/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-de32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 22:57:24,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 22:57:24,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 22:57:24,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 22:57:25,032 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 22:57:25,054 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 22:57:25,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 22:57:25,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 22:57:25,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 22:57:25,056 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 22:57:25,056 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 22:57:25,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 22:57:25,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 22:57:25,056 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 22:57:25,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 22:57:25,057 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 22:57:25,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 22:57:25,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 22:57:25,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 22:57:25,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 22:57:25,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 22:57:25,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 22:57:25,058 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 22:57:25,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 22:57:25,058 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 22:57:25,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 22:57:25,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 22:57:25,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 22:57:25,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 22:57:25,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:57:25,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 22:57:25,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 22:57:25,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 22:57:25,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 22:57:25,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 22:57:25,059 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 22:57:25,059 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 22:57:25,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 22:57:25,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 22:57:25,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 22:57:25,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 22:57:25,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 22:57:25,260 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 22:57:25,261 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 22:57:25,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de32.c [2022-03-19 22:57:25,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8acb4c2a0/78bf821379e645c29f42be9abf3eaf76/FLAGfc64fe6f6 [2022-03-19 22:57:25,616 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 22:57:25,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de32.c [2022-03-19 22:57:25,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8acb4c2a0/78bf821379e645c29f42be9abf3eaf76/FLAGfc64fe6f6 [2022-03-19 22:57:25,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8acb4c2a0/78bf821379e645c29f42be9abf3eaf76 [2022-03-19 22:57:25,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 22:57:25,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 22:57:25,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 22:57:25,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 22:57:25,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 22:57:25,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:57:25" (1/1) ... [2022-03-19 22:57:25,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88b057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:57:25, skipping insertion in model container [2022-03-19 22:57:25,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:57:25" (1/1) ... [2022-03-19 22:57:25,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 22:57:25,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 22:57:25,792 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-de32.c[368,381] [2022-03-19 22:57:25,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:57:25,809 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 22:57:25,817 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-de32.c[368,381] [2022-03-19 22:57:25,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:57:25,829 INFO L208 MainTranslator]: Completed translation [2022-03-19 22:57:25,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:57:25 WrapperNode [2022-03-19 22:57:25,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 22:57:25,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 22:57:25,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 22:57:25,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 22:57:25,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:57:25" (1/1) ... [2022-03-19 22:57:25,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:57:25" (1/1) ... [2022-03-19 22:57:25,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:57:25" (1/1) ... [2022-03-19 22:57:25,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:57:25" (1/1) ... [2022-03-19 22:57:25,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:57:25" (1/1) ... [2022-03-19 22:57:25,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:57:25" (1/1) ... [2022-03-19 22:57:25,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:57:25" (1/1) ... [2022-03-19 22:57:25,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 22:57:25,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 22:57:25,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 22:57:25,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 22:57:25,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:57:25" (1/1) ... [2022-03-19 22:57:25,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:57:25,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:25,880 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 22:57:25,912 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 22:57:25,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 22:57:25,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 22:57:25,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 22:57:25,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 22:57:25,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 22:57:25,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 22:57:25,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 22:57:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 22:57:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 22:57:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 22:57:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 22:57:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 22:57:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 22:57:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 22:57:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 22:57:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 22:57:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 22:57:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 22:57:25,980 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 22:57:25,981 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 22:57:26,072 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 22:57:26,075 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 22:57:26,075 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 22:57:26,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:57:26 BoogieIcfgContainer [2022-03-19 22:57:26,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 22:57:26,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 22:57:26,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 22:57:26,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 22:57:26,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:57:25" (1/3) ... [2022-03-19 22:57:26,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c484725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:57:26, skipping insertion in model container [2022-03-19 22:57:26,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:57:25" (2/3) ... [2022-03-19 22:57:26,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c484725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:57:26, skipping insertion in model container [2022-03-19 22:57:26,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:57:26" (3/3) ... [2022-03-19 22:57:26,099 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de32.c [2022-03-19 22:57:26,102 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 22:57:26,102 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 22:57:26,142 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 22:57:26,147 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 22:57:26,147 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 22:57:26,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:57:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 22:57:26,159 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:26,159 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:26,160 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:26,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:26,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1792812365, now seen corresponding path program 1 times [2022-03-19 22:57:26,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:26,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007993802] [2022-03-19 22:57:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:26,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:26,403 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 22:57:26,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:26,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007993802] [2022-03-19 22:57:26,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007993802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:57:26,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:57:26,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 22:57:26,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392696898] [2022-03-19 22:57:26,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:57:26,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 22:57:26,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:26,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 22:57:26,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 22:57:26,428 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:26,577 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-03-19 22:57:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 22:57:26,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 22:57:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:26,583 INFO L225 Difference]: With dead ends: 47 [2022-03-19 22:57:26,583 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 22:57:26,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 22:57:26,588 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:26,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:57:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 22:57:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-19 22:57:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-03-19 22:57:26,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2022-03-19 22:57:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:26,610 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-03-19 22:57:26,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:26,611 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-03-19 22:57:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 22:57:26,611 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:26,611 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:26,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 22:57:26,612 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:26,612 INFO L85 PathProgramCache]: Analyzing trace with hash -222896448, now seen corresponding path program 1 times [2022-03-19 22:57:26,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:26,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698448095] [2022-03-19 22:57:26,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:26,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:26,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:26,648 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 22:57:26,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:26,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698448095] [2022-03-19 22:57:26,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698448095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:57:26,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:57:26,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 22:57:26,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430336975] [2022-03-19 22:57:26,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:57:26,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:57:26,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:26,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:57:26,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 22:57:26,650 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states 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 22:57:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:26,674 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2022-03-19 22:57:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:57:26,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2022-03-19 22:57:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:26,676 INFO L225 Difference]: With dead ends: 30 [2022-03-19 22:57:26,676 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 22:57:26,676 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 22:57:26,677 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:26,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:57:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 22:57:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-03-19 22:57:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-03-19 22:57:26,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2022-03-19 22:57:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:26,682 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-03-19 22:57:26,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states 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 22:57:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-03-19 22:57:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 22:57:26,683 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:26,683 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:26,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 22:57:26,683 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1179931951, now seen corresponding path program 1 times [2022-03-19 22:57:26,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:26,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795946889] [2022-03-19 22:57:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:26,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:26,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:26,718 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 22:57:26,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:26,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795946889] [2022-03-19 22:57:26,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795946889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:57:26,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:57:26,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 22:57:26,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756126768] [2022-03-19 22:57:26,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:57:26,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 22:57:26,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:26,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 22:57:26,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:57:26,720 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states 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 22:57:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:26,751 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-03-19 22:57:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 22:57:26,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2022-03-19 22:57:26,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:26,752 INFO L225 Difference]: With dead ends: 27 [2022-03-19 22:57:26,752 INFO L226 Difference]: Without dead ends: 18 [2022-03-19 22:57:26,752 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 22:57:26,753 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:26,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:57:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-19 22:57:26,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-19 22:57:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-03-19 22:57:26,756 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2022-03-19 22:57:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:26,757 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-03-19 22:57:26,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states 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 22:57:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-03-19 22:57:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-19 22:57:26,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:26,757 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:26,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 22:57:26,758 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:26,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1314021247, now seen corresponding path program 1 times [2022-03-19 22:57:26,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:26,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046152853] [2022-03-19 22:57:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:26,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:26,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:57:26,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:26,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046152853] [2022-03-19 22:57:26,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046152853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:26,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879273753] [2022-03-19 22:57:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:26,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:26,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:26,839 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 22:57:26,840 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 22:57:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:26,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 22:57:26,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:57:26,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:57:26,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879273753] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:26,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-19 22:57:26,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-03-19 22:57:26,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353317753] [2022-03-19 22:57:26,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:57:26,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:57:26,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:26,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:57:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 22:57:26,989 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 22:57:27,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:27,000 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-03-19 22:57:27,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:57:27,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2022-03-19 22:57:27,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:27,001 INFO L225 Difference]: With dead ends: 24 [2022-03-19 22:57:27,001 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 22:57:27,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 22:57:27,002 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:27,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:57:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 22:57:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-19 22:57:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-19 22:57:27,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2022-03-19 22:57:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:27,006 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-19 22:57:27,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 22:57:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-19 22:57:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-19 22:57:27,006 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:27,006 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:27,023 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 22:57:27,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:27,220 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:27,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1578117650, now seen corresponding path program 1 times [2022-03-19 22:57:27,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:27,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698215042] [2022-03-19 22:57:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:27,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:27,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:57:27,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:27,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698215042] [2022-03-19 22:57:27,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698215042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:27,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405711655] [2022-03-19 22:57:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:27,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:27,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:27,313 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 22:57:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:27,373 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 22:57:27,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 22:57:27,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:57:27,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:57:27,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405711655] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:27,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-19 22:57:27,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 9 [2022-03-19 22:57:27,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380020070] [2022-03-19 22:57:27,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:57:27,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:57:27,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:57:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-19 22:57:27,499 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 22:57:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:27,517 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-03-19 22:57:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:57:27,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2022-03-19 22:57:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:27,519 INFO L225 Difference]: With dead ends: 23 [2022-03-19 22:57:27,519 INFO L226 Difference]: Without dead ends: 18 [2022-03-19 22:57:27,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-19 22:57:27,521 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:27,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:57:27,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-19 22:57:27,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-19 22:57:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-19 22:57:27,528 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2022-03-19 22:57:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:27,528 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-19 22:57:27,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 22:57:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-19 22:57:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 22:57:27,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:27,529 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 22:57:27,576 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 22:57:27,745 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:27,746 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1642511809, now seen corresponding path program 1 times [2022-03-19 22:57:27,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:27,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931005958] [2022-03-19 22:57:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:27,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:27,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:57:27,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:27,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931005958] [2022-03-19 22:57:27,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931005958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:27,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068288228] [2022-03-19 22:57:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:27,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:27,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:27,814 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 22:57:27,851 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 22:57:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:27,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 22:57:27,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:57:28,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:57:28,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068288228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:28,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:28,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-03-19 22:57:28,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111152376] [2022-03-19 22:57:28,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:28,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 22:57:28,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:28,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 22:57:28,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 22:57:28,072 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 6 states have internal predecessors, (16), 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 22:57:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:28,158 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-03-19 22:57:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 22:57:28,159 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 6 states have internal predecessors, (16), 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 17 [2022-03-19 22:57:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:28,159 INFO L225 Difference]: With dead ends: 26 [2022-03-19 22:57:28,159 INFO L226 Difference]: Without dead ends: 21 [2022-03-19 22:57:28,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 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 22:57:28,162 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:28,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 46 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:57:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-19 22:57:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-19 22:57:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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 22:57:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-19 22:57:28,169 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2022-03-19 22:57:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:28,170 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-19 22:57:28,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 6 states have internal predecessors, (16), 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 22:57:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-19 22:57:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 22:57:28,171 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:28,171 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:28,200 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 22:57:28,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:28,386 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:28,386 INFO L85 PathProgramCache]: Analyzing trace with hash 656236558, now seen corresponding path program 2 times [2022-03-19 22:57:28,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:28,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670780118] [2022-03-19 22:57:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:28,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:28,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:57:28,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:28,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670780118] [2022-03-19 22:57:28,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670780118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:28,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392684337] [2022-03-19 22:57:28,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:57:28,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:28,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:28,429 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 22:57:28,430 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 22:57:28,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:57:28,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:28,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 22:57:28,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:57:28,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:57:28,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392684337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:28,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:28,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-03-19 22:57:28,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913276328] [2022-03-19 22:57:28,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:28,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 22:57:28,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 22:57:28,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-19 22:57:28,596 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (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 22:57:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:28,746 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-03-19 22:57:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 22:57:28,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (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 18 [2022-03-19 22:57:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:28,747 INFO L225 Difference]: With dead ends: 35 [2022-03-19 22:57:28,747 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 22:57:28,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-03-19 22:57:28,748 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:28,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:57:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 22:57:28,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-19 22:57:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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 22:57:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-19 22:57:28,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2022-03-19 22:57:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:28,751 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-19 22:57:28,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (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 22:57:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-19 22:57:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 22:57:28,752 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:28,752 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:28,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 22:57:28,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:28,959 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:28,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1137046944, now seen corresponding path program 3 times [2022-03-19 22:57:28,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:28,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104129088] [2022-03-19 22:57:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:29,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:57:29,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104129088] [2022-03-19 22:57:29,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104129088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152585645] [2022-03-19 22:57:29,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:57:29,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:29,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:29,028 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 22:57:29,051 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 22:57:29,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-19 22:57:29,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:29,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 22:57:29,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:57:29,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:57:29,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152585645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:29,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:29,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-19 22:57:29,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880749972] [2022-03-19 22:57:29,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:29,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 22:57:29,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:29,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 22:57:29,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-19 22:57:29,226 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 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 22:57:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:29,440 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-19 22:57:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 22:57:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 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 19 [2022-03-19 22:57:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:29,441 INFO L225 Difference]: With dead ends: 47 [2022-03-19 22:57:29,441 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 22:57:29,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2022-03-19 22:57:29,442 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:29,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 29 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:57:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 22:57:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2022-03-19 22:57:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-03-19 22:57:29,447 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2022-03-19 22:57:29,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:29,448 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-03-19 22:57:29,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 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 22:57:29,448 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-03-19 22:57:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 22:57:29,448 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:29,448 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:29,471 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 22:57:29,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:29,668 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:29,669 INFO L85 PathProgramCache]: Analyzing trace with hash -854221811, now seen corresponding path program 4 times [2022-03-19 22:57:29,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:29,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128798960] [2022-03-19 22:57:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:29,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:29,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:57:29,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128798960] [2022-03-19 22:57:29,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128798960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203414167] [2022-03-19 22:57:29,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:57:29,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:29,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:29,761 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 22:57:29,762 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 22:57:29,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:57:29,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:29,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 22:57:29,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:57:29,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:57:29,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203414167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:29,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:29,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-03-19 22:57:29,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858145345] [2022-03-19 22:57:29,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:29,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 22:57:29,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:29,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 22:57:29,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-19 22:57:29,894 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 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 22:57:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:29,976 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-03-19 22:57:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 22:57:29,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 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 20 [2022-03-19 22:57:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:29,977 INFO L225 Difference]: With dead ends: 42 [2022-03-19 22:57:29,977 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 22:57:29,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-19 22:57:29,977 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:29,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 46 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:57:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 22:57:29,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-19 22:57:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-03-19 22:57:29,983 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 20 [2022-03-19 22:57:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:29,983 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-03-19 22:57:29,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 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 22:57:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-03-19 22:57:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 22:57:29,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:29,984 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:30,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-19 22:57:30,205 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:30,205 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:30,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1178216785, now seen corresponding path program 5 times [2022-03-19 22:57:30,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:30,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524870225] [2022-03-19 22:57:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:30,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:30,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:57:30,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:30,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524870225] [2022-03-19 22:57:30,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524870225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:30,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969501434] [2022-03-19 22:57:30,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:57:30,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:30,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:30,332 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 22:57:30,333 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 22:57:30,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-19 22:57:30,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:30,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 22:57:30,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:57:30,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:57:30,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969501434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:30,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:30,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 22:57:30,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948071947] [2022-03-19 22:57:30,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:30,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 22:57:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 22:57:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-03-19 22:57:30,542 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 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 22:57:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:30,843 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-03-19 22:57:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 22:57:30,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 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 22:57:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:30,845 INFO L225 Difference]: With dead ends: 66 [2022-03-19 22:57:30,845 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 22:57:30,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 22:57:30,846 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:30,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 57 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:57:30,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 22:57:30,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 23. [2022-03-19 22:57:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-19 22:57:30,850 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2022-03-19 22:57:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:30,850 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-19 22:57:30,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 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 22:57:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-19 22:57:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 22:57:30,851 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:30,851 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:30,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 22:57:31,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:31,060 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1752036735, now seen corresponding path program 6 times [2022-03-19 22:57:31,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:31,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827897962] [2022-03-19 22:57:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:31,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:31,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 22:57:31,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:31,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827897962] [2022-03-19 22:57:31,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827897962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:31,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910007710] [2022-03-19 22:57:31,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:57:31,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:31,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:31,137 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 22:57:31,138 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 22:57:31,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 22:57:31,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:31,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 22:57:31,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 22:57:31,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 22:57:31,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910007710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:31,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:31,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 19 [2022-03-19 22:57:31,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822786371] [2022-03-19 22:57:31,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:31,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 22:57:31,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:31,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 22:57:31,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-19 22:57:31,354 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 22:57:31,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:31,691 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-03-19 22:57:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 22:57:31,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 22 [2022-03-19 22:57:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:31,692 INFO L225 Difference]: With dead ends: 50 [2022-03-19 22:57:31,692 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 22:57:31,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 22:57:31,693 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:31,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 48 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:57:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 22:57:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-19 22:57:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 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 22:57:31,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-03-19 22:57:31,700 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2022-03-19 22:57:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:31,700 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-03-19 22:57:31,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 22:57:31,701 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-03-19 22:57:31,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 22:57:31,701 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:31,701 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:31,721 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 22:57:31,922 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,SelfDestructingSolverStorable10 [2022-03-19 22:57:31,922 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:31,922 INFO L85 PathProgramCache]: Analyzing trace with hash 142103551, now seen corresponding path program 7 times [2022-03-19 22:57:31,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:31,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982922993] [2022-03-19 22:57:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:31,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:32,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 22:57:32,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:32,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982922993] [2022-03-19 22:57:32,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982922993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:32,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675708273] [2022-03-19 22:57:32,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:57:32,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:32,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:32,023 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 22:57:32,036 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 22:57:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:32,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 22:57:32,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 22:57:32,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 22:57:32,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675708273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:32,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:32,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-03-19 22:57:32,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198295252] [2022-03-19 22:57:32,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:32,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 22:57:32,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:32,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 22:57:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-19 22:57:32,184 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 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 22:57:32,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:32,313 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-03-19 22:57:32,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 22:57:32,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 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 22:57:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:32,314 INFO L225 Difference]: With dead ends: 51 [2022-03-19 22:57:32,314 INFO L226 Difference]: Without dead ends: 42 [2022-03-19 22:57:32,314 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 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 22:57:32,314 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:32,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:57:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-19 22:57:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-03-19 22:57:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-03-19 22:57:32,322 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 23 [2022-03-19 22:57:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:32,322 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-03-19 22:57:32,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 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 22:57:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-03-19 22:57:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 22:57:32,322 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:32,322 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:32,339 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 22:57:32,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:32,551 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:32,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:32,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2034209681, now seen corresponding path program 8 times [2022-03-19 22:57:32,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:32,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662243413] [2022-03-19 22:57:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:32,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:32,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 22:57:32,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:32,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662243413] [2022-03-19 22:57:32,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662243413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:32,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747126543] [2022-03-19 22:57:32,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:57:32,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:32,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:32,702 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 22:57:32,705 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 22:57:32,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:57:32,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:32,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 22:57:32,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 22:57:32,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 22:57:32,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747126543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:32,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:32,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-03-19 22:57:32,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936097243] [2022-03-19 22:57:32,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:32,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 22:57:32,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:32,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 22:57:32,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-19 22:57:32,963 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 22:57:33,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:33,634 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2022-03-19 22:57:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 22:57:33,635 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 25 [2022-03-19 22:57:33,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:33,635 INFO L225 Difference]: With dead ends: 69 [2022-03-19 22:57:33,635 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 22:57:33,636 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 22:57:33,637 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:33,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 70 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:57:33,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 22:57:33,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2022-03-19 22:57:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-03-19 22:57:33,646 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 25 [2022-03-19 22:57:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:33,646 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-03-19 22:57:33,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 22:57:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-03-19 22:57:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 22:57:33,647 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:33,647 INFO L499 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:33,665 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 22:57:33,865 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,SelfDestructingSolverStorable12 [2022-03-19 22:57:33,865 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:33,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:33,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1196529023, now seen corresponding path program 9 times [2022-03-19 22:57:33,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:33,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440967755] [2022-03-19 22:57:33,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:33,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:33,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:57:33,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:33,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440967755] [2022-03-19 22:57:33,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440967755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:33,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860371117] [2022-03-19 22:57:33,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:57:33,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:33,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:33,982 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 22:57:33,983 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 22:57:34,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 22:57:34,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:34,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 22:57:34,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:57:34,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:57:34,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860371117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:34,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:34,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-19 22:57:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912084094] [2022-03-19 22:57:34,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:34,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 22:57:34,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:34,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 22:57:34,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-19 22:57:34,290 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 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 22:57:34,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:34,701 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-03-19 22:57:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 22:57:34,701 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 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 26 [2022-03-19 22:57:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:34,702 INFO L225 Difference]: With dead ends: 85 [2022-03-19 22:57:34,702 INFO L226 Difference]: Without dead ends: 68 [2022-03-19 22:57:34,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=366, Invalid=1614, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 22:57:34,703 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 113 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:34,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 72 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:57:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-19 22:57:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2022-03-19 22:57:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-03-19 22:57:34,710 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 26 [2022-03-19 22:57:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:34,710 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-03-19 22:57:34,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 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 22:57:34,711 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-03-19 22:57:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 22:57:34,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:34,715 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:34,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 22:57:34,927 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,SelfDestructingSolverStorable13 [2022-03-19 22:57:34,927 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash 359277261, now seen corresponding path program 10 times [2022-03-19 22:57:34,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:34,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267827817] [2022-03-19 22:57:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:34,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:35,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 22:57:35,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267827817] [2022-03-19 22:57:35,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267827817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498268248] [2022-03-19 22:57:35,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:57:35,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:35,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:35,033 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 22:57:35,035 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 22:57:35,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:57:35,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 22:57:35,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 22:57:35,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 22:57:35,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498268248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:35,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:35,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-03-19 22:57:35,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113264556] [2022-03-19 22:57:35,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:35,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 22:57:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 22:57:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-19 22:57:35,196 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 9 states have internal predecessors, (22), 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 22:57:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:35,351 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-03-19 22:57:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 22:57:35,351 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 9 states have internal predecessors, (22), 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 26 [2022-03-19 22:57:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:35,351 INFO L225 Difference]: With dead ends: 59 [2022-03-19 22:57:35,351 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 22:57:35,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 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 22:57:35,352 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:35,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 51 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:57:35,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 22:57:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-03-19 22:57:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 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 22:57:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-03-19 22:57:35,359 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 26 [2022-03-19 22:57:35,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:35,360 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-03-19 22:57:35,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 9 states have internal predecessors, (22), 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 22:57:35,360 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-03-19 22:57:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 22:57:35,360 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:35,360 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:35,395 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 22:57:35,571 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,SelfDestructingSolverStorable14 [2022-03-19 22:57:35,572 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:35,572 INFO L85 PathProgramCache]: Analyzing trace with hash -603591809, now seen corresponding path program 11 times [2022-03-19 22:57:35,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:35,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421299352] [2022-03-19 22:57:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:35,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:35,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 22:57:35,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:35,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421299352] [2022-03-19 22:57:35,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421299352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:35,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810963556] [2022-03-19 22:57:35,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:57:35,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:35,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:35,692 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 22:57:35,710 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 22:57:35,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-19 22:57:35,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:35,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 22:57:35,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 22:57:35,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 22:57:36,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810963556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:36,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:36,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 29 [2022-03-19 22:57:36,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589744226] [2022-03-19 22:57:36,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:36,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 22:57:36,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:36,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 22:57:36,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-03-19 22:57:36,159 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 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 22:57:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:37,100 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-03-19 22:57:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 22:57:37,100 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 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 28 [2022-03-19 22:57:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:37,100 INFO L225 Difference]: With dead ends: 80 [2022-03-19 22:57:37,101 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 22:57:37,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=473, Invalid=3067, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 22:57:37,102 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:37,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 100 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 22:57:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 22:57:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-03-19 22:57:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-03-19 22:57:37,114 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 28 [2022-03-19 22:57:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:37,114 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-03-19 22:57:37,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 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 22:57:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-03-19 22:57:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 22:57:37,114 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:37,114 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:37,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 22:57:37,319 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,SelfDestructingSolverStorable15 [2022-03-19 22:57:37,319 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:37,319 INFO L85 PathProgramCache]: Analyzing trace with hash 646714815, now seen corresponding path program 12 times [2022-03-19 22:57:37,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:37,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150494639] [2022-03-19 22:57:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:37,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:37,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 22:57:37,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:37,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150494639] [2022-03-19 22:57:37,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150494639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:37,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541649515] [2022-03-19 22:57:37,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:57:37,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:37,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:37,427 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 22:57:37,428 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 22:57:37,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 22:57:37,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:37,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 22:57:37,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 22:57:37,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 22:57:37,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541649515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:37,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:37,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 13 [2022-03-19 22:57:37,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267580991] [2022-03-19 22:57:37,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:37,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 22:57:37,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:37,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 22:57:37,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-19 22:57:37,615 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 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 22:57:37,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:37,784 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-03-19 22:57:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 22:57:37,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 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 29 [2022-03-19 22:57:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:37,785 INFO L225 Difference]: With dead ends: 77 [2022-03-19 22:57:37,785 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 22:57:37,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-19 22:57:37,786 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:37,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 63 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:57:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 22:57:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-19 22:57:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-03-19 22:57:37,798 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 29 [2022-03-19 22:57:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:37,799 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-03-19 22:57:37,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 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 22:57:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-03-19 22:57:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 22:57:37,799 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:37,799 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:37,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 22:57:38,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:38,016 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:38,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1616740337, now seen corresponding path program 13 times [2022-03-19 22:57:38,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:38,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148587504] [2022-03-19 22:57:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:38,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:38,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 22:57:38,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:38,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148587504] [2022-03-19 22:57:38,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148587504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:38,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690667788] [2022-03-19 22:57:38,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:57:38,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:38,178 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 22:57:38,179 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 22:57:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:38,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 22:57:38,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:38,361 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 22:57:38,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 22:57:38,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690667788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:38,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:38,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 12] total 31 [2022-03-19 22:57:38,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463041155] [2022-03-19 22:57:38,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:38,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 22:57:38,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:38,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 22:57:38,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-03-19 22:57:38,602 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 22:57:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:39,874 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2022-03-19 22:57:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 22:57:39,875 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2022-03-19 22:57:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:39,875 INFO L225 Difference]: With dead ends: 163 [2022-03-19 22:57:39,875 INFO L226 Difference]: Without dead ends: 136 [2022-03-19 22:57:39,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1121, Invalid=4281, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 22:57:39,877 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 198 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:39,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 72 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 22:57:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-19 22:57:39,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 61. [2022-03-19 22:57:39,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:39,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-03-19 22:57:39,904 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 29 [2022-03-19 22:57:39,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:39,904 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-03-19 22:57:39,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 22:57:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-03-19 22:57:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 22:57:39,905 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:39,905 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:39,922 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 22:57:40,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 22:57:40,111 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1375844749, now seen corresponding path program 14 times [2022-03-19 22:57:40,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:40,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531862225] [2022-03-19 22:57:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:40,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:40,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 22:57:40,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:40,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531862225] [2022-03-19 22:57:40,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531862225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:40,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442811564] [2022-03-19 22:57:40,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:57:40,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:40,234 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 22:57:40,235 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 22:57:40,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:57:40,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:40,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 22:57:40,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 22:57:40,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 22:57:40,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442811564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:40,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:40,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 14 [2022-03-19 22:57:40,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417049302] [2022-03-19 22:57:40,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:40,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 22:57:40,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:40,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 22:57:40,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-03-19 22:57:40,402 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 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 22:57:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:40,597 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2022-03-19 22:57:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 22:57:40,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 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 32 [2022-03-19 22:57:40,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:40,598 INFO L225 Difference]: With dead ends: 88 [2022-03-19 22:57:40,598 INFO L226 Difference]: Without dead ends: 76 [2022-03-19 22:57:40,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-19 22:57:40,598 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:40,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 64 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:57:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-19 22:57:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2022-03-19 22:57:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 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 22:57:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-03-19 22:57:40,609 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 32 [2022-03-19 22:57:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:40,609 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-03-19 22:57:40,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 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 22:57:40,610 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-03-19 22:57:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 22:57:40,610 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:40,610 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:40,631 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 22:57:40,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:40,829 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:40,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1713776814, now seen corresponding path program 15 times [2022-03-19 22:57:40,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:40,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372388403] [2022-03-19 22:57:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:40,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:40,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 22:57:40,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:40,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372388403] [2022-03-19 22:57:40,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372388403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:40,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487193341] [2022-03-19 22:57:40,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:57:40,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:40,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:40,996 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 22:57:40,997 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 22:57:41,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 22:57:41,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 22:57:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 22:57:41,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 22:57:41,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487193341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:41,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:41,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 35 [2022-03-19 22:57:41,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151818134] [2022-03-19 22:57:41,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:41,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 22:57:41,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 22:57:41,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 22:57:41,508 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 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 22:57:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:44,821 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2022-03-19 22:57:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-19 22:57:44,821 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 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 22:57:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:44,822 INFO L225 Difference]: With dead ends: 128 [2022-03-19 22:57:44,822 INFO L226 Difference]: Without dead ends: 85 [2022-03-19 22:57:44,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=733, Invalid=6923, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 22:57:44,824 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:44,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 108 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 22:57:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-19 22:57:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2022-03-19 22:57:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 72 states have internal predecessors, (82), 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 22:57:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-03-19 22:57:44,846 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 32 [2022-03-19 22:57:44,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:44,846 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-03-19 22:57:44,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 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 22:57:44,846 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-03-19 22:57:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 22:57:44,847 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:44,847 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:44,865 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 22:57:45,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:45,064 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:45,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1838716096, now seen corresponding path program 16 times [2022-03-19 22:57:45,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:45,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468245670] [2022-03-19 22:57:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:45,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:45,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 22:57:45,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:45,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468245670] [2022-03-19 22:57:45,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468245670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:45,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787728993] [2022-03-19 22:57:45,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:57:45,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:45,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:45,228 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 22:57:45,229 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 22:57:45,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:57:45,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 22:57:45,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:57:45,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 22:57:45,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787728993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:45,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:45,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 14] total 37 [2022-03-19 22:57:45,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849211196] [2022-03-19 22:57:45,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:45,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 22:57:45,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 22:57:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 22:57:45,731 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 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 22:57:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:47,447 INFO L93 Difference]: Finished difference Result 200 states and 234 transitions. [2022-03-19 22:57:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 22:57:47,447 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 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 33 [2022-03-19 22:57:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:47,448 INFO L225 Difference]: With dead ends: 200 [2022-03-19 22:57:47,448 INFO L226 Difference]: Without dead ends: 187 [2022-03-19 22:57:47,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1751, Invalid=6439, Unknown=0, NotChecked=0, Total=8190 [2022-03-19 22:57:47,450 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 264 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:47,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 98 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 22:57:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-19 22:57:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 84. [2022-03-19 22:57:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.139240506329114) internal successors, (90), 79 states have internal predecessors, (90), 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 22:57:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-03-19 22:57:47,476 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 33 [2022-03-19 22:57:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:47,476 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-03-19 22:57:47,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 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 22:57:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-03-19 22:57:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 22:57:47,476 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:47,476 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:47,495 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 22:57:47,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:47,693 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:47,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:47,693 INFO L85 PathProgramCache]: Analyzing trace with hash 248285055, now seen corresponding path program 17 times [2022-03-19 22:57:47,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:47,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451008265] [2022-03-19 22:57:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:47,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:47,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 22:57:47,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:47,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451008265] [2022-03-19 22:57:47,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451008265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:47,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478375762] [2022-03-19 22:57:47,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:57:47,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:47,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:47,908 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 22:57:47,916 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 22:57:48,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 22:57:48,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:48,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 22:57:48,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 22:57:48,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 22:57:48,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478375762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:48,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:48,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 15 [2022-03-19 22:57:48,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566763288] [2022-03-19 22:57:48,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:48,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 22:57:48,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:48,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 22:57:48,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-03-19 22:57:48,596 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 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 22:57:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:48,829 INFO L93 Difference]: Finished difference Result 122 states and 135 transitions. [2022-03-19 22:57:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 22:57:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 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 22:57:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:48,830 INFO L225 Difference]: With dead ends: 122 [2022-03-19 22:57:48,830 INFO L226 Difference]: Without dead ends: 109 [2022-03-19 22:57:48,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-19 22:57:48,830 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:48,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 69 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:57:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-19 22:57:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2022-03-19 22:57:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 87 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-03-19 22:57:48,847 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 35 [2022-03-19 22:57:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:48,848 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-03-19 22:57:48,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 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 22:57:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-03-19 22:57:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 22:57:48,848 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:48,848 INFO L499 BasicCegarLoop]: trace histogram [9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:48,852 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 22:57:49,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:49,052 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:49,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:49,053 INFO L85 PathProgramCache]: Analyzing trace with hash 210525599, now seen corresponding path program 18 times [2022-03-19 22:57:49,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:49,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925814087] [2022-03-19 22:57:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:49,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:49,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 22:57:49,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:49,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925814087] [2022-03-19 22:57:49,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925814087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:49,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864887043] [2022-03-19 22:57:49,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:57:49,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:49,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:49,293 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 22:57:49,294 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 22:57:49,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 22:57:49,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:57:49,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 22:57:49,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 22:57:49,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 22:57:49,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864887043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:49,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:49,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 16] total 41 [2022-03-19 22:57:49,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240310576] [2022-03-19 22:57:49,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:49,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 22:57:49,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:49,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 22:57:49,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 22:57:49,954 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 40 states have internal predecessors, (53), 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 22:57:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:57:54,599 INFO L93 Difference]: Finished difference Result 160 states and 191 transitions. [2022-03-19 22:57:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-19 22:57:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 40 states have internal predecessors, (53), 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 22:57:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:57:54,600 INFO L225 Difference]: With dead ends: 160 [2022-03-19 22:57:54,600 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 22:57:54,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2978 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1227, Invalid=10763, Unknown=0, NotChecked=0, Total=11990 [2022-03-19 22:57:54,603 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 22:57:54,603 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 120 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 22:57:54,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 22:57:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2022-03-19 22:57:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 109 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:57:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2022-03-19 22:57:54,631 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 36 [2022-03-19 22:57:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:57:54,631 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2022-03-19 22:57:54,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 40 states have internal predecessors, (53), 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 22:57:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2022-03-19 22:57:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 22:57:54,632 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:57:54,632 INFO L499 BasicCegarLoop]: trace histogram [10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:57:54,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 22:57:54,847 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,SelfDestructingSolverStorable22 [2022-03-19 22:57:54,848 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:57:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:57:54,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1139261807, now seen corresponding path program 19 times [2022-03-19 22:57:54,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:57:54,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364381373] [2022-03-19 22:57:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:57:54,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:57:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:55,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:57:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 22:57:55,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:57:55,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364381373] [2022-03-19 22:57:55,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364381373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:57:55,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421909098] [2022-03-19 22:57:55,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:57:55,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:57:55,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:57:55,116 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 22:57:55,132 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 22:57:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:57:55,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 22:57:55,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:57:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 22:57:55,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:57:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 22:57:55,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421909098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:57:55,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:57:55,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-19 22:57:55,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446389205] [2022-03-19 22:57:55,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:57:55,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 22:57:55,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:57:55,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 22:57:55,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 22:57:55,682 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 42 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 41 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 22:58:36,314 WARN L232 SmtUtils]: Spent 21.29s 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 22:59:01,551 WARN L232 SmtUtils]: Spent 17.78s 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 22:59:19,896 WARN L232 SmtUtils]: Spent 11.96s 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 22:59:35,952 WARN L232 SmtUtils]: Spent 8.87s 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 22:59:53,115 WARN L232 SmtUtils]: Spent 10.00s 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 23:00:10,292 WARN L232 SmtUtils]: Spent 11.52s 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 23:00:25,742 WARN L232 SmtUtils]: Spent 10.97s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:00:35,456 WARN L232 SmtUtils]: Spent 5.66s 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 23:01:00,356 WARN L232 SmtUtils]: Spent 5.97s 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 23:03:02,076 WARN L232 SmtUtils]: Spent 13.14s 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 23:03:24,667 WARN L232 SmtUtils]: Spent 10.72s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:03:39,462 WARN L232 SmtUtils]: Spent 8.87s 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 23:03:56,843 WARN L232 SmtUtils]: Spent 7.22s 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 23:04:09,218 WARN L232 SmtUtils]: Spent 7.34s 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 23:04:20,185 WARN L232 SmtUtils]: Spent 6.10s 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 23:04:31,412 WARN L232 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:04:52,897 WARN L232 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:05:37,236 WARN L232 SmtUtils]: Spent 6.32s 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 23:06:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:07,810 INFO L93 Difference]: Finished difference Result 341 states and 412 transitions. [2022-03-19 23:06:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2022-03-19 23:06:07,810 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 41 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 37 [2022-03-19 23:06:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:07,811 INFO L225 Difference]: With dead ends: 341 [2022-03-19 23:06:07,811 INFO L226 Difference]: Without dead ends: 312 [2022-03-19 23:06:07,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29540 ImplicationChecksByTransitivity, 486.8s TimeCoverageRelationStatistics Valid=11398, Invalid=66164, Unknown=0, NotChecked=0, Total=77562 [2022-03-19 23:06:07,821 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 441 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 1744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1744 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:07,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 119 Invalid, 2901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1744 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-19 23:06:07,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-19 23:06:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 171. [2022-03-19 23:06:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.1867469879518073) internal successors, (197), 166 states have internal predecessors, (197), 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 23:06:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 201 transitions. [2022-03-19 23:06:07,892 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 201 transitions. Word has length 37 [2022-03-19 23:06:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:07,893 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 201 transitions. [2022-03-19 23:06:07,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 41 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 23:06:07,893 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 201 transitions. [2022-03-19 23:06:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 23:06:07,893 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:07,893 INFO L499 BasicCegarLoop]: trace histogram [12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:07,910 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 23:06:08,094 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,SelfDestructingSolverStorable23 [2022-03-19 23:06:08,095 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:08,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1526884787, now seen corresponding path program 20 times [2022-03-19 23:06:08,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:08,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825697053] [2022-03-19 23:06:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:08,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:08,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:06:08,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825697053] [2022-03-19 23:06:08,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825697053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763103736] [2022-03-19 23:06:08,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:06:08,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:08,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:08,282 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 23:06:08,283 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 23:06:08,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:06:08,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:08,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 23:06:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:06:08,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:06:08,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763103736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:08,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:08,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 38 [2022-03-19 23:06:08,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841313620] [2022-03-19 23:06:08,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:08,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 23:06:08,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 23:06:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 23:06:08,888 INFO L87 Difference]: Start difference. First operand 171 states and 201 transitions. Second operand has 38 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 37 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 23:06:12,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:12,104 INFO L93 Difference]: Finished difference Result 250 states and 282 transitions. [2022-03-19 23:06:12,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 23:06:12,105 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 37 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 38 [2022-03-19 23:06:12,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:12,106 INFO L225 Difference]: With dead ends: 250 [2022-03-19 23:06:12,106 INFO L226 Difference]: Without dead ends: 224 [2022-03-19 23:06:12,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1228, Invalid=6254, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 23:06:12,108 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 218 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:12,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 103 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:06:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-19 23:06:12,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 140. [2022-03-19 23:06:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.2) internal successors, (162), 135 states have internal predecessors, (162), 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 23:06:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2022-03-19 23:06:12,153 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 38 [2022-03-19 23:06:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:12,154 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2022-03-19 23:06:12,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 37 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 23:06:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2022-03-19 23:06:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 23:06:12,154 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:12,154 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:12,172 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 23:06:12,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:12,360 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:12,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash 402939981, now seen corresponding path program 21 times [2022-03-19 23:06:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:12,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654832608] [2022-03-19 23:06:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:12,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:12,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:06:12,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:12,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654832608] [2022-03-19 23:06:12,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654832608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:12,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946435166] [2022-03-19 23:06:12,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:06:12,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:12,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:12,529 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 23:06:12,555 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 23:06:12,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 23:06:12,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:12,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 23:06:12,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:06:12,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:06:12,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946435166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:12,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:12,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 16 [2022-03-19 23:06:12,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300588718] [2022-03-19 23:06:12,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:12,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 23:06:12,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:12,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 23:06:12,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:06:12,827 INFO L87 Difference]: Start difference. First operand 140 states and 166 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 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 23:06:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:13,082 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2022-03-19 23:06:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 23:06:13,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 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 38 [2022-03-19 23:06:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:13,083 INFO L225 Difference]: With dead ends: 182 [2022-03-19 23:06:13,083 INFO L226 Difference]: Without dead ends: 168 [2022-03-19 23:06:13,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-19 23:06:13,084 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:13,084 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 84 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:06:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-19 23:06:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2022-03-19 23:06:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 146 states have internal predecessors, (175), 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 23:06:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2022-03-19 23:06:13,143 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 38 [2022-03-19 23:06:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:13,143 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2022-03-19 23:06:13,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 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 23:06:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2022-03-19 23:06:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 23:06:13,144 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:13,144 INFO L499 BasicCegarLoop]: trace histogram [13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:13,162 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 23:06:13,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:13,356 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:13,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:13,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1471527041, now seen corresponding path program 22 times [2022-03-19 23:06:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:13,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973613770] [2022-03-19 23:06:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:13,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:13,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 48 proven. 56 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-19 23:06:13,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:13,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973613770] [2022-03-19 23:06:13,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973613770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:13,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070671732] [2022-03-19 23:06:13,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:06:13,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:13,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:13,512 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 23:06:13,513 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 23:06:13,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:06:13,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:13,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 23:06:13,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 48 proven. 56 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-19 23:06:13,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 48 proven. 56 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-19 23:06:14,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070671732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:14,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:14,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2022-03-19 23:06:14,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005409116] [2022-03-19 23:06:14,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:14,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 23:06:14,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:14,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 23:06:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 23:06:14,068 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 42 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 23:06:19,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:19,392 INFO L93 Difference]: Finished difference Result 300 states and 336 transitions. [2022-03-19 23:06:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 23:06:19,393 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 42 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 41 [2022-03-19 23:06:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:19,394 INFO L225 Difference]: With dead ends: 300 [2022-03-19 23:06:19,394 INFO L226 Difference]: Without dead ends: 272 [2022-03-19 23:06:19,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1693, Invalid=8813, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 23:06:19,395 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 295 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:19,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 113 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 23:06:19,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-19 23:06:19,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 126. [2022-03-19 23:06:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.1983471074380165) internal successors, (145), 121 states have internal predecessors, (145), 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 23:06:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-03-19 23:06:19,432 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 41 [2022-03-19 23:06:19,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:19,432 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-03-19 23:06:19,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 42 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 23:06:19,432 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-03-19 23:06:19,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 23:06:19,433 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:19,433 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:19,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-19 23:06:19,637 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,SelfDestructingSolverStorable26 [2022-03-19 23:06:19,637 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:19,637 INFO L85 PathProgramCache]: Analyzing trace with hash 11643199, now seen corresponding path program 23 times [2022-03-19 23:06:19,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:19,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31168452] [2022-03-19 23:06:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:19,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:19,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 23:06:19,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:19,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31168452] [2022-03-19 23:06:19,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31168452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:19,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412852293] [2022-03-19 23:06:19,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:06:19,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:19,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:19,837 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 23:06:19,838 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 23:06:22,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-19 23:06:22,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:22,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 23:06:22,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 90 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:06:22,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 23:06:22,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412852293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:22,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:22,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 18 [2022-03-19 23:06:22,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047751218] [2022-03-19 23:06:22,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:22,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:06:22,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:06:22,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:06:22,481 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 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 23:06:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:22,845 INFO L93 Difference]: Finished difference Result 164 states and 190 transitions. [2022-03-19 23:06:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 23:06:22,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 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 23:06:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:22,846 INFO L225 Difference]: With dead ends: 164 [2022-03-19 23:06:22,846 INFO L226 Difference]: Without dead ends: 149 [2022-03-19 23:06:22,848 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:06:22,849 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:22,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 84 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:06:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-19 23:06:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 136. [2022-03-19 23:06:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 131 states have internal predecessors, (156), 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 23:06:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2022-03-19 23:06:22,896 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 41 [2022-03-19 23:06:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:22,896 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2022-03-19 23:06:22,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 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 23:06:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2022-03-19 23:06:22,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 23:06:22,897 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:22,897 INFO L499 BasicCegarLoop]: trace histogram [11, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:22,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 23:06:23,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 23:06:23,102 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:23,103 INFO L85 PathProgramCache]: Analyzing trace with hash 451640223, now seen corresponding path program 24 times [2022-03-19 23:06:23,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:23,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001994002] [2022-03-19 23:06:23,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:23,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:23,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 23:06:23,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:23,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001994002] [2022-03-19 23:06:23,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001994002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:23,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674848582] [2022-03-19 23:06:23,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:06:23,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:23,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:23,373 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 23:06:23,374 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 23:06:23,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 23:06:23,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:23,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 23:06:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 23:06:23,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 23:06:24,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674848582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:24,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:24,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 20] total 51 [2022-03-19 23:06:24,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166685845] [2022-03-19 23:06:24,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:24,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:06:24,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:24,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:06:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:06:24,381 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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 23:06:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:38,894 INFO L93 Difference]: Finished difference Result 201 states and 241 transitions. [2022-03-19 23:06:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-19 23:06:38,896 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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 23:06:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:38,896 INFO L225 Difference]: With dead ends: 201 [2022-03-19 23:06:38,896 INFO L226 Difference]: Without dead ends: 168 [2022-03-19 23:06:38,897 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4970 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1861, Invalid=17599, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 23:06:38,898 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1982 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:38,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 145 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1982 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 23:06:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-19 23:06:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 156. [2022-03-19 23:06:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.1721854304635762) internal successors, (177), 151 states have internal predecessors, (177), 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 23:06:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 181 transitions. [2022-03-19 23:06:38,963 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 181 transitions. Word has length 42 [2022-03-19 23:06:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:38,963 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 181 transitions. [2022-03-19 23:06:38,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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 23:06:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 181 transitions. [2022-03-19 23:06:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 23:06:38,964 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:38,964 INFO L499 BasicCegarLoop]: trace histogram [12, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:38,982 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 23:06:39,169 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,SelfDestructingSolverStorable28 [2022-03-19 23:06:39,170 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1048046865, now seen corresponding path program 25 times [2022-03-19 23:06:39,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:39,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883281782] [2022-03-19 23:06:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:39,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:06:39,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883281782] [2022-03-19 23:06:39,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883281782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400412142] [2022-03-19 23:06:39,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:06:39,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:39,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:39,547 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 23:06:39,548 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 23:06:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:39,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 23:06:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:06:39,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:06:40,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400412142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:40,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:40,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-19 23:06:40,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040605646] [2022-03-19 23:06:40,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:40,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 23:06:40,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:40,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 23:06:40,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2088, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 23:06:40,373 INFO L87 Difference]: Start difference. First operand 156 states and 181 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 49 states have internal predecessors, (60), 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 23:08:04,039 WARN L232 SmtUtils]: Spent 42.70s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:09:11,371 WARN L232 SmtUtils]: Spent 40.24s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:10:00,282 WARN L232 SmtUtils]: Spent 30.18s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:10:50,650 WARN L232 SmtUtils]: Spent 23.95s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 23:11:42,211 WARN L232 SmtUtils]: Spent 36.34s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)