/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:01:09,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:01:09,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:01:09,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:01:09,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 23:01:09,649 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:01:09,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:01:09,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:01:09,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:01:09,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:01:09,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:01:09,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:01:09,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:01:09,650 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:01:09,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:01:09,650 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:01:09,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:01:09,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:01:09,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:01:09,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:01:09,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:01:09,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:01:09,656 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:01:09,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:01:09,656 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:01:09,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:01:09,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:01:09,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:01:09,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:01:09,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:01:09,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:01:09,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:01:09,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:01:09,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:01:09,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:01:09,658 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:01:09,658 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:01:09,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:01:09,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:01:09,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:01:09,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:01:09,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:01:09,881 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:01:09,883 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:01:09,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c [2022-03-19 23:01:09,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8c017884/dcdeef9f5ed647b5a753c6387a668cfa/FLAGa2d518625 [2022-03-19 23:01:10,225 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:01:10,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c [2022-03-19 23:01:10,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8c017884/dcdeef9f5ed647b5a753c6387a668cfa/FLAGa2d518625 [2022-03-19 23:01:10,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8c017884/dcdeef9f5ed647b5a753c6387a668cfa [2022-03-19 23:01:10,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:01:10,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:01:10,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:01:10,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:01:10,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:01:10,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:01:10" (1/1) ... [2022-03-19 23:01:10,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:10, skipping insertion in model container [2022-03-19 23:01:10,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:01:10" (1/1) ... [2022-03-19 23:01:10,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:01:10,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:01:10,810 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c[368,381] [2022-03-19 23:01:10,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:01:10,823 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:01:10,830 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c[368,381] [2022-03-19 23:01:10,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:01:10,840 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:01:10,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:10 WrapperNode [2022-03-19 23:01:10,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:01:10,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:01:10,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:01:10,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:01:10,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:10" (1/1) ... [2022-03-19 23:01:10,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:10" (1/1) ... [2022-03-19 23:01:10,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:10" (1/1) ... [2022-03-19 23:01:10,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:10" (1/1) ... [2022-03-19 23:01:10,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:10" (1/1) ... [2022-03-19 23:01:10,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:10" (1/1) ... [2022-03-19 23:01:10,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:10" (1/1) ... [2022-03-19 23:01:10,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:01:10,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:01:10,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:01:10,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:01:10,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:10" (1/1) ... [2022-03-19 23:01:10,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:01:10,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:10,892 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 23:01:10,901 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 23:01:10,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:01:10,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:01:10,919 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:01:10,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:01:10,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:01:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:01:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:01:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:01:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:01:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 23:01:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:01:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:01:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:01:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:01:10,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:01:10,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:01:10,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:01:10,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:01:10,962 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:01:10,963 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:01:11,047 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:01:11,050 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:01:11,050 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-19 23:01:11,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:01:11 BoogieIcfgContainer [2022-03-19 23:01:11,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:01:11,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:01:11,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:01:11,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:01:11,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:01:10" (1/3) ... [2022-03-19 23:01:11,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a8b798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:01:11, skipping insertion in model container [2022-03-19 23:01:11,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:10" (2/3) ... [2022-03-19 23:01:11,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a8b798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:01:11, skipping insertion in model container [2022-03-19 23:01:11,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:01:11" (3/3) ... [2022-03-19 23:01:11,056 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de62.c [2022-03-19 23:01:11,059 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:01:11,060 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:01:11,101 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:01:11,106 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 23:01:11,106 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:01:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:01:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 23:01:11,118 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:11,118 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:11,119 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:11,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1370249117, now seen corresponding path program 1 times [2022-03-19 23:01:11,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:11,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788354088] [2022-03-19 23:01:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:11,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:11,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:11,280 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 23:01:11,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:11,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788354088] [2022-03-19 23:01:11,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788354088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:01:11,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:01:11,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:01:11,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994962009] [2022-03-19 23:01:11,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:01:11,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:01:11,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:11,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:01:11,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:01:11,311 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states 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 23:01:11,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:11,351 INFO L93 Difference]: Finished difference Result 43 states and 66 transitions. [2022-03-19 23:01:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:01:11,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 23:01:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:11,358 INFO L225 Difference]: With dead ends: 43 [2022-03-19 23:01:11,358 INFO L226 Difference]: Without dead ends: 18 [2022-03-19 23:01:11,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:01:11,365 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:11,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:01:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-19 23:01:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-19 23:01:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2022-03-19 23:01:11,391 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 17 [2022-03-19 23:01:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:11,391 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2022-03-19 23:01:11,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states 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 23:01:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2022-03-19 23:01:11,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 23:01:11,393 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:11,393 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:11,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:01:11,393 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:11,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:11,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2115201689, now seen corresponding path program 1 times [2022-03-19 23:01:11,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:11,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431399956] [2022-03-19 23:01:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:11,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:11,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:11,496 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 23:01:11,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:11,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431399956] [2022-03-19 23:01:11,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431399956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:01:11,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:01:11,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 23:01:11,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010855844] [2022-03-19 23:01:11,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:01:11,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 23:01:11,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:11,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 23:01:11,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:01:11,503 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states 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 23:01:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:11,601 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-03-19 23:01:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:01:11,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 23:01:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:11,602 INFO L225 Difference]: With dead ends: 34 [2022-03-19 23:01:11,602 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 23:01:11,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:01:11,603 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:11,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:01:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 23:01:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-19 23:01:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-03-19 23:01:11,610 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 17 [2022-03-19 23:01:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:11,611 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-03-19 23:01:11,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states 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 23:01:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-03-19 23:01:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 23:01:11,613 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:11,613 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:11,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:01:11,613 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:11,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:11,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1181238037, now seen corresponding path program 1 times [2022-03-19 23:01:11,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:11,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372667155] [2022-03-19 23:01:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:11,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:11,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:01:11,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:11,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372667155] [2022-03-19 23:01:11,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372667155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:01:11,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:01:11,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:01:11,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011857548] [2022-03-19 23:01:11,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:01:11,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:01:11,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:11,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:01:11,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:01:11,674 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:11,722 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2022-03-19 23:01:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:01:11,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-19 23:01:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:11,723 INFO L225 Difference]: With dead ends: 47 [2022-03-19 23:01:11,724 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 23:01:11,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:01:11,725 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:11,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 25 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:01:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 23:01:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 23:01:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2022-03-19 23:01:11,730 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 18 [2022-03-19 23:01:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:11,730 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2022-03-19 23:01:11,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2022-03-19 23:01:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 23:01:11,731 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:11,731 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:11,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 23:01:11,731 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:11,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1710900860, now seen corresponding path program 1 times [2022-03-19 23:01:11,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:11,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619970073] [2022-03-19 23:01:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:11,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:11,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:01:11,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:11,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619970073] [2022-03-19 23:01:11,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619970073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:01:11,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:01:11,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:01:11,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083855377] [2022-03-19 23:01:11,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:01:11,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:01:11,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:11,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:01:11,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:01:11,762 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:11,790 INFO L93 Difference]: Finished difference Result 49 states and 69 transitions. [2022-03-19 23:01:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:01:11,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-19 23:01:11,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:11,791 INFO L225 Difference]: With dead ends: 49 [2022-03-19 23:01:11,791 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 23:01:11,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:01:11,792 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:11,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 28 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:01:11,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 23:01:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 23:01:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2022-03-19 23:01:11,797 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 18 [2022-03-19 23:01:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:11,797 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2022-03-19 23:01:11,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:11,797 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2022-03-19 23:01:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 23:01:11,798 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:11,798 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:11,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 23:01:11,798 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:11,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:11,798 INFO L85 PathProgramCache]: Analyzing trace with hash 375506293, now seen corresponding path program 1 times [2022-03-19 23:01:11,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:11,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119587489] [2022-03-19 23:01:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:11,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:11,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:11,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:11,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119587489] [2022-03-19 23:01:11,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119587489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:01:11,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:01:11,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:01:11,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141305854] [2022-03-19 23:01:11,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:01:11,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:01:11,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:11,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:01:11,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:01:11,848 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:11,926 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-19 23:01:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:01:11,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-19 23:01:11,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:11,927 INFO L225 Difference]: With dead ends: 47 [2022-03-19 23:01:11,927 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 23:01:11,928 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-19 23:01:11,928 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:11,929 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:01:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 23:01:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 23:01:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2022-03-19 23:01:11,933 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 20 [2022-03-19 23:01:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:11,933 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2022-03-19 23:01:11,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2022-03-19 23:01:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 23:01:11,933 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:11,933 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:11,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 23:01:11,934 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:11,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1300031754, now seen corresponding path program 1 times [2022-03-19 23:01:11,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:11,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475997291] [2022-03-19 23:01:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:11,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:12,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:12,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:12,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475997291] [2022-03-19 23:01:12,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475997291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:12,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146618002] [2022-03-19 23:01:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:12,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:12,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:12,067 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 23:01:12,077 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 23:01:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:12,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 23:01:12,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:12,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:12,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146618002] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:12,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:01:12,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-03-19 23:01:12,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442911000] [2022-03-19 23:01:12,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:01:12,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:01:12,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:12,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:01:12,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:01:12,251 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:12,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:12,278 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-03-19 23:01:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:01:12,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-19 23:01:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:12,279 INFO L225 Difference]: With dead ends: 41 [2022-03-19 23:01:12,279 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 23:01:12,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:01:12,280 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:12,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:01:12,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 23:01:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 23:01:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2022-03-19 23:01:12,284 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 20 [2022-03-19 23:01:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:12,284 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2022-03-19 23:01:12,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2022-03-19 23:01:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 23:01:12,285 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:12,285 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:12,301 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 23:01:12,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-19 23:01:12,505 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:12,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:12,505 INFO L85 PathProgramCache]: Analyzing trace with hash 30273528, now seen corresponding path program 1 times [2022-03-19 23:01:12,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:12,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267829465] [2022-03-19 23:01:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:12,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:12,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:01:12,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:12,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267829465] [2022-03-19 23:01:12,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267829465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:12,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081984646] [2022-03-19 23:01:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:12,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:12,554 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 23:01:12,555 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 23:01:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 23:01:12,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:01:12,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:01:12,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081984646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:12,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:12,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2022-03-19 23:01:12,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076825469] [2022-03-19 23:01:12,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:12,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 23:01:12,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:12,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 23:01:12,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:01:12,716 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:12,996 INFO L93 Difference]: Finished difference Result 100 states and 154 transitions. [2022-03-19 23:01:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 23:01:12,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 23:01:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:12,999 INFO L225 Difference]: With dead ends: 100 [2022-03-19 23:01:12,999 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 23:01:12,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2022-03-19 23:01:13,000 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:13,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 51 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:01:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 23:01:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2022-03-19 23:01:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.509433962264151) internal successors, (80), 53 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2022-03-19 23:01:13,018 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 21 [2022-03-19 23:01:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:13,018 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2022-03-19 23:01:13,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2022-03-19 23:01:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 23:01:13,019 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:13,019 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:13,053 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 23:01:13,219 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,SelfDestructingSolverStorable6 [2022-03-19 23:01:13,220 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1232820840, now seen corresponding path program 1 times [2022-03-19 23:01:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:13,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709090043] [2022-03-19 23:01:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:13,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:13,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:13,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:13,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709090043] [2022-03-19 23:01:13,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709090043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229112929] [2022-03-19 23:01:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:13,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:13,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:13,282 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 23:01:13,286 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 23:01:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:13,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 23:01:13,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:13,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:13,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229112929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:13,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:13,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-19 23:01:13,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242022830] [2022-03-19 23:01:13,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:13,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:01:13,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:13,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:01:13,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:01:13,426 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:13,494 INFO L93 Difference]: Finished difference Result 101 states and 146 transitions. [2022-03-19 23:01:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:01:13,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 23:01:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:13,495 INFO L225 Difference]: With dead ends: 101 [2022-03-19 23:01:13,495 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 23:01:13,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 23:01:13,496 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:13,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:01:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 23:01:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2022-03-19 23:01:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.4923076923076923) internal successors, (97), 65 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2022-03-19 23:01:13,504 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 21 [2022-03-19 23:01:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:13,504 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2022-03-19 23:01:13,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2022-03-19 23:01:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 23:01:13,505 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:13,505 INFO L499 BasicCegarLoop]: trace histogram [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 23:01:13,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:13,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:13,743 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:13,743 INFO L85 PathProgramCache]: Analyzing trace with hash -29884763, now seen corresponding path program 1 times [2022-03-19 23:01:13,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:13,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164379338] [2022-03-19 23:01:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:13,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:13,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:13,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:13,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164379338] [2022-03-19 23:01:13,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164379338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:13,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082196705] [2022-03-19 23:01:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:13,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:13,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:13,827 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 23:01:13,836 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 23:01:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:13,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:01:13,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:01:13,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:01:14,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082196705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:14,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:14,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2022-03-19 23:01:14,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511865660] [2022-03-19 23:01:14,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:14,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 23:01:14,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:14,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 23:01:14,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:01:14,067 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:14,320 INFO L93 Difference]: Finished difference Result 141 states and 212 transitions. [2022-03-19 23:01:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 23:01:14,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-19 23:01:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:14,321 INFO L225 Difference]: With dead ends: 141 [2022-03-19 23:01:14,321 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 23:01:14,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-03-19 23:01:14,322 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:14,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:01:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 23:01:14,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2022-03-19 23:01:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4333333333333333) internal successors, (129), 90 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2022-03-19 23:01:14,330 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 22 [2022-03-19 23:01:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:14,330 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2022-03-19 23:01:14,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2022-03-19 23:01:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 23:01:14,331 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:14,331 INFO L499 BasicCegarLoop]: trace histogram [1, 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 23:01:14,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-19 23:01:14,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:14,547 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash -353925126, now seen corresponding path program 1 times [2022-03-19 23:01:14,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:14,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720054618] [2022-03-19 23:01:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:14,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:14,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:14,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:14,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720054618] [2022-03-19 23:01:14,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720054618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:14,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445209904] [2022-03-19 23:01:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:14,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:14,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:14,611 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 23:01:14,612 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 23:01:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:14,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:01:14,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:01:14,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:01:14,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445209904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:14,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:14,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-03-19 23:01:14,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860823134] [2022-03-19 23:01:14,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:14,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 23:01:14,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:14,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 23:01:14,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:01:14,736 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:14,841 INFO L93 Difference]: Finished difference Result 147 states and 212 transitions. [2022-03-19 23:01:14,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:01:14,841 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 23:01:14,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:14,842 INFO L225 Difference]: With dead ends: 147 [2022-03-19 23:01:14,842 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 23:01:14,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-19 23:01:14,844 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:14,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 47 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:01:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 23:01:14,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2022-03-19 23:01:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 75 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 114 transitions. [2022-03-19 23:01:14,858 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 114 transitions. Word has length 23 [2022-03-19 23:01:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:14,858 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 114 transitions. [2022-03-19 23:01:14,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 114 transitions. [2022-03-19 23:01:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 23:01:14,860 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:14,860 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:14,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 23:01:15,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 23:01:15,096 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:15,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:15,096 INFO L85 PathProgramCache]: Analyzing trace with hash -277419979, now seen corresponding path program 2 times [2022-03-19 23:01:15,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:15,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058139964] [2022-03-19 23:01:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:15,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:15,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 23:01:15,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:15,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058139964] [2022-03-19 23:01:15,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058139964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:15,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506397190] [2022-03-19 23:01:15,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:01:15,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:15,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:15,184 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:15,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:01:15,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:01:15,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:01:15,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 23:01:15,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 23:01:15,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506397190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:15,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:15,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-03-19 23:01:15,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537882857] [2022-03-19 23:01:15,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:15,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 23:01:15,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:15,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 23:01:15,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:01:15,355 INFO L87 Difference]: Start difference. First operand 80 states and 114 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:15,572 INFO L93 Difference]: Finished difference Result 135 states and 198 transitions. [2022-03-19 23:01:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 23:01:15,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-19 23:01:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:15,573 INFO L225 Difference]: With dead ends: 135 [2022-03-19 23:01:15,573 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 23:01:15,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-03-19 23:01:15,574 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:15,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 57 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:01:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 23:01:15,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2022-03-19 23:01:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 70 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 108 transitions. [2022-03-19 23:01:15,579 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 108 transitions. Word has length 24 [2022-03-19 23:01:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:15,580 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 108 transitions. [2022-03-19 23:01:15,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 108 transitions. [2022-03-19 23:01:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 23:01:15,580 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:15,580 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:15,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:15,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:15,781 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:15,781 INFO L85 PathProgramCache]: Analyzing trace with hash 489571588, now seen corresponding path program 2 times [2022-03-19 23:01:15,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:15,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317954768] [2022-03-19 23:01:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:15,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:15,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:01:15,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:15,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317954768] [2022-03-19 23:01:15,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317954768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:15,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753225846] [2022-03-19 23:01:15,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:01:15,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:15,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:15,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:01:15,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:01:15,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:15,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 23:01:15,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:01:15,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:01:15,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753225846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:15,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:15,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-03-19 23:01:15,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509563312] [2022-03-19 23:01:15,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:15,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 23:01:15,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 23:01:15,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-19 23:01:15,960 INFO L87 Difference]: Start difference. First operand 75 states and 108 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:16,537 INFO L93 Difference]: Finished difference Result 162 states and 241 transitions. [2022-03-19 23:01:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 23:01:16,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-19 23:01:16,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:16,538 INFO L225 Difference]: With dead ends: 162 [2022-03-19 23:01:16,538 INFO L226 Difference]: Without dead ends: 127 [2022-03-19 23:01:16,539 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:01:16,539 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:16,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 74 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:01:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-19 23:01:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2022-03-19 23:01:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.3595505617977528) internal successors, (121), 89 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2022-03-19 23:01:16,549 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 24 [2022-03-19 23:01:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:16,549 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2022-03-19 23:01:16,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2022-03-19 23:01:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 23:01:16,551 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:16,551 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:16,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:16,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:16,751 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1340816406, now seen corresponding path program 3 times [2022-03-19 23:01:16,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:16,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547479613] [2022-03-19 23:01:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:16,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:16,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 23:01:16,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:16,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547479613] [2022-03-19 23:01:16,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547479613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:16,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2719672] [2022-03-19 23:01:16,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:01:16,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:16,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:16,895 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:16,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:01:16,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-19 23:01:16,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 23:01:16,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 23:01:17,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 23:01:17,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2719672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:17,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:17,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 15 [2022-03-19 23:01:17,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594355087] [2022-03-19 23:01:17,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:17,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 23:01:17,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:17,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 23:01:17,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:01:17,124 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:17,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:17,729 INFO L93 Difference]: Finished difference Result 199 states and 288 transitions. [2022-03-19 23:01:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 23:01:17,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-19 23:01:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:17,731 INFO L225 Difference]: With dead ends: 199 [2022-03-19 23:01:17,731 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 23:01:17,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 23:01:17,732 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:17,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 89 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:01:17,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 23:01:17,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2022-03-19 23:01:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.4352941176470588) internal successors, (122), 85 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2022-03-19 23:01:17,738 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 26 [2022-03-19 23:01:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:17,738 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2022-03-19 23:01:17,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2022-03-19 23:01:17,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 23:01:17,738 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:17,738 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:17,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:17,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 23:01:17,939 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:17,940 INFO L85 PathProgramCache]: Analyzing trace with hash -812701032, now seen corresponding path program 3 times [2022-03-19 23:01:17,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:17,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861492202] [2022-03-19 23:01:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:17,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:18,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:01:18,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861492202] [2022-03-19 23:01:18,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861492202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:18,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300898493] [2022-03-19 23:01:18,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:01:18,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:18,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:18,072 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:18,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:01:18,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 23:01:18,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:18,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:01:18,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 23:01:18,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 23:01:18,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300898493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:18,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:18,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-03-19 23:01:18,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716662718] [2022-03-19 23:01:18,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:18,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 23:01:18,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 23:01:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:01:18,232 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:19,376 INFO L93 Difference]: Finished difference Result 200 states and 291 transitions. [2022-03-19 23:01:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 23:01:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 23:01:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:19,377 INFO L225 Difference]: With dead ends: 200 [2022-03-19 23:01:19,377 INFO L226 Difference]: Without dead ends: 163 [2022-03-19 23:01:19,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=460, Invalid=3080, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 23:01:19,378 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 109 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:19,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 88 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:01:19,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-19 23:01:19,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2022-03-19 23:01:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.3396226415094339) internal successors, (142), 106 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 146 transitions. [2022-03-19 23:01:19,385 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 146 transitions. Word has length 27 [2022-03-19 23:01:19,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:19,385 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 146 transitions. [2022-03-19 23:01:19,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:19,385 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 146 transitions. [2022-03-19 23:01:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 23:01:19,386 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:19,386 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:19,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:19,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 23:01:19,602 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1851792245, now seen corresponding path program 4 times [2022-03-19 23:01:19,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:19,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567268340] [2022-03-19 23:01:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:19,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:19,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 23:01:19,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567268340] [2022-03-19 23:01:19,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567268340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901433365] [2022-03-19 23:01:19,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:01:19,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:19,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:19,695 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:19,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 23:01:19,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:01:19,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:19,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 23:01:19,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:01:19,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:01:19,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901433365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:19,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:19,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 5] total 14 [2022-03-19 23:01:19,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060814890] [2022-03-19 23:01:19,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:19,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 23:01:19,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:19,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 23:01:19,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:01:19,879 INFO L87 Difference]: Start difference. First operand 111 states and 146 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:20,296 INFO L93 Difference]: Finished difference Result 294 states and 436 transitions. [2022-03-19 23:01:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 23:01:20,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 23:01:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:20,297 INFO L225 Difference]: With dead ends: 294 [2022-03-19 23:01:20,297 INFO L226 Difference]: Without dead ends: 244 [2022-03-19 23:01:20,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:01:20,298 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 121 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:20,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 75 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:01:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-19 23:01:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2022-03-19 23:01:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4) internal successors, (238), 170 states have internal predecessors, (238), 3 states have call successors, (3), 3 states 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 23:01:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 242 transitions. [2022-03-19 23:01:20,306 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 242 transitions. Word has length 28 [2022-03-19 23:01:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:20,306 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 242 transitions. [2022-03-19 23:01:20,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 242 transitions. [2022-03-19 23:01:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 23:01:20,307 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:20,307 INFO L499 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:20,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:20,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 23:01:20,523 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:20,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1700492953, now seen corresponding path program 1 times [2022-03-19 23:01:20,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:20,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567196675] [2022-03-19 23:01:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:20,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:20,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 23:01:20,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:20,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567196675] [2022-03-19 23:01:20,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567196675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:20,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179891493] [2022-03-19 23:01:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:20,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:20,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:20,631 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:20,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 23:01:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 23:01:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 23:01:20,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 23:01:20,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179891493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:20,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:20,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-19 23:01:20,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163299342] [2022-03-19 23:01:20,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:20,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 23:01:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 23:01:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-03-19 23:01:20,872 INFO L87 Difference]: Start difference. First operand 175 states and 242 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:26,802 INFO L93 Difference]: Finished difference Result 517 states and 800 transitions. [2022-03-19 23:01:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-19 23:01:26,802 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 23:01:26,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:26,804 INFO L225 Difference]: With dead ends: 517 [2022-03-19 23:01:26,804 INFO L226 Difference]: Without dead ends: 428 [2022-03-19 23:01:26,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4991 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2648, Invalid=11158, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 23:01:26,808 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 359 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:26,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 105 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:01:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-03-19 23:01:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 232. [2022-03-19 23:01:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.4273127753303965) internal successors, (324), 227 states have internal predecessors, (324), 3 states have call successors, (3), 3 states 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 23:01:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 328 transitions. [2022-03-19 23:01:26,837 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 328 transitions. Word has length 29 [2022-03-19 23:01:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:26,837 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 328 transitions. [2022-03-19 23:01:26,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 328 transitions. [2022-03-19 23:01:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 23:01:26,838 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:26,838 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:26,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-19 23:01:27,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 23:01:27,042 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1141944188, now seen corresponding path program 4 times [2022-03-19 23:01:27,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045580898] [2022-03-19 23:01:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:27,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:27,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:01:27,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:27,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045580898] [2022-03-19 23:01:27,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045580898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:27,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357673873] [2022-03-19 23:01:27,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:01:27,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:27,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:27,201 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:27,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 23:01:27,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:01:27,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 23:01:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:01:27,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:01:27,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357673873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:27,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:27,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 19 [2022-03-19 23:01:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738725872] [2022-03-19 23:01:27,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:27,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 23:01:27,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 23:01:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2022-03-19 23:01:27,380 INFO L87 Difference]: Start difference. First operand 232 states and 328 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:30,491 INFO L93 Difference]: Finished difference Result 613 states and 894 transitions. [2022-03-19 23:01:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-19 23:01:30,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 23:01:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:30,501 INFO L225 Difference]: With dead ends: 613 [2022-03-19 23:01:30,501 INFO L226 Difference]: Without dead ends: 551 [2022-03-19 23:01:30,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5297 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1425, Invalid=13337, Unknown=0, NotChecked=0, Total=14762 [2022-03-19 23:01:30,505 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 224 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:30,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 96 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:01:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-19 23:01:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 262. [2022-03-19 23:01:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.4319066147859922) internal successors, (368), 257 states have internal predecessors, (368), 3 states have call successors, (3), 3 states 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 23:01:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 372 transitions. [2022-03-19 23:01:30,519 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 372 transitions. Word has length 30 [2022-03-19 23:01:30,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:30,519 INFO L478 AbstractCegarLoop]: Abstraction has 262 states and 372 transitions. [2022-03-19 23:01:30,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 372 transitions. [2022-03-19 23:01:30,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 23:01:30,520 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:30,520 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:30,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:30,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 23:01:30,735 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash -379865510, now seen corresponding path program 2 times [2022-03-19 23:01:30,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:30,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398706391] [2022-03-19 23:01:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:30,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:30,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 23:01:30,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398706391] [2022-03-19 23:01:30,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398706391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588847563] [2022-03-19 23:01:30,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:01:30,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:30,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:30,860 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:30,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 23:01:30,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:01:30,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:30,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:01:30,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:01:30,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:01:31,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588847563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:31,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:31,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 13 [2022-03-19 23:01:31,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100165915] [2022-03-19 23:01:31,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:31,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 23:01:31,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 23:01:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-19 23:01:31,060 INFO L87 Difference]: Start difference. First operand 262 states and 372 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:31,437 INFO L93 Difference]: Finished difference Result 478 states and 664 transitions. [2022-03-19 23:01:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 23:01:31,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 23:01:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:31,444 INFO L225 Difference]: With dead ends: 478 [2022-03-19 23:01:31,444 INFO L226 Difference]: Without dead ends: 445 [2022-03-19 23:01:31,444 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2022-03-19 23:01:31,445 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 81 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:31,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 64 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:01:31,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-03-19 23:01:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 273. [2022-03-19 23:01:31,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.414179104477612) internal successors, (379), 268 states have internal predecessors, (379), 3 states have call successors, (3), 3 states 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 23:01:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 383 transitions. [2022-03-19 23:01:31,487 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 383 transitions. Word has length 31 [2022-03-19 23:01:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:31,488 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 383 transitions. [2022-03-19 23:01:31,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 383 transitions. [2022-03-19 23:01:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 23:01:31,488 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:31,488 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:31,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-19 23:01:31,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 23:01:31,689 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1142429803, now seen corresponding path program 5 times [2022-03-19 23:01:31,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:31,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103295042] [2022-03-19 23:01:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:31,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:31,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 23:01:31,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:31,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103295042] [2022-03-19 23:01:31,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103295042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:31,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448792059] [2022-03-19 23:01:31,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:01:31,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:31,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:31,886 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:31,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 23:01:32,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-19 23:01:32,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:32,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:01:32,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:32,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-19 23:01:32,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448792059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:32,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:32,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 10] total 28 [2022-03-19 23:01:32,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964621340] [2022-03-19 23:01:32,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:32,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 23:01:32,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:32,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 23:01:32,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2022-03-19 23:01:32,280 INFO L87 Difference]: Start difference. First operand 273 states and 383 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:33,197 INFO L93 Difference]: Finished difference Result 543 states and 797 transitions. [2022-03-19 23:01:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 23:01:33,198 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 23:01:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:33,199 INFO L225 Difference]: With dead ends: 543 [2022-03-19 23:01:33,199 INFO L226 Difference]: Without dead ends: 479 [2022-03-19 23:01:33,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=3610, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:01:33,201 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 282 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:33,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 90 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:01:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-03-19 23:01:33,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 333. [2022-03-19 23:01:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.4359756097560976) internal successors, (471), 328 states have internal predecessors, (471), 3 states have call successors, (3), 3 states 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 23:01:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 475 transitions. [2022-03-19 23:01:33,227 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 475 transitions. Word has length 32 [2022-03-19 23:01:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:33,227 INFO L478 AbstractCegarLoop]: Abstraction has 333 states and 475 transitions. [2022-03-19 23:01:33,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 475 transitions. [2022-03-19 23:01:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 23:01:33,228 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:33,228 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:33,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-19 23:01:33,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:33,447 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash -2118455400, now seen corresponding path program 6 times [2022-03-19 23:01:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:33,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367157790] [2022-03-19 23:01:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:33,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:01:33,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367157790] [2022-03-19 23:01:33,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367157790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253002188] [2022-03-19 23:01:33,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:01:33,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:33,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:33,604 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:33,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 23:01:33,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 23:01:33,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:33,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 23:01:33,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:01:33,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:01:33,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253002188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:33,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:33,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 22 [2022-03-19 23:01:33,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224386100] [2022-03-19 23:01:33,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:33,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 23:01:33,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:33,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 23:01:33,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2022-03-19 23:01:33,835 INFO L87 Difference]: Start difference. First operand 333 states and 475 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:42,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:42,158 INFO L93 Difference]: Finished difference Result 951 states and 1365 transitions. [2022-03-19 23:01:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-03-19 23:01:42,158 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-19 23:01:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:42,160 INFO L225 Difference]: With dead ends: 951 [2022-03-19 23:01:42,160 INFO L226 Difference]: Without dead ends: 884 [2022-03-19 23:01:42,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15130 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2948, Invalid=34882, Unknown=0, NotChecked=0, Total=37830 [2022-03-19 23:01:42,167 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 314 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:42,167 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 119 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 23:01:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-03-19 23:01:42,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 365. [2022-03-19 23:01:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.4166666666666667) internal successors, (510), 360 states have internal predecessors, (510), 3 states have call successors, (3), 3 states 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 23:01:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 514 transitions. [2022-03-19 23:01:42,193 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 514 transitions. Word has length 33 [2022-03-19 23:01:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:42,193 INFO L478 AbstractCegarLoop]: Abstraction has 365 states and 514 transitions. [2022-03-19 23:01:42,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 514 transitions. [2022-03-19 23:01:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 23:01:42,194 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:42,194 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:42,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:42,412 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:42,412 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:42,413 INFO L85 PathProgramCache]: Analyzing trace with hash 289270042, now seen corresponding path program 3 times [2022-03-19 23:01:42,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:42,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689876350] [2022-03-19 23:01:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:42,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:42,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:01:42,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689876350] [2022-03-19 23:01:42,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689876350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071122709] [2022-03-19 23:01:42,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:01:42,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:42,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:42,559 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:42,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 23:01:42,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 23:01:42,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 23:01:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:01:42,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:01:42,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071122709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:42,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:42,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-03-19 23:01:42,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144098348] [2022-03-19 23:01:42,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:42,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 23:01:42,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 23:01:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:01:42,754 INFO L87 Difference]: Start difference. First operand 365 states and 514 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:42,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:42,953 INFO L93 Difference]: Finished difference Result 595 states and 828 transitions. [2022-03-19 23:01:42,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:01:42,954 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 23:01:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:42,955 INFO L225 Difference]: With dead ends: 595 [2022-03-19 23:01:42,955 INFO L226 Difference]: Without dead ends: 488 [2022-03-19 23:01:42,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-19 23:01:42,956 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 38 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:42,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 74 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:01:42,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-03-19 23:01:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 359. [2022-03-19 23:01:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.4293785310734464) internal successors, (506), 354 states have internal predecessors, (506), 3 states have call successors, (3), 3 states 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 23:01:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 510 transitions. [2022-03-19 23:01:42,975 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 510 transitions. Word has length 35 [2022-03-19 23:01:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:42,975 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 510 transitions. [2022-03-19 23:01:42,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 510 transitions. [2022-03-19 23:01:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 23:01:42,976 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:42,976 INFO L499 BasicCegarLoop]: trace histogram [7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:42,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:43,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:43,192 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:43,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1103922584, now seen corresponding path program 5 times [2022-03-19 23:01:43,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:43,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140059528] [2022-03-19 23:01:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:43,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:43,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:01:43,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:43,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140059528] [2022-03-19 23:01:43,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140059528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:43,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333011306] [2022-03-19 23:01:43,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:01:43,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:43,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:43,366 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:43,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 23:01:43,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:01:43,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 23:01:43,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:43,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:01:43,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333011306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:43,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:43,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 12] total 32 [2022-03-19 23:01:43,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126304271] [2022-03-19 23:01:43,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:43,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 23:01:43,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:43,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 23:01:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:01:43,853 INFO L87 Difference]: Start difference. First operand 359 states and 510 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:45,484 INFO L93 Difference]: Finished difference Result 740 states and 1113 transitions. [2022-03-19 23:01:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 23:01:45,485 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 23:01:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:45,487 INFO L225 Difference]: With dead ends: 740 [2022-03-19 23:01:45,487 INFO L226 Difference]: Without dead ends: 651 [2022-03-19 23:01:45,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1314, Invalid=5006, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 23:01:45,488 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 338 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:45,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 117 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 23:01:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-19 23:01:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 421. [2022-03-19 23:01:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 416 states have (on average 1.4302884615384615) internal successors, (595), 416 states have internal predecessors, (595), 3 states have call successors, (3), 3 states 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 23:01:45,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 599 transitions. [2022-03-19 23:01:45,510 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 599 transitions. Word has length 35 [2022-03-19 23:01:45,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:45,511 INFO L478 AbstractCegarLoop]: Abstraction has 421 states and 599 transitions. [2022-03-19 23:01:45,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:45,511 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 599 transitions. [2022-03-19 23:01:45,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 23:01:45,511 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:45,511 INFO L499 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:45,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-19 23:01:45,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:45,715 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:45,716 INFO L85 PathProgramCache]: Analyzing trace with hash -856081542, now seen corresponding path program 4 times [2022-03-19 23:01:45,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244854988] [2022-03-19 23:01:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:45,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:45,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 23:01:45,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:45,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244854988] [2022-03-19 23:01:45,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244854988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:45,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379580317] [2022-03-19 23:01:45,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:01:45,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:45,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:45,890 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:45,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 23:01:45,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:01:45,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:45,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 23:01:45,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 23:01:45,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 23:01:46,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379580317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:46,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:46,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-19 23:01:46,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505637349] [2022-03-19 23:01:46,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:46,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 23:01:46,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:46,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 23:01:46,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:01:46,233 INFO L87 Difference]: Start difference. First operand 421 states and 599 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 31 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:02:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:02:54,296 INFO L93 Difference]: Finished difference Result 1474 states and 2267 transitions. [2022-03-19 23:02:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-19 23:02:54,297 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 31 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 23:02:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:02:54,300 INFO L225 Difference]: With dead ends: 1474 [2022-03-19 23:02:54,300 INFO L226 Difference]: Without dead ends: 1351 [2022-03-19 23:02:54,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10410 ImplicationChecksByTransitivity, 65.5s TimeCoverageRelationStatistics Valid=6197, Invalid=20863, Unknown=0, NotChecked=0, Total=27060 [2022-03-19 23:02:54,302 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 1035 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 1200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1200 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:02:54,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 139 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1200 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-19 23:02:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-03-19 23:02:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 564. [2022-03-19 23:02:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 559 states have (on average 1.4257602862254024) internal successors, (797), 559 states have internal predecessors, (797), 3 states have call successors, (3), 3 states 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 23:02:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 801 transitions. [2022-03-19 23:02:54,340 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 801 transitions. Word has length 35 [2022-03-19 23:02:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:02:54,340 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 801 transitions. [2022-03-19 23:02:54,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 31 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:02:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 801 transitions. [2022-03-19 23:02:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 23:02:54,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:02:54,341 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:02:54,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 23:02:54,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:02:54,559 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:02:54,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:02:54,560 INFO L85 PathProgramCache]: Analyzing trace with hash -224601084, now seen corresponding path program 7 times [2022-03-19 23:02:54,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:02:54,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116317460] [2022-03-19 23:02:54,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:02:54,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:02:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:02:54,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:02:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:02:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:02:54,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:02:54,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116317460] [2022-03-19 23:02:54,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116317460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:02:54,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823890004] [2022-03-19 23:02:54,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:02:54,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:02:54,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:02:54,780 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:02:54,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 23:02:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:02:54,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 23:02:54,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:02:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:02:54,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:02:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:02:55,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823890004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:02:55,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:02:55,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 25 [2022-03-19 23:02:55,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462936565] [2022-03-19 23:02:55,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:02:55,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 23:02:55,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:02:55,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 23:02:55,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2022-03-19 23:02:55,025 INFO L87 Difference]: Start difference. First operand 564 states and 801 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:03:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:03:12,741 INFO L93 Difference]: Finished difference Result 1708 states and 2349 transitions. [2022-03-19 23:03:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2022-03-19 23:03:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-19 23:03:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:03:12,745 INFO L225 Difference]: With dead ends: 1708 [2022-03-19 23:03:12,745 INFO L226 Difference]: Without dead ends: 1598 [2022-03-19 23:03:12,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33007 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=5057, Invalid=73063, Unknown=0, NotChecked=0, Total=78120 [2022-03-19 23:03:12,749 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 449 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 1039 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 4189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1039 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:03:12,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 135 Invalid, 4189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1039 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-19 23:03:12,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2022-03-19 23:03:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 627. [2022-03-19 23:03:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 622 states have (on average 1.4308681672025723) internal successors, (890), 622 states have internal predecessors, (890), 3 states have call successors, (3), 3 states 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 23:03:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 894 transitions. [2022-03-19 23:03:12,797 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 894 transitions. Word has length 36 [2022-03-19 23:03:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:03:12,797 INFO L478 AbstractCegarLoop]: Abstraction has 627 states and 894 transitions. [2022-03-19 23:03:12,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:03:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 894 transitions. [2022-03-19 23:03:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 23:03:12,798 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:03:12,798 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:03:12,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 23:03:13,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:03:13,023 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:03:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:03:13,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1034985127, now seen corresponding path program 5 times [2022-03-19 23:03:13,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:03:13,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638057982] [2022-03-19 23:03:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:03:13,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:03:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:03:13,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:03:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:03:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-19 23:03:13,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:03:13,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638057982] [2022-03-19 23:03:13,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638057982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:03:13,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419911949] [2022-03-19 23:03:13,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:03:13,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:03:13,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:03:13,173 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:03:13,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 23:03:13,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-19 23:03:13,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:03:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 23:03:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:03:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 23:03:13,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:03:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 23:03:13,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419911949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:03:13,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:03:13,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 16 [2022-03-19 23:03:13,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959374772] [2022-03-19 23:03:13,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:03:13,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 23:03:13,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:03:13,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 23:03:13,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:03:13,450 INFO L87 Difference]: Start difference. First operand 627 states and 894 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:03:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:03:14,092 INFO L93 Difference]: Finished difference Result 1295 states and 1733 transitions. [2022-03-19 23:03:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 23:03:14,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 23:03:14,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:03:14,096 INFO L225 Difference]: With dead ends: 1295 [2022-03-19 23:03:14,096 INFO L226 Difference]: Without dead ends: 1226 [2022-03-19 23:03:14,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:03:14,097 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 162 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:03:14,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 71 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:03:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-03-19 23:03:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 660. [2022-03-19 23:03:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 655 states have (on average 1.4122137404580153) internal successors, (925), 655 states have internal predecessors, (925), 3 states have call successors, (3), 3 states 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 23:03:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 929 transitions. [2022-03-19 23:03:14,153 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 929 transitions. Word has length 37 [2022-03-19 23:03:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:03:14,153 INFO L478 AbstractCegarLoop]: Abstraction has 660 states and 929 transitions. [2022-03-19 23:03:14,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:03:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 929 transitions. [2022-03-19 23:03:14,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 23:03:14,154 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:03:14,154 INFO L499 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:03:14,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-19 23:03:14,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 23:03:14,358 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:03:14,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:03:14,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2096911303, now seen corresponding path program 6 times [2022-03-19 23:03:14,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:03:14,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694498483] [2022-03-19 23:03:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:03:14,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:03:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:03:14,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:03:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:03:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 23:03:14,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:03:14,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694498483] [2022-03-19 23:03:14,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694498483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:03:14,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401101409] [2022-03-19 23:03:14,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:03:14,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:03:14,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:03:14,560 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:03:14,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 23:03:14,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 23:03:14,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:03:14,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 23:03:14,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:03:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 23:03:14,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:03:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 23:03:14,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401101409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:03:14,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:03:14,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8, 9] total 31 [2022-03-19 23:03:14,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90090714] [2022-03-19 23:03:14,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:03:14,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 23:03:14,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:03:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 23:03:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:03:14,932 INFO L87 Difference]: Start difference. First operand 660 states and 929 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:03:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:03:20,586 INFO L93 Difference]: Finished difference Result 1167 states and 1688 transitions. [2022-03-19 23:03:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-19 23:03:20,586 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 23:03:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:03:20,588 INFO L225 Difference]: With dead ends: 1167 [2022-03-19 23:03:20,588 INFO L226 Difference]: Without dead ends: 1030 [2022-03-19 23:03:20,589 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6358 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1695, Invalid=19185, Unknown=0, NotChecked=0, Total=20880 [2022-03-19 23:03:20,589 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 239 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4854 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 5473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 4854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:03:20,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 173 Invalid, 5473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 4854 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 23:03:20,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-03-19 23:03:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 711. [2022-03-19 23:03:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 706 states have (on average 1.3909348441926346) internal successors, (982), 706 states have internal predecessors, (982), 3 states have call successors, (3), 3 states 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 23:03:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 986 transitions. [2022-03-19 23:03:20,632 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 986 transitions. Word has length 37 [2022-03-19 23:03:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:03:20,632 INFO L478 AbstractCegarLoop]: Abstraction has 711 states and 986 transitions. [2022-03-19 23:03:20,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:03:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 986 transitions. [2022-03-19 23:03:20,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 23:03:20,633 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:03:20,633 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:03:20,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 23:03:20,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 23:03:20,843 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:03:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:03:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1063665465, now seen corresponding path program 7 times [2022-03-19 23:03:20,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:03:20,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439447539] [2022-03-19 23:03:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:03:20,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:03:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:03:21,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:03:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:03:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:03:21,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:03:21,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439447539] [2022-03-19 23:03:21,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439447539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:03:21,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179697341] [2022-03-19 23:03:21,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:03:21,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:03:21,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:03:21,042 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:03:21,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 23:03:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:03:21,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:03:21,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:03:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:03:21,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:03:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:03:21,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179697341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:03:21,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:03:21,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 25 [2022-03-19 23:03:21,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891438594] [2022-03-19 23:03:21,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:03:21,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 23:03:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:03:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 23:03:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-03-19 23:03:21,294 INFO L87 Difference]: Start difference. First operand 711 states and 986 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:03:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:03:35,129 INFO L93 Difference]: Finished difference Result 1815 states and 2363 transitions. [2022-03-19 23:03:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-03-19 23:03:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-19 23:03:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:03:35,132 INFO L225 Difference]: With dead ends: 1815 [2022-03-19 23:03:35,133 INFO L226 Difference]: Without dead ends: 1712 [2022-03-19 23:03:35,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28898 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=4665, Invalid=64767, Unknown=0, NotChecked=0, Total=69432 [2022-03-19 23:03:35,137 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 440 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3214 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 3972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 3214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:03:35,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 164 Invalid, 3972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 3214 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-19 23:03:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-03-19 23:03:35,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 661. [2022-03-19 23:03:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 656 states have (on average 1.4054878048780488) internal successors, (922), 656 states have internal predecessors, (922), 3 states have call successors, (3), 3 states 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 23:03:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 926 transitions. [2022-03-19 23:03:35,203 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 926 transitions. Word has length 39 [2022-03-19 23:03:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:03:35,204 INFO L478 AbstractCegarLoop]: Abstraction has 661 states and 926 transitions. [2022-03-19 23:03:35,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:03:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 926 transitions. [2022-03-19 23:03:35,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 23:03:35,204 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:03:35,205 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:03:35,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 23:03:35,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 23:03:35,429 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:03:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:03:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash -439094120, now seen corresponding path program 8 times [2022-03-19 23:03:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:03:35,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721500067] [2022-03-19 23:03:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:03:35,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:03:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:03:35,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:03:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:03:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:03:35,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:03:35,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721500067] [2022-03-19 23:03:35,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721500067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:03:35,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394029202] [2022-03-19 23:03:35,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:03:35,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:03:35,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:03:35,639 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:03:35,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 23:03:35,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:03:35,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:03:35,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:03:35,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:03:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 23:03:35,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:03:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 23:03:35,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394029202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:03:35,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:03:35,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2022-03-19 23:03:35,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86840093] [2022-03-19 23:03:35,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:03:35,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 23:03:35,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:03:35,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 23:03:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2022-03-19 23:03:35,941 INFO L87 Difference]: Start difference. First operand 661 states and 926 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:04:16,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:04:16,898 INFO L93 Difference]: Finished difference Result 2176 states and 2907 transitions. [2022-03-19 23:04:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 364 states. [2022-03-19 23:04:16,899 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-19 23:04:16,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:04:16,903 INFO L225 Difference]: With dead ends: 2176 [2022-03-19 23:04:16,903 INFO L226 Difference]: Without dead ends: 2073 [2022-03-19 23:04:16,917 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66276 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=8545, Invalid=142387, Unknown=0, NotChecked=0, Total=150932 [2022-03-19 23:04:16,920 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 538 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4843 mSolverCounterSat, 1329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 6172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1329 IncrementalHoareTripleChecker+Valid, 4843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:04:16,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 155 Invalid, 6172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1329 Valid, 4843 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-03-19 23:04:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2022-03-19 23:04:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 768. [2022-03-19 23:04:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 763 states have (on average 1.3918741808650066) internal successors, (1062), 763 states have internal predecessors, (1062), 3 states have call successors, (3), 3 states 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 23:04:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1066 transitions. [2022-03-19 23:04:16,972 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1066 transitions. Word has length 39 [2022-03-19 23:04:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:04:16,972 INFO L478 AbstractCegarLoop]: Abstraction has 768 states and 1066 transitions. [2022-03-19 23:04:16,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:04:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1066 transitions. [2022-03-19 23:04:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 23:04:16,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:04:16,973 INFO L499 BasicCegarLoop]: trace histogram [13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:04:16,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 23:04:17,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:04:17,188 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:04:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:04:17,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1547664359, now seen corresponding path program 6 times [2022-03-19 23:04:17,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:04:17,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222521047] [2022-03-19 23:04:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:04:17,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:04:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:04:17,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:04:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:04:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 23:04:17,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:04:17,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222521047] [2022-03-19 23:04:17,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222521047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:04:17,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746094012] [2022-03-19 23:04:17,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:04:17,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:04:17,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:04:17,393 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:04:17,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 23:04:17,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 23:04:17,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:04:17,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 23:04:17,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:04:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-19 23:04:17,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:04:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-03-19 23:04:17,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746094012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:04:17,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:04:17,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 8] total 33 [2022-03-19 23:04:17,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807143472] [2022-03-19 23:04:17,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:04:17,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 23:04:17,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:04:17,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 23:04:17,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 23:04:17,741 INFO L87 Difference]: Start difference. First operand 768 states and 1066 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:04:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:04:22,205 INFO L93 Difference]: Finished difference Result 1311 states and 1889 transitions. [2022-03-19 23:04:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-19 23:04:22,205 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-19 23:04:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:04:22,207 INFO L225 Difference]: With dead ends: 1311 [2022-03-19 23:04:22,207 INFO L226 Difference]: Without dead ends: 1088 [2022-03-19 23:04:22,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9431 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2421, Invalid=26309, Unknown=0, NotChecked=0, Total=28730 [2022-03-19 23:04:22,209 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 218 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4227 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 4902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 4227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:04:22,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 150 Invalid, 4902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 4227 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:04:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-03-19 23:04:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 766. [2022-03-19 23:04:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 761 states have (on average 1.3942181340341655) internal successors, (1061), 761 states have internal predecessors, (1061), 3 states have call successors, (3), 3 states 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 23:04:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1065 transitions. [2022-03-19 23:04:22,263 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1065 transitions. Word has length 39 [2022-03-19 23:04:22,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:04:22,263 INFO L478 AbstractCegarLoop]: Abstraction has 766 states and 1065 transitions. [2022-03-19 23:04:22,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:04:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1065 transitions. [2022-03-19 23:04:22,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 23:04:22,264 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:04:22,264 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:04:22,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 23:04:22,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 23:04:22,480 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:04:22,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:04:22,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1046867033, now seen corresponding path program 7 times [2022-03-19 23:04:22,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:04:22,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351762345] [2022-03-19 23:04:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:04:22,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:04:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:04:22,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:04:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:04:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:04:22,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:04:22,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351762345] [2022-03-19 23:04:22,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351762345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:04:22,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42719457] [2022-03-19 23:04:22,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:04:22,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:04:22,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:04:22,607 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:04:22,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 23:04:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:04:22,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 23:04:22,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:04:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 23:04:22,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:04:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 23:04:22,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42719457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:04:22,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:04:22,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-03-19 23:04:22,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533118995] [2022-03-19 23:04:22,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:04:22,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 23:04:22,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:04:22,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 23:04:22,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:04:22,790 INFO L87 Difference]: Start difference. First operand 766 states and 1065 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:04:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:04:23,097 INFO L93 Difference]: Finished difference Result 1256 states and 1687 transitions. [2022-03-19 23:04:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 23:04:23,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-19 23:04:23,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:04:23,099 INFO L225 Difference]: With dead ends: 1256 [2022-03-19 23:04:23,099 INFO L226 Difference]: Without dead ends: 1052 [2022-03-19 23:04:23,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-19 23:04:23,100 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:04:23,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 80 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:04:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-03-19 23:04:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 746. [2022-03-19 23:04:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 741 states have (on average 1.388663967611336) internal successors, (1029), 741 states have internal predecessors, (1029), 3 states have call successors, (3), 3 states 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 23:04:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1033 transitions. [2022-03-19 23:04:23,163 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1033 transitions. Word has length 41 [2022-03-19 23:04:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:04:23,163 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 1033 transitions. [2022-03-19 23:04:23,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:04:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1033 transitions. [2022-03-19 23:04:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 23:04:23,164 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:04:23,164 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:04:23,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 23:04:23,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:04:23,367 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:04:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:04:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1628968459, now seen corresponding path program 8 times [2022-03-19 23:04:23,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:04:23,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920452062] [2022-03-19 23:04:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:04:23,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:04:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:04:23,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:04:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:04:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 23:04:23,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:04:23,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920452062] [2022-03-19 23:04:23,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920452062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:04:23,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799096801] [2022-03-19 23:04:23,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:04:23,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:04:23,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:04:23,583 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:04:23,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 23:04:23,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:04:23,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:04:23,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:04:23,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:04:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 23:04:23,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:04:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 23:04:23,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799096801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:04:23,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:04:23,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2022-03-19 23:04:23,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492348643] [2022-03-19 23:04:23,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:04:23,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 23:04:23,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:04:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 23:04:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2022-03-19 23:04:23,881 INFO L87 Difference]: Start difference. First operand 746 states and 1033 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:04:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:04:50,821 INFO L93 Difference]: Finished difference Result 2257 states and 2893 transitions. [2022-03-19 23:04:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 332 states. [2022-03-19 23:04:50,821 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-19 23:04:50,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:04:50,825 INFO L225 Difference]: With dead ends: 2257 [2022-03-19 23:04:50,825 INFO L226 Difference]: Without dead ends: 2122 [2022-03-19 23:04:50,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54736 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=7646, Invalid=119446, Unknown=0, NotChecked=0, Total=127092 [2022-03-19 23:04:50,832 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 504 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3210 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 4059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 3210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:04:50,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 157 Invalid, 4059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 3210 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-19 23:04:50,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2022-03-19 23:04:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 743. [2022-03-19 23:04:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 738 states have (on average 1.3848238482384825) internal successors, (1022), 738 states have internal predecessors, (1022), 3 states have call successors, (3), 3 states 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 23:04:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1026 transitions. [2022-03-19 23:04:50,907 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1026 transitions. Word has length 42 [2022-03-19 23:04:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:04:50,907 INFO L478 AbstractCegarLoop]: Abstraction has 743 states and 1026 transitions. [2022-03-19 23:04:50,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:04:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1026 transitions. [2022-03-19 23:04:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 23:04:50,908 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:04:50,908 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:04:50,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 23:04:51,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 23:04:51,124 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:04:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:04:51,125 INFO L85 PathProgramCache]: Analyzing trace with hash -209000572, now seen corresponding path program 9 times [2022-03-19 23:04:51,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:04:51,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740282767] [2022-03-19 23:04:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:04:51,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:04:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:04:51,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:04:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:04:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:04:51,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:04:51,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740282767] [2022-03-19 23:04:51,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740282767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:04:51,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434759724] [2022-03-19 23:04:51,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:04:51,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:04:51,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:04:51,391 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:04:51,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 23:04:51,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 23:04:51,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:04:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 23:04:51,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:04:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 23:04:51,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:04:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 23:04:51,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434759724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:04:51,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:04:51,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 31 [2022-03-19 23:04:51,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305430032] [2022-03-19 23:04:51,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:04:51,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 23:04:51,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:04:51,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 23:04:51,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:04:51,851 INFO L87 Difference]: Start difference. First operand 743 states and 1026 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:06:25,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:25,569 INFO L93 Difference]: Finished difference Result 2614 states and 3453 transitions. [2022-03-19 23:06:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 491 states. [2022-03-19 23:06:25,570 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-19 23:06:25,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:25,575 INFO L225 Difference]: With dead ends: 2614 [2022-03-19 23:06:25,575 INFO L226 Difference]: Without dead ends: 2495 [2022-03-19 23:06:25,583 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120966 ImplicationChecksByTransitivity, 82.4s TimeCoverageRelationStatistics Valid=13139, Invalid=255703, Unknown=0, NotChecked=0, Total=268842 [2022-03-19 23:06:25,584 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 621 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 6961 mSolverCounterSat, 1515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1515 IncrementalHoareTripleChecker+Valid, 6961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:25,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 181 Invalid, 8476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1515 Valid, 6961 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-03-19 23:06:25,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2022-03-19 23:06:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 847. [2022-03-19 23:06:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 842 states have (on average 1.3764845605700713) internal successors, (1159), 842 states have internal predecessors, (1159), 3 states have call successors, (3), 3 states 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 23:06:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1163 transitions. [2022-03-19 23:06:25,683 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1163 transitions. Word has length 42 [2022-03-19 23:06:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:25,684 INFO L478 AbstractCegarLoop]: Abstraction has 847 states and 1163 transitions. [2022-03-19 23:06:25,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:06:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1163 transitions. [2022-03-19 23:06:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 23:06:25,685 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:25,685 INFO L499 BasicCegarLoop]: trace histogram [14, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:25,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 23:06:25,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:25,885 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:25,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1181670180, now seen corresponding path program 8 times [2022-03-19 23:06:25,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:25,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499556015] [2022-03-19 23:06:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:25,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:26,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 23:06:26,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:26,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499556015] [2022-03-19 23:06:26,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499556015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:26,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850232684] [2022-03-19 23:06:26,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:06:26,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:26,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:26,120 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:06:26,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 23:06:26,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:06:26,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:26,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 23:06:26,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:06:26,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:06:26,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850232684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:26,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:26,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 42 [2022-03-19 23:06:26,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268457148] [2022-03-19 23:06:26,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:26,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 23:06:26,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:26,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 23:06:26,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 23:06:26,812 INFO L87 Difference]: Start difference. First operand 847 states and 1163 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:06:46,483 WARN L232 SmtUtils]: Spent 5.86s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:06:56,481 WARN L833 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 2 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~z~0) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 0 (mod (+ 4294967294 c_main_~z~0) 4294967296)) (< 0 (mod (+ 11 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~y~0 4294967296)) (< 0 (mod (+ 4294967294 c_main_~y~0) 4294967296)) (< 0 (mod (+ 3 c_main_~y~0) 4294967296)) (< 0 (mod (+ c_main_~y~0 4294967293) 4294967296)) (< 0 (mod (+ c_main_~y~0 1) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~y~0) 4294967296)) (< 0 (mod (+ 8 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~z~0 4294967296)) (< 0 (mod (+ 4294967293 c_main_~z~0) 4294967296)) (< 0 (mod (+ 6 c_main_~y~0) 4294967296)) (< 0 (mod (+ 5 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4 c_main_~y~0) 4294967296)) (< 0 (mod (+ 9 c_main_~y~0) 4294967296)) (< 0 (mod (+ 10 c_main_~y~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 0 (mod (+ 7 c_main_~y~0) 4294967296))) is different from false [2022-03-19 23:07:06,879 WARN L232 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:07:31,927 WARN L232 SmtUtils]: Spent 14.72s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:07:56,147 WARN L232 SmtUtils]: Spent 9.20s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:08:08,033 WARN L232 SmtUtils]: Spent 6.33s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:08:23,072 WARN L232 SmtUtils]: Spent 7.25s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:08:37,917 WARN L232 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:08:50,176 WARN L232 SmtUtils]: Spent 6.56s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:09:13,143 WARN L232 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:09:20,877 WARN L232 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:09:29,975 WARN L232 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:10:13,446 WARN L232 SmtUtils]: Spent 8.69s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:10:50,909 WARN L232 SmtUtils]: Spent 7.12s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:14:32,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:15:12,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:15:29,275 WARN L232 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:15:31,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:15:47,465 WARN L232 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)