/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 11:27:43,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 11:27:43,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 11:27:43,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 11:27:43,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 11:27:43,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 11:27:43,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 11:27:43,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 11:27:43,238 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 11:27:43,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 11:27:43,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 11:27:43,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 11:27:43,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 11:27:43,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 11:27:43,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 11:27:43,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 11:27:43,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 11:27:43,240 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 11:27:43,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 11:27:43,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 11:27:43,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 11:27:43,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 11:27:43,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 11:27:43,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 11:27:43,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 11:27:43,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 11:27:43,241 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 11:27:43,241 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 11:27:43,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 11:27:43,241 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 11:27:43,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 11:27:43,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 11:27:43,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 11:27:43,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 11:27:43,465 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 11:27:43,468 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 11:27:43,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-03-19 11:27:43,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3367d2103/dc3ffede0cf34771865d072db9dc8070/FLAGa123d9901 [2022-03-19 11:27:43,897 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 11:27:43,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-03-19 11:27:43,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3367d2103/dc3ffede0cf34771865d072db9dc8070/FLAGa123d9901 [2022-03-19 11:27:43,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3367d2103/dc3ffede0cf34771865d072db9dc8070 [2022-03-19 11:27:43,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 11:27:43,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 11:27:43,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 11:27:43,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 11:27:43,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 11:27:43,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:27:43" (1/1) ... [2022-03-19 11:27:43,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1997cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:43, skipping insertion in model container [2022-03-19 11:27:43,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:27:43" (1/1) ... [2022-03-19 11:27:43,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 11:27:43,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 11:27:44,111 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-03-19 11:27:44,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 11:27:44,129 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 11:27:44,137 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-03-19 11:27:44,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 11:27:44,149 INFO L208 MainTranslator]: Completed translation [2022-03-19 11:27:44,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:44 WrapperNode [2022-03-19 11:27:44,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 11:27:44,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 11:27:44,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 11:27:44,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 11:27:44,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:44" (1/1) ... [2022-03-19 11:27:44,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:44" (1/1) ... [2022-03-19 11:27:44,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:44" (1/1) ... [2022-03-19 11:27:44,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:44" (1/1) ... [2022-03-19 11:27:44,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:44" (1/1) ... [2022-03-19 11:27:44,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:44" (1/1) ... [2022-03-19 11:27:44,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:44" (1/1) ... [2022-03-19 11:27:44,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 11:27:44,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 11:27:44,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 11:27:44,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 11:27:44,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:44" (1/1) ... [2022-03-19 11:27:44,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 11:27:44,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:27:44,200 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) [2022-03-19 11:27:44,202 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 [2022-03-19 11:27:44,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 11:27:44,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 11:27:44,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 11:27:44,231 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 11:27:44,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 11:27:44,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 11:27:44,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 11:27:44,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 11:27:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 11:27:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 11:27:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 11:27:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 11:27:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 11:27:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 11:27:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 11:27:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 11:27:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 11:27:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 11:27:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 11:27:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 11:27:44,280 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 11:27:44,282 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 11:27:44,377 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 11:27:44,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 11:27:44,388 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 11:27:44,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:27:44 BoogieIcfgContainer [2022-03-19 11:27:44,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 11:27:44,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 11:27:44,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 11:27:44,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 11:27:44,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:27:43" (1/3) ... [2022-03-19 11:27:44,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e5ea4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:27:44, skipping insertion in model container [2022-03-19 11:27:44,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:44" (2/3) ... [2022-03-19 11:27:44,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e5ea4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:27:44, skipping insertion in model container [2022-03-19 11:27:44,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:27:44" (3/3) ... [2022-03-19 11:27:44,411 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.c [2022-03-19 11:27:44,414 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 11:27:44,415 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 11:27:44,455 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 11:27:44,460 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 [2022-03-19 11:27:44,460 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 11:27:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 11:27:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 11:27:44,475 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:27:44,475 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:27:44,476 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:27:44,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:27:44,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2022-03-19 11:27:44,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:44,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [525266458] [2022-03-19 11:27:44,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:27:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 2 times [2022-03-19 11:27:44,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:27:44,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821238972] [2022-03-19 11:27:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:27:44,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:27:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:27:44,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:27:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:27:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 11:27:44,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:27:44,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821238972] [2022-03-19 11:27:44,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821238972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:44,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:44,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 11:27:44,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:27:44,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [525266458] [2022-03-19 11:27:44,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [525266458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:44,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:44,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 11:27:44,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562352237] [2022-03-19 11:27:44,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:27:44,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 11:27:44,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 11:27:44,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 11:27:44,719 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 11:27:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:27:44,793 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2022-03-19 11:27:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 11:27:44,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 11:27:44,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:27:44,801 INFO L225 Difference]: With dead ends: 57 [2022-03-19 11:27:44,801 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 11:27:44,803 INFO L911 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 [2022-03-19 11:27:44,806 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:27:44,806 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:27:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 11:27:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-19 11:27:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 11:27:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-19 11:27:44,832 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-19 11:27:44,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:27:44,833 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-19 11:27:44,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 11:27:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-19 11:27:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 11:27:44,834 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:27:44,834 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:27:44,834 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 11:27:44,834 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:27:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:27:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2022-03-19 11:27:44,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:44,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145779841] [2022-03-19 11:27:44,836 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:27:44,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 2 times [2022-03-19 11:27:44,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:27:44,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348922535] [2022-03-19 11:27:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:27:44,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:27:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:27:44,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:27:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:27:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 11:27:44,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:27:44,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348922535] [2022-03-19 11:27:44,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348922535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:44,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:44,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:27:44,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:27:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145779841] [2022-03-19 11:27:44,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145779841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:44,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:44,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:27:44,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081221678] [2022-03-19 11:27:44,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:27:44,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:27:44,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:44,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:27:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:27:44,936 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 11:27:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:27:45,076 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-03-19 11:27:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 11:27:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 11:27:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:27:45,078 INFO L225 Difference]: With dead ends: 41 [2022-03-19 11:27:45,078 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 11:27:45,078 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 11:27:45,079 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:27:45,080 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:27:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 11:27:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-19 11:27:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 11:27:45,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-19 11:27:45,091 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-19 11:27:45,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:27:45,091 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-19 11:27:45,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 11:27:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-19 11:27:45,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 11:27:45,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:27:45,092 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:27:45,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 11:27:45,092 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:27:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:27:45,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2022-03-19 11:27:45,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:45,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1851179918] [2022-03-19 11:27:45,094 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:27:45,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 2 times [2022-03-19 11:27:45,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:27:45,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811228638] [2022-03-19 11:27:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:27:45,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:27:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:27:45,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:27:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:27:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 11:27:45,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:27:45,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811228638] [2022-03-19 11:27:45,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811228638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:45,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:45,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 11:27:45,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:27:45,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1851179918] [2022-03-19 11:27:45,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1851179918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:45,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:45,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 11:27:45,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447407493] [2022-03-19 11:27:45,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:27:45,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:27:45,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:45,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:27:45,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 11:27:45,152 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 11:27:45,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:27:45,268 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-03-19 11:27:45,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 11:27:45,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 11:27:45,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:27:45,269 INFO L225 Difference]: With dead ends: 46 [2022-03-19 11:27:45,270 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 11:27:45,270 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:27:45,271 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:27:45,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:27:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 11:27:45,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 11:27:45,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 11:27:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-19 11:27:45,277 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-19 11:27:45,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:27:45,278 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-19 11:27:45,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 11:27:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-19 11:27:45,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 11:27:45,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:27:45,278 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:27:45,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 11:27:45,278 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:27:45,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:27:45,284 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2022-03-19 11:27:45,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:45,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [87353494] [2022-03-19 11:27:45,288 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:27:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 2 times [2022-03-19 11:27:45,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:27:45,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369492347] [2022-03-19 11:27:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:27:45,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:27:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:27:45,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:27:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:27:45,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 11:27:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:27:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 11:27:45,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:27:45,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369492347] [2022-03-19 11:27:45,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369492347] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:45,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:45,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:27:45,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:27:45,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [87353494] [2022-03-19 11:27:45,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [87353494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:45,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:45,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:27:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895050859] [2022-03-19 11:27:45,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:27:45,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:27:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:27:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:27:45,407 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 11:27:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:27:45,525 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-19 11:27:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 11:27:45,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-19 11:27:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:27:45,529 INFO L225 Difference]: With dead ends: 46 [2022-03-19 11:27:45,529 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 11:27:45,530 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 11:27:45,539 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:27:45,540 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:27:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 11:27:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-19 11:27:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 11:27:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-19 11:27:45,546 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-19 11:27:45,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:27:45,547 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-19 11:27:45,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 11:27:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-19 11:27:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 11:27:45,547 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:27:45,547 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:27:45,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 11:27:45,548 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:27:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:27:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2022-03-19 11:27:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149829863] [2022-03-19 11:27:45,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:27:45,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 2 times [2022-03-19 11:27:45,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:27:45,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714301888] [2022-03-19 11:27:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:27:45,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:27:45,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:27:45,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234385877] [2022-03-19 11:27:45,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:27:45,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:27:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:27:45,561 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) [2022-03-19 11:27:45,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 11:27:45,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:27:45,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:27:45,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 11:27:45,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:27:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 11:27:45,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 11:27:45,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:27:45,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714301888] [2022-03-19 11:27:45,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:27:45,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234385877] [2022-03-19 11:27:45,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234385877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:45,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:45,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:27:45,815 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:27:45,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [149829863] [2022-03-19 11:27:45,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [149829863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:45,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:45,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:27:45,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256477463] [2022-03-19 11:27:45,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:27:45,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:27:45,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:45,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:27:45,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 11:27:45,816 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 11:27:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:27:45,869 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-03-19 11:27:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:27:45,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-19 11:27:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:27:45,870 INFO L225 Difference]: With dead ends: 65 [2022-03-19 11:27:45,870 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 11:27:45,871 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:27:45,871 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:27:45,871 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:27:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 11:27:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-19 11:27:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 11:27:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-19 11:27:45,879 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-19 11:27:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:27:45,879 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-19 11:27:45,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 11:27:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-19 11:27:45,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 11:27:45,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:27:45,880 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:27:45,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 11:27:46,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:27:46,101 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:27:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:27:46,102 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2022-03-19 11:27:46,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:46,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [165800044] [2022-03-19 11:27:46,102 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:27:46,102 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 2 times [2022-03-19 11:27:46,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:27:46,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587820359] [2022-03-19 11:27:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:27:46,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:27:46,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:27:46,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921296333] [2022-03-19 11:27:46,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:27:46,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:27:46,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:27:46,119 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) [2022-03-19 11:27:46,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 11:27:46,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:27:46,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:27:46,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 11:27:46,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:27:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 11:27:46,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 11:27:46,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:27:46,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587820359] [2022-03-19 11:27:46,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:27:46,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921296333] [2022-03-19 11:27:46,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921296333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:46,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:46,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:27:46,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:27:46,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [165800044] [2022-03-19 11:27:46,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [165800044] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:46,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:46,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:27:46,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446544591] [2022-03-19 11:27:46,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:27:46,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:27:46,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:46,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:27:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 11:27:46,250 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 11:27:46,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:27:46,285 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-03-19 11:27:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:27:46,286 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), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-19 11:27:46,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:27:46,288 INFO L225 Difference]: With dead ends: 70 [2022-03-19 11:27:46,288 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 11:27:46,289 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 11:27:46,290 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:27:46,291 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:27:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 11:27:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-19 11:27:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 11:27:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-19 11:27:46,307 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-03-19 11:27:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:27:46,307 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-19 11:27:46,307 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), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 11:27:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-19 11:27:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 11:27:46,308 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:27:46,308 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:27:46,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 11:27:46,529 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,SelfDestructingSolverStorable5 [2022-03-19 11:27:46,530 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:27:46,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:27:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 1 times [2022-03-19 11:27:46,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:46,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1004339541] [2022-03-19 11:27:46,532 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:27:46,532 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 2 times [2022-03-19 11:27:46,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:27:46,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83328182] [2022-03-19 11:27:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:27:46,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:27:46,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:27:46,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515761368] [2022-03-19 11:27:46,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:27:46,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:27:46,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:27:46,548 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) [2022-03-19 11:27:46,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 11:27:46,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:27:46,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:27:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 11:27:46,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:27:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 11:27:46,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 11:27:46,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:27:46,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83328182] [2022-03-19 11:27:46,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:27:46,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515761368] [2022-03-19 11:27:46,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515761368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:46,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:46,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:27:46,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:27:46,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1004339541] [2022-03-19 11:27:46,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1004339541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:46,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:46,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:27:46,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968626496] [2022-03-19 11:27:46,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:27:46,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:27:46,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:27:46,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 11:27:46,666 INFO L87 Difference]: Start difference. First operand 62 states and 72 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 11:27:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:27:46,704 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-03-19 11:27:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:27:46,704 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-19 11:27:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:27:46,705 INFO L225 Difference]: With dead ends: 76 [2022-03-19 11:27:46,705 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 11:27:46,705 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:27:46,706 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:27:46,706 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:27:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 11:27:46,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-19 11:27:46,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 11:27:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-19 11:27:46,717 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-03-19 11:27:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:27:46,717 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-19 11:27:46,717 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 11:27:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-19 11:27:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 11:27:46,718 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:27:46,718 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:27:46,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-19 11:27:46,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:27:46,935 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:27:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:27:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2022-03-19 11:27:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:46,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1780577122] [2022-03-19 11:27:47,435 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 11:27:47,436 INFO L85 PathProgramCache]: Analyzing trace with hash -861149586, now seen corresponding path program 1 times [2022-03-19 11:27:47,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:27:47,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232136197] [2022-03-19 11:27:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:27:47,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:27:47,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:27:47,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972237330] [2022-03-19 11:27:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:27:47,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:27:47,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:27:47,467 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) [2022-03-19 11:27:47,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 11:27:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:27:47,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 11:27:47,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:27:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 11:27:47,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 11:27:47,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:27:47,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232136197] [2022-03-19 11:27:47,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:27:47,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972237330] [2022-03-19 11:27:47,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972237330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:47,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:47,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:27:47,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:27:47,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1780577122] [2022-03-19 11:27:47,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1780577122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:27:47,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:27:47,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 11:27:47,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286062880] [2022-03-19 11:27:47,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:27:47,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 11:27:47,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 11:27:47,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-19 11:27:47,983 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 11:27:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:27:48,928 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2022-03-19 11:27:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 11:27:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2022-03-19 11:27:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:27:48,931 INFO L225 Difference]: With dead ends: 90 [2022-03-19 11:27:48,931 INFO L226 Difference]: Without dead ends: 65 [2022-03-19 11:27:48,932 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-19 11:27:48,932 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 11:27:48,932 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 293 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 11:27:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-19 11:27:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-19 11:27:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 11:27:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-03-19 11:27:48,943 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2022-03-19 11:27:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:27:48,945 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-03-19 11:27:48,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 11:27:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-03-19 11:27:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 11:27:48,948 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:27:48,948 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:27:48,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 11:27:49,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:27:49,148 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:27:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:27:49,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 1 times [2022-03-19 11:27:49,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:27:49,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1280204779] [2022-03-19 11:29:02,050 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 11:29:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash 449890654, now seen corresponding path program 1 times [2022-03-19 11:29:02,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:29:02,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852452053] [2022-03-19 11:29:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:29:02,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:29:02,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:29:02,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180476390] [2022-03-19 11:29:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:29:02,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:29:02,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:29:02,073 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) [2022-03-19 11:29:02,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 11:29:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:29:02,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 11:29:02,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:29:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 11:29:02,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 11:29:02,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:29:02,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852452053] [2022-03-19 11:29:02,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:29:02,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180476390] [2022-03-19 11:29:02,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180476390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:29:02,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:29:02,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:29:02,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:29:02,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1280204779] [2022-03-19 11:29:02,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1280204779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:29:02,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:29:02,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 11:29:02,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048367213] [2022-03-19 11:29:02,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:29:02,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 11:29:02,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:29:02,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 11:29:02,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-19 11:29:02,451 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 11:29:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:29:02,646 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2022-03-19 11:29:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 11:29:02,647 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2022-03-19 11:29:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:29:02,648 INFO L225 Difference]: With dead ends: 105 [2022-03-19 11:29:02,648 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 11:29:02,648 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-19 11:29:02,649 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:29:02,649 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 250 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:29:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 11:29:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-19 11:29:02,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 11:29:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-03-19 11:29:02,657 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 40 [2022-03-19 11:29:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:29:02,657 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-03-19 11:29:02,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 11:29:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-03-19 11:29:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 11:29:02,671 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:29:02,672 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:29:02,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 11:29:02,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:29:02,889 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:29:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:29:02,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1864650262, now seen corresponding path program 2 times [2022-03-19 11:29:02,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:29:02,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1729895632]