2022-03-20 12:51:04,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:04,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 12:51:04,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:04,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 12:51:04,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 12:51:04,726 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:05,102 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2022-03-20 12:51:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 12:51:05,103 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 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 106 [2022-03-20 12:51:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:05,104 INFO L225 Difference]: With dead ends: 167 [2022-03-20 12:51:05,104 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 12:51:05,105 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 12:51:05,105 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 163 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:05,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 46 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:51:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 12:51:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-03-20 12:51:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-03-20 12:51:05,117 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2022-03-20 12:51:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:05,117 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-03-20 12:51:05,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:51:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-03-20 12:51:05,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 12:51:05,118 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:05,118 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:05,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 12:51:05,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:05,319 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:05,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:05,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1814065932, now seen corresponding path program 47 times [2022-03-20 12:51:05,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:05,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [338379288] [2022-03-20 12:51:05,320 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:05,320 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:05,320 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1814065932, now seen corresponding path program 48 times [2022-03-20 12:51:05,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:05,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984067961] [2022-03-20 12:51:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:05,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:05,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-03-20 12:51:05,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:05,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984067961] [2022-03-20 12:51:05,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984067961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:05,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605452717] [2022-03-20 12:51:05,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:51:05,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:05,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:05,593 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:05,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 12:53:23,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 12:53:23,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:24,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 12:53:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-03-20 12:53:24,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-03-20 12:53:24,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605452717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:53:24,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:53:24,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-20 12:53:24,876 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:53:24,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [338379288] [2022-03-20 12:53:24,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [338379288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:53:24,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:53:24,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 12:53:24,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220746989] [2022-03-20 12:53:24,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:53:24,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 12:53:24,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 12:53:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 12:53:24,879 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:25,303 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-03-20 12:53:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 12:53:25,303 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 110 [2022-03-20 12:53:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:25,304 INFO L225 Difference]: With dead ends: 173 [2022-03-20 12:53:25,304 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 12:53:25,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 12:53:25,305 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 166 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:53:25,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 36 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:53:25,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 12:53:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2022-03-20 12:53:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-03-20 12:53:25,315 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2022-03-20 12:53:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:25,315 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-03-20 12:53:25,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-03-20 12:53:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 12:53:25,316 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:25,316 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:53:25,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 12:53:25,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 12:53:25,524 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:25,525 INFO L85 PathProgramCache]: Analyzing trace with hash 157521400, now seen corresponding path program 49 times [2022-03-20 12:53:25,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:25,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [658038086] [2022-03-20 12:53:25,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:25,526 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:25,526 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:25,526 INFO L85 PathProgramCache]: Analyzing trace with hash 157521400, now seen corresponding path program 50 times [2022-03-20 12:53:25,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:25,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992004567] [2022-03-20 12:53:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:25,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:25,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-03-20 12:53:25,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992004567] [2022-03-20 12:53:25,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992004567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926702033] [2022-03-20 12:53:25,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:53:25,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:25,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:25,827 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:53:25,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 12:53:26,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:53:26,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 12:53:26,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-03-20 12:53:26,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-03-20 12:53:26,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926702033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:53:26,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:53:26,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-20 12:53:26,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:53:26,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [658038086] [2022-03-20 12:53:26,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [658038086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:53:26,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:53:26,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 12:53:26,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055360899] [2022-03-20 12:53:26,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:53:26,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 12:53:26,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:26,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 12:53:26,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 12:53:26,962 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:27,423 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2022-03-20 12:53:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 12:53:27,423 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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 114 [2022-03-20 12:53:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:27,424 INFO L225 Difference]: With dead ends: 179 [2022-03-20 12:53:27,424 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 12:53:27,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 12:53:27,425 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 213 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:53:27,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 21 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:53:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 12:53:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-03-20 12:53:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-03-20 12:53:27,436 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2022-03-20 12:53:27,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:27,436 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-03-20 12:53:27,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-03-20 12:53:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 12:53:27,437 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:27,437 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:53:27,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 12:53:27,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 12:53:27,656 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:27,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1353485564, now seen corresponding path program 51 times [2022-03-20 12:53:27,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:27,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1314433251] [2022-03-20 12:53:27,658 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:27,658 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:27,658 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:27,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1353485564, now seen corresponding path program 52 times [2022-03-20 12:53:27,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:27,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924570832] [2022-03-20 12:53:27,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:27,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:27,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-20 12:53:27,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:27,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924570832] [2022-03-20 12:53:27,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924570832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:27,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786992006] [2022-03-20 12:53:27,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:53:27,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:27,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:27,991 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:53:27,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 12:53:28,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:53:28,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:28,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 12:53:28,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-20 12:53:28,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-20 12:53:29,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786992006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:53:29,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:53:29,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-03-20 12:53:29,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:53:29,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1314433251] [2022-03-20 12:53:29,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1314433251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:53:29,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:53:29,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 12:53:29,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14121301] [2022-03-20 12:53:29,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:53:29,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 12:53:29,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:29,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 12:53:29,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 12:53:29,229 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:29,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:29,686 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2022-03-20 12:53:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 12:53:29,686 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 118 [2022-03-20 12:53:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:29,687 INFO L225 Difference]: With dead ends: 185 [2022-03-20 12:53:29,687 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 12:53:29,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 12:53:29,688 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 184 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:53:29,688 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 36 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:53:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 12:53:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-03-20 12:53:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-03-20 12:53:29,700 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2022-03-20 12:53:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:29,700 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-03-20 12:53:29,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:53:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-03-20 12:53:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 12:53:29,700 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:29,700 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:53:29,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 12:53:29,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 12:53:29,915 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1215335936, now seen corresponding path program 53 times [2022-03-20 12:53:29,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:29,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [975181047] [2022-03-20 12:53:29,917 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:29,917 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:29,917 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:29,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1215335936, now seen corresponding path program 54 times [2022-03-20 12:53:29,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:29,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146970239] [2022-03-20 12:53:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:29,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:30,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-03-20 12:53:30,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:30,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146970239] [2022-03-20 12:53:30,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146970239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:30,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020820594] [2022-03-20 12:53:30,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:53:30,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:30,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:30,258 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:53:30,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 12:58:49,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-20 12:58:49,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:58:50,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 12:58:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:58:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-03-20 12:58:50,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:58:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-03-20 12:58:51,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020820594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:58:51,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:58:51,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-20 12:58:51,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:58:51,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [975181047] [2022-03-20 12:58:51,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [975181047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:58:51,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:58:51,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 12:58:51,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641137621] [2022-03-20 12:58:51,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:58:51,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 12:58:51,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:51,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 12:58:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 12:58:51,132 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:58:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:58:51,624 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2022-03-20 12:58:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 12:58:51,624 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 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 122 [2022-03-20 12:58:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:58:51,625 INFO L225 Difference]: With dead ends: 191 [2022-03-20 12:58:51,625 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 12:58:51,626 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 12:58:51,626 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 172 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:58:51,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 41 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:58:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 12:58:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2022-03-20 12:58:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:58:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-03-20 12:58:51,639 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2022-03-20 12:58:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:58:51,639 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-03-20 12:58:51,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:58:51,639 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-03-20 12:58:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-20 12:58:51,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:58:51,640 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:58:51,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 12:58:51,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 12:58:51,856 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:58:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:58:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash 174146820, now seen corresponding path program 55 times [2022-03-20 12:58:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:51,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1942399709] [2022-03-20 12:58:51,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:58:51,857 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:58:51,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:58:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash 174146820, now seen corresponding path program 56 times [2022-03-20 12:58:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:58:51,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157210592] [2022-03-20 12:58:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:58:51,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:58:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:52,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:58:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-03-20 12:58:52,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:58:52,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157210592] [2022-03-20 12:58:52,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157210592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:58:52,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096532853] [2022-03-20 12:58:52,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:58:52,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:58:52,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:58:52,190 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:58:52,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 12:58:52,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:58:52,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:58:52,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 12:58:52,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:58:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-03-20 12:58:52,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:58:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-03-20 12:58:53,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096532853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:58:53,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:58:53,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-20 12:58:53,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:58:53,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1942399709] [2022-03-20 12:58:53,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1942399709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:58:53,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:58:53,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 12:58:53,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719996491] [2022-03-20 12:58:53,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:58:53,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 12:58:53,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:53,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 12:58:53,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 12:58:53,571 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:58:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:58:54,104 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2022-03-20 12:58:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 12:58:54,105 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 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 126 [2022-03-20 12:58:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:58:54,105 INFO L225 Difference]: With dead ends: 197 [2022-03-20 12:58:54,105 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 12:58:54,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 12:58:54,107 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 178 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:58:54,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 36 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:58:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 12:58:54,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-03-20 12:58:54,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:58:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-03-20 12:58:54,123 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2022-03-20 12:58:54,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:58:54,123 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-03-20 12:58:54,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:58:54,124 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-03-20 12:58:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-20 12:58:54,124 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:58:54,124 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:58:54,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 12:58:54,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:58:54,339 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:58:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:58:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash 334956040, now seen corresponding path program 57 times [2022-03-20 12:58:54,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:54,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2083428187] [2022-03-20 12:58:54,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:58:54,341 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:58:54,341 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:58:54,341 INFO L85 PathProgramCache]: Analyzing trace with hash 334956040, now seen corresponding path program 58 times [2022-03-20 12:58:54,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:58:54,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842570585] [2022-03-20 12:58:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:58:54,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:58:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:54,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:58:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 12:58:54,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:58:54,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842570585] [2022-03-20 12:58:54,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842570585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:58:54,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81519542] [2022-03-20 12:58:54,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:58:54,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:58:54,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:58:54,741 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:58:54,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 12:58:55,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:58:55,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:58:55,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 12:58:55,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:58:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 12:58:55,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:58:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 12:58:56,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81519542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:58:56,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:58:56,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-20 12:58:56,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:58:56,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2083428187] [2022-03-20 12:58:56,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2083428187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:58:56,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:58:56,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 12:58:56,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778891093] [2022-03-20 12:58:56,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:58:56,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 12:58:56,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:56,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 12:58:56,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 12:58:56,210 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:58:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:58:56,770 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2022-03-20 12:58:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 12:58:56,770 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 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 130 [2022-03-20 12:58:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:58:56,771 INFO L225 Difference]: With dead ends: 203 [2022-03-20 12:58:56,771 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 12:58:56,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 12:58:56,772 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 213 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:58:56,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 41 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:58:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 12:58:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-03-20 12:58:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:58:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-03-20 12:58:56,785 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2022-03-20 12:58:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:58:56,785 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-03-20 12:58:56,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:58:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-03-20 12:58:56,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 12:58:56,786 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:58:56,786 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:58:56,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 12:58:56,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:58:56,992 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:58:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:58:56,992 INFO L85 PathProgramCache]: Analyzing trace with hash 497399052, now seen corresponding path program 59 times [2022-03-20 12:58:56,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:56,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [84971299] [2022-03-20 12:58:56,993 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:58:56,993 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:58:56,993 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:58:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash 497399052, now seen corresponding path program 60 times [2022-03-20 12:58:56,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:58:56,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48874954] [2022-03-20 12:58:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:58:56,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:58:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:57,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:58:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-03-20 12:58:57,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:58:57,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48874954] [2022-03-20 12:58:57,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48874954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:58:57,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107107955] [2022-03-20 12:58:57,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:58:57,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:58:57,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:58:57,369 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:58:57,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process