/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/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:20:05,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:20:05,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:20:05,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:20:05,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 23:20:05,878 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:20:05,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:20:05,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:20:05,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:20:05,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:20:05,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:20:05,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:20:05,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:20:05,880 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:20:05,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:20:05,880 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:20:05,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:20:05,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:20:05,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:20:05,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:20:05,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:20:05,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:20:05,882 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:20:05,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:20:05,882 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:20:05,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:20:05,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:20:05,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:20:05,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:20:05,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:20:05,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:20:05,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:20:05,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:20:05,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:20:05,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:20:05,883 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:20:05,883 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:20:05,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:20:05,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:20:06,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:20:06,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:20:06,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:20:06,108 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:20:06,108 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:20:06,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-19 23:20:06,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f4dcd97d/1188a213677149e89256312a5759190f/FLAG4457be19b [2022-03-19 23:20:06,476 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:20:06,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-03-19 23:20:06,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f4dcd97d/1188a213677149e89256312a5759190f/FLAG4457be19b [2022-03-19 23:20:06,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f4dcd97d/1188a213677149e89256312a5759190f [2022-03-19 23:20:06,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:20:06,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:20:06,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:20:06,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:20:06,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:20:06,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:20:06" (1/1) ... [2022-03-19 23:20:06,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71931fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:20:06, skipping insertion in model container [2022-03-19 23:20:06,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:20:06" (1/1) ... [2022-03-19 23:20:06,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:20:06,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:20:07,003 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/theatreSquare.c[370,383] [2022-03-19 23:20:07,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:20:07,026 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:20:07,033 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/theatreSquare.c[370,383] [2022-03-19 23:20:07,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:20:07,046 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:20:07,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:20:07 WrapperNode [2022-03-19 23:20:07,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:20:07,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:20:07,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:20:07,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:20:07,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:20:07" (1/1) ... [2022-03-19 23:20:07,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:20:07" (1/1) ... [2022-03-19 23:20:07,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:20:07" (1/1) ... [2022-03-19 23:20:07,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:20:07" (1/1) ... [2022-03-19 23:20:07,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:20:07" (1/1) ... [2022-03-19 23:20:07,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:20:07" (1/1) ... [2022-03-19 23:20:07,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:20:07" (1/1) ... [2022-03-19 23:20:07,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:20:07,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:20:07,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:20:07,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:20:07,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:20:07" (1/1) ... [2022-03-19 23:20:07,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:20:07,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:07,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 23:20:07,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 23:20:07,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:20:07,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:20:07,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:20:07,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:20:07,132 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-03-19 23:20:07,133 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-03-19 23:20:07,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:20:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:20:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:20:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:20:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:20:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 23:20:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:20:07,133 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-03-19 23:20:07,134 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-03-19 23:20:07,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:20:07,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:20:07,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:20:07,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:20:07,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:20:07,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:20:07,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:20:07,213 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:20:07,214 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:20:07,354 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:20:07,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:20:07,358 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-19 23:20:07,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:20:07 BoogieIcfgContainer [2022-03-19 23:20:07,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:20:07,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:20:07,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:20:07,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:20:07,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:20:06" (1/3) ... [2022-03-19 23:20:07,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48578fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:20:07, skipping insertion in model container [2022-03-19 23:20:07,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:20:07" (2/3) ... [2022-03-19 23:20:07,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48578fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:20:07, skipping insertion in model container [2022-03-19 23:20:07,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:20:07" (3/3) ... [2022-03-19 23:20:07,364 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2022-03-19 23:20:07,367 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:20:07,367 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:20:07,395 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:20:07,399 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 23:20:07,399 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:20:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 23:20:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 23:20:07,412 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:07,412 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:07,413 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 1 times [2022-03-19 23:20:07,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:07,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870603365] [2022-03-19 23:20:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:07,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:07,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:20:07,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:07,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870603365] [2022-03-19 23:20:07,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870603365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:20:07,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:20:07,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 23:20:07,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875475460] [2022-03-19 23:20:07,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:20:07,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 23:20:07,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:07,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 23:20:07,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:20:07,574 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 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 23:20:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:07,696 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-19 23:20:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:20:07,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-03-19 23:20:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:07,702 INFO L225 Difference]: With dead ends: 76 [2022-03-19 23:20:07,702 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 23:20:07,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:20:07,706 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:07,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:20:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 23:20:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 23:20:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:20:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-03-19 23:20:07,729 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-03-19 23:20:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:07,729 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-03-19 23:20:07,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 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 23:20:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-03-19 23:20:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 23:20:07,731 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:07,731 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:07,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:20:07,731 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:07,732 INFO L85 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 1 times [2022-03-19 23:20:07,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:07,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908118107] [2022-03-19 23:20:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:07,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:07,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:07,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:07,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 23:20:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:20:07,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:07,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908118107] [2022-03-19 23:20:07,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908118107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:20:07,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:20:07,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 23:20:07,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061913544] [2022-03-19 23:20:07,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:20:07,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 23:20:07,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:07,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 23:20:07,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-19 23:20:07,936 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:08,226 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-03-19 23:20:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 23:20:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-19 23:20:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:08,229 INFO L225 Difference]: With dead ends: 50 [2022-03-19 23:20:08,229 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 23:20:08,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-19 23:20:08,234 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:08,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 80 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:20:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 23:20:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-19 23:20:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:20:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-19 23:20:08,271 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2022-03-19 23:20:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:08,272 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-19 23:20:08,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:08,272 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-19 23:20:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 23:20:08,273 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:08,273 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:08,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:20:08,274 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash -310269904, now seen corresponding path program 1 times [2022-03-19 23:20:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:08,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485918640] [2022-03-19 23:20:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:08,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 23:20:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:20:08,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:08,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485918640] [2022-03-19 23:20:08,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485918640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:20:08,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:20:08,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:20:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525243235] [2022-03-19 23:20:08,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:20:08,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:20:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:20:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:20:08,347 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:08,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:08,414 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-03-19 23:20:08,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:20:08,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-03-19 23:20:08,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:08,416 INFO L225 Difference]: With dead ends: 59 [2022-03-19 23:20:08,416 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 23:20:08,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:20:08,417 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:08,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 45 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:20:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 23:20:08,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-03-19 23:20:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:20:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-03-19 23:20:08,424 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 32 [2022-03-19 23:20:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:08,424 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-03-19 23:20:08,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-03-19 23:20:08,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 23:20:08,425 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:08,425 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:08,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 23:20:08,425 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:08,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:08,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1053423629, now seen corresponding path program 1 times [2022-03-19 23:20:08,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:08,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339993459] [2022-03-19 23:20:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:08,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 23:20:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:20:08,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:08,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339993459] [2022-03-19 23:20:08,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339993459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:20:08,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:20:08,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:20:08,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160093437] [2022-03-19 23:20:08,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:20:08,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:20:08,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:08,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:20:08,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:20:08,500 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:08,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:08,562 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-03-19 23:20:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:20:08,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-03-19 23:20:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:08,563 INFO L225 Difference]: With dead ends: 81 [2022-03-19 23:20:08,563 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 23:20:08,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:20:08,564 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:08,565 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:20:08,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 23:20:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-03-19 23:20:08,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 40 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:20:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-03-19 23:20:08,570 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 32 [2022-03-19 23:20:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:08,570 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-03-19 23:20:08,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-03-19 23:20:08,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 23:20:08,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:08,571 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:08,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 23:20:08,572 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash 755216986, now seen corresponding path program 1 times [2022-03-19 23:20:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:08,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181921664] [2022-03-19 23:20:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:08,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 23:20:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:08,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:08,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181921664] [2022-03-19 23:20:08,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181921664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:20:08,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:20:08,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 23:20:08,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955151942] [2022-03-19 23:20:08,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:20:08,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 23:20:08,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 23:20:08,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:20:08,628 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:20:08,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:08,700 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2022-03-19 23:20:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:20:08,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-19 23:20:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:08,701 INFO L225 Difference]: With dead ends: 77 [2022-03-19 23:20:08,701 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 23:20:08,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:20:08,702 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:08,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 50 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:20:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 23:20:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 23:20:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:20:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-03-19 23:20:08,707 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 33 [2022-03-19 23:20:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:08,707 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-03-19 23:20:08,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:20:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-03-19 23:20:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 23:20:08,708 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:08,708 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:08,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 23:20:08,708 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:08,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1803948538, now seen corresponding path program 1 times [2022-03-19 23:20:08,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:08,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548093637] [2022-03-19 23:20:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:08,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 23:20:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:08,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:08,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548093637] [2022-03-19 23:20:08,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548093637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:20:08,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:20:08,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 23:20:08,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483752456] [2022-03-19 23:20:08,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:20:08,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 23:20:08,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:08,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 23:20:08,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:20:08,757 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:20:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:08,829 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-03-19 23:20:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:20:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-19 23:20:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:08,830 INFO L225 Difference]: With dead ends: 83 [2022-03-19 23:20:08,830 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 23:20:08,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:20:08,831 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:08,831 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:20:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 23:20:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-19 23:20:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:20:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-03-19 23:20:08,835 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 33 [2022-03-19 23:20:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:08,835 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-03-19 23:20:08,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:20:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-03-19 23:20:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 23:20:08,836 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:08,836 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:08,836 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 23:20:08,837 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:08,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:08,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1563500484, now seen corresponding path program 1 times [2022-03-19 23:20:08,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:08,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092618912] [2022-03-19 23:20:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:08,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:20:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:20:08,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:08,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092618912] [2022-03-19 23:20:08,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092618912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:20:08,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:20:08,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 23:20:08,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353912871] [2022-03-19 23:20:08,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:20:08,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 23:20:08,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:08,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 23:20:08,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:20:08,898 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:08,968 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-03-19 23:20:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:20:08,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-03-19 23:20:08,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:08,970 INFO L225 Difference]: With dead ends: 57 [2022-03-19 23:20:08,970 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 23:20:08,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:20:08,970 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:08,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:20:08,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 23:20:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-19 23:20:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:20:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-03-19 23:20:08,974 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 34 [2022-03-19 23:20:08,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:08,974 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-03-19 23:20:08,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-03-19 23:20:08,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 23:20:08,975 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:08,975 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:08,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 23:20:08,976 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:08,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:08,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1234948107, now seen corresponding path program 1 times [2022-03-19 23:20:08,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:08,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713916431] [2022-03-19 23:20:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:08,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:08,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 23:20:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:20:09,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:09,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713916431] [2022-03-19 23:20:09,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713916431] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:20:09,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:20:09,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 23:20:09,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384522072] [2022-03-19 23:20:09,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:20:09,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 23:20:09,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:09,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 23:20:09,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:20:09,017 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:09,079 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2022-03-19 23:20:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:20:09,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-03-19 23:20:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:09,080 INFO L225 Difference]: With dead ends: 64 [2022-03-19 23:20:09,080 INFO L226 Difference]: Without dead ends: 40 [2022-03-19 23:20:09,080 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:20:09,080 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:09,081 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 49 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:20:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-19 23:20:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-03-19 23:20:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:20:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-03-19 23:20:09,083 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 35 [2022-03-19 23:20:09,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:09,083 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-03-19 23:20:09,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-03-19 23:20:09,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 23:20:09,084 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:09,084 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:09,084 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-19 23:20:09,084 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2078941294, now seen corresponding path program 1 times [2022-03-19 23:20:09,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:09,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949389440] [2022-03-19 23:20:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:09,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:20:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:20:09,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:09,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949389440] [2022-03-19 23:20:09,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949389440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:20:09,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:20:09,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 23:20:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335367892] [2022-03-19 23:20:09,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:20:09,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 23:20:09,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:09,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 23:20:09,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-19 23:20:09,133 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:09,212 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-03-19 23:20:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:20:09,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-03-19 23:20:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:09,213 INFO L225 Difference]: With dead ends: 46 [2022-03-19 23:20:09,213 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 23:20:09,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:20:09,213 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:09,213 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 49 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:20:09,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 23:20:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 23:20:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:20:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-03-19 23:20:09,216 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 35 [2022-03-19 23:20:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:09,216 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-03-19 23:20:09,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-03-19 23:20:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 23:20:09,217 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:09,217 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:09,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 23:20:09,217 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1371807532, now seen corresponding path program 1 times [2022-03-19 23:20:09,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:09,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78471654] [2022-03-19 23:20:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:20:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 23:20:09,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:09,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78471654] [2022-03-19 23:20:09,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78471654] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:20:09,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:20:09,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 23:20:09,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635994415] [2022-03-19 23:20:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:20:09,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 23:20:09,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 23:20:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:20:09,260 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:09,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:09,331 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-03-19 23:20:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:20:09,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-19 23:20:09,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:09,332 INFO L225 Difference]: With dead ends: 50 [2022-03-19 23:20:09,332 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 23:20:09,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:20:09,333 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:09,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 50 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:20:09,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 23:20:09,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 23:20:09,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:20:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-03-19 23:20:09,336 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 36 [2022-03-19 23:20:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:09,336 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-03-19 23:20:09,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-03-19 23:20:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 23:20:09,336 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:09,336 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:09,336 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-19 23:20:09,337 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:09,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1443111891, now seen corresponding path program 1 times [2022-03-19 23:20:09,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:09,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263443301] [2022-03-19 23:20:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:09,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:20:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:09,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:09,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263443301] [2022-03-19 23:20:09,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263443301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:09,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23079739] [2022-03-19 23:20:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:09,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:09,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:09,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:09,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:20:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:09,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 23:20:09,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:09,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:10,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23079739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:10,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:10,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 25 [2022-03-19 23:20:10,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647287416] [2022-03-19 23:20:10,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:10,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 23:20:10,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:10,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 23:20:10,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2022-03-19 23:20:10,152 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:10,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:10,644 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2022-03-19 23:20:10,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 23:20:10,645 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-03-19 23:20:10,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:10,645 INFO L225 Difference]: With dead ends: 70 [2022-03-19 23:20:10,645 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 23:20:10,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 23:20:10,646 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:10,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 113 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:20:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 23:20:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-03-19 23:20:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:20:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-03-19 23:20:10,658 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 37 [2022-03-19 23:20:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:10,658 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-03-19 23:20:10,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-03-19 23:20:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 23:20:10,659 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:10,659 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:10,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:10,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 23:20:10,860 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:10,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:10,860 INFO L85 PathProgramCache]: Analyzing trace with hash -437658803, now seen corresponding path program 2 times [2022-03-19 23:20:10,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:10,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395868586] [2022-03-19 23:20:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:10,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:10,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:10,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:10,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:20:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:10,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:10,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395868586] [2022-03-19 23:20:10,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395868586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:10,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201888950] [2022-03-19 23:20:10,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:20:10,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:10,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:10,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:10,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:20:10,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:20:10,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:10,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 23:20:10,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:11,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:11,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201888950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:11,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:11,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-03-19 23:20:11,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354929697] [2022-03-19 23:20:11,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:11,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 23:20:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 23:20:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:20:11,103 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:11,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:11,180 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-03-19 23:20:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 23:20:11,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-03-19 23:20:11,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:11,181 INFO L225 Difference]: With dead ends: 80 [2022-03-19 23:20:11,181 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 23:20:11,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:20:11,182 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:11,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:20:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 23:20:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-03-19 23:20:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:20:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-03-19 23:20:11,197 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 38 [2022-03-19 23:20:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:11,197 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-03-19 23:20:11,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-03-19 23:20:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 23:20:11,200 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:11,200 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:11,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:11,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 23:20:11,417 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1488699212, now seen corresponding path program 3 times [2022-03-19 23:20:11,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:11,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47546850] [2022-03-19 23:20:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:11,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:11,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:11,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:11,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:20:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:11,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:11,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47546850] [2022-03-19 23:20:11,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47546850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:11,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625460949] [2022-03-19 23:20:11,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:20:11,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:11,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:11,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:11,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:20:11,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-19 23:20:11,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:11,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:20:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:11,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:11,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625460949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:11,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:11,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-03-19 23:20:11,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585504757] [2022-03-19 23:20:11,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:11,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 23:20:11,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 23:20:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-19 23:20:11,902 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:12,177 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-03-19 23:20:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 23:20:12,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-03-19 23:20:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:12,178 INFO L225 Difference]: With dead ends: 82 [2022-03-19 23:20:12,178 INFO L226 Difference]: Without dead ends: 76 [2022-03-19 23:20:12,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-19 23:20:12,179 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 90 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:12,179 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 76 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:20:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-19 23:20:12,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-03-19 23:20:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-19 23:20:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-03-19 23:20:12,184 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 38 [2022-03-19 23:20:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:12,184 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-03-19 23:20:12,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-03-19 23:20:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 23:20:12,185 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:12,185 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:12,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:12,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:12,402 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1229776654, now seen corresponding path program 4 times [2022-03-19 23:20:12,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:12,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110800390] [2022-03-19 23:20:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:12,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:12,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:12,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:12,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 23:20:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:12,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:12,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110800390] [2022-03-19 23:20:12,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110800390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:12,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866865044] [2022-03-19 23:20:12,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:20:12,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:12,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:12,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:12,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:20:12,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:20:12,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:12,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 23:20:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:12,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:12,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866865044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:12,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:12,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-03-19 23:20:12,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991804542] [2022-03-19 23:20:12,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:12,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 23:20:12,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:12,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 23:20:12,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:20:12,640 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:12,722 INFO L93 Difference]: Finished difference Result 140 states and 174 transitions. [2022-03-19 23:20:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 23:20:12,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-03-19 23:20:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:12,723 INFO L225 Difference]: With dead ends: 140 [2022-03-19 23:20:12,723 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 23:20:12,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:20:12,726 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:12,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:20:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 23:20:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-03-19 23:20:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-19 23:20:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2022-03-19 23:20:12,752 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 38 [2022-03-19 23:20:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:12,752 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2022-03-19 23:20:12,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2022-03-19 23:20:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 23:20:12,753 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:12,753 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:12,782 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 23:20:12,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:12,969 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:12,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1473231215, now seen corresponding path program 5 times [2022-03-19 23:20:12,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:12,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403217920] [2022-03-19 23:20:12,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:12,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:12,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:12,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:13,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 23:20:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:13,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:13,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403217920] [2022-03-19 23:20:13,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403217920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:13,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109734761] [2022-03-19 23:20:13,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:20:13,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:13,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:13,069 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:13,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:20:13,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:20:13,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:20:13,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:13,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:13,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109734761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:13,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:13,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-03-19 23:20:13,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669508451] [2022-03-19 23:20:13,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:13,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 23:20:13,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:13,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 23:20:13,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-19 23:20:13,439 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:13,729 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-03-19 23:20:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 23:20:13,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-03-19 23:20:13,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:13,730 INFO L225 Difference]: With dead ends: 92 [2022-03-19 23:20:13,730 INFO L226 Difference]: Without dead ends: 86 [2022-03-19 23:20:13,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-19 23:20:13,731 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 81 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:13,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 95 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:20:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-19 23:20:13,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-03-19 23:20:13,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 23:20:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-03-19 23:20:13,737 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 38 [2022-03-19 23:20:13,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:13,737 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-03-19 23:20:13,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:13,737 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-03-19 23:20:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 23:20:13,737 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:13,738 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:13,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 23:20:13,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 23:20:13,963 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1109766783, now seen corresponding path program 6 times [2022-03-19 23:20:13,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:13,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637034303] [2022-03-19 23:20:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:13,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:14,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:14,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:14,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:20:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:14,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:14,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637034303] [2022-03-19 23:20:14,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637034303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:14,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728209104] [2022-03-19 23:20:14,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:20:14,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:14,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:14,117 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:14,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:20:14,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-19 23:20:14,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:20:14,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:14,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:14,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728209104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:14,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:14,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-03-19 23:20:14,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795602544] [2022-03-19 23:20:14,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:14,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 23:20:14,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 23:20:14,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-19 23:20:14,600 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:14,895 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-03-19 23:20:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 23:20:14,895 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-03-19 23:20:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:14,896 INFO L225 Difference]: With dead ends: 108 [2022-03-19 23:20:14,896 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 23:20:14,897 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-03-19 23:20:14,898 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:14,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 89 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:20:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 23:20:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-03-19 23:20:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 77 states have internal predecessors, (88), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-19 23:20:14,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-03-19 23:20:14,909 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 39 [2022-03-19 23:20:14,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:14,909 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-03-19 23:20:14,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-03-19 23:20:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 23:20:14,910 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:14,910 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:14,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:15,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 23:20:15,126 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1701022282, now seen corresponding path program 7 times [2022-03-19 23:20:15,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:15,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196126384] [2022-03-19 23:20:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:15,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:15,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:15,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:15,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 23:20:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:15,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:15,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196126384] [2022-03-19 23:20:15,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196126384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:15,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779601394] [2022-03-19 23:20:15,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:20:15,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:15,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:15,436 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:15,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:20:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:15,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 23:20:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:15,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:15,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779601394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:15,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:15,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 27 [2022-03-19 23:20:15,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087602656] [2022-03-19 23:20:15,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:15,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 23:20:15,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:15,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 23:20:15,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-03-19 23:20:15,927 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:16,565 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2022-03-19 23:20:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 23:20:16,565 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-03-19 23:20:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:16,566 INFO L225 Difference]: With dead ends: 137 [2022-03-19 23:20:16,566 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 23:20:16,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=1901, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 23:20:16,567 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 86 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:16,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 128 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:20:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 23:20:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-03-19 23:20:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 107 states have internal predecessors, (120), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 23:20:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2022-03-19 23:20:16,575 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 39 [2022-03-19 23:20:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:16,576 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2022-03-19 23:20:16,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2022-03-19 23:20:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 23:20:16,576 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:16,576 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:16,595 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 23:20:16,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:16,793 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1844910907, now seen corresponding path program 8 times [2022-03-19 23:20:16,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:16,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635613948] [2022-03-19 23:20:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:16,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:16,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:16,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:16,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:20:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:16,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:16,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635613948] [2022-03-19 23:20:16,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635613948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:16,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556872030] [2022-03-19 23:20:16,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:20:16,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:16,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:16,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:16,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:20:16,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:20:16,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:16,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:20:16,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:17,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:17,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556872030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:17,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:17,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-03-19 23:20:17,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938614498] [2022-03-19 23:20:17,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:17,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 23:20:17,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 23:20:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-19 23:20:17,296 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:17,594 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2022-03-19 23:20:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 23:20:17,595 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-03-19 23:20:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:17,595 INFO L225 Difference]: With dead ends: 132 [2022-03-19 23:20:17,596 INFO L226 Difference]: Without dead ends: 120 [2022-03-19 23:20:17,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-03-19 23:20:17,596 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 87 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:17,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 99 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:20:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-19 23:20:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2022-03-19 23:20:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 104 states have internal predecessors, (116), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-19 23:20:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2022-03-19 23:20:17,603 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 39 [2022-03-19 23:20:17,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:17,604 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2022-03-19 23:20:17,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:17,604 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2022-03-19 23:20:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 23:20:17,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:17,604 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:17,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:17,823 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,SelfDestructingSolverStorable17 [2022-03-19 23:20:17,824 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:17,824 INFO L85 PathProgramCache]: Analyzing trace with hash 172610767, now seen corresponding path program 9 times [2022-03-19 23:20:17,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:17,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222467184] [2022-03-19 23:20:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:17,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:17,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:17,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:17,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 23:20:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:17,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:17,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222467184] [2022-03-19 23:20:17,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222467184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:17,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314778070] [2022-03-19 23:20:17,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:20:17,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:17,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:17,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:17,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:20:18,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 23:20:18,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:20:18,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:18,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:18,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314778070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:18,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:18,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-03-19 23:20:18,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537021695] [2022-03-19 23:20:18,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:18,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 23:20:18,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:18,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 23:20:18,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-19 23:20:18,521 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:18,977 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2022-03-19 23:20:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 23:20:18,978 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-03-19 23:20:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:18,978 INFO L225 Difference]: With dead ends: 136 [2022-03-19 23:20:18,978 INFO L226 Difference]: Without dead ends: 122 [2022-03-19 23:20:18,979 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 23:20:18,979 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 152 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:18,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 101 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:20:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-19 23:20:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2022-03-19 23:20:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.247191011235955) internal successors, (111), 99 states have internal predecessors, (111), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-19 23:20:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 138 transitions. [2022-03-19 23:20:18,988 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 138 transitions. Word has length 40 [2022-03-19 23:20:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:18,988 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 138 transitions. [2022-03-19 23:20:18,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 138 transitions. [2022-03-19 23:20:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 23:20:18,989 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:18,989 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:19,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 23:20:19,189 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:19,189 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:19,190 INFO L85 PathProgramCache]: Analyzing trace with hash -306897140, now seen corresponding path program 10 times [2022-03-19 23:20:19,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:19,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855663824] [2022-03-19 23:20:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:19,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:19,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:19,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:19,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:20:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:19,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:19,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855663824] [2022-03-19 23:20:19,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855663824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:19,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056157941] [2022-03-19 23:20:19,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:20:19,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:19,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:19,315 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:19,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 23:20:19,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:20:19,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:19,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:20:19,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:19,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:19,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056157941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:19,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:19,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-03-19 23:20:19,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524008954] [2022-03-19 23:20:19,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:19,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 23:20:19,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:19,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 23:20:19,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-19 23:20:19,860 INFO L87 Difference]: Start difference. First operand 113 states and 138 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:20,425 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2022-03-19 23:20:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 23:20:20,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-03-19 23:20:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:20,426 INFO L225 Difference]: With dead ends: 128 [2022-03-19 23:20:20,426 INFO L226 Difference]: Without dead ends: 116 [2022-03-19 23:20:20,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 23:20:20,427 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:20,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 135 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:20:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-19 23:20:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-03-19 23:20:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 100 states have internal predecessors, (112), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-19 23:20:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-03-19 23:20:20,435 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 40 [2022-03-19 23:20:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:20,436 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-03-19 23:20:20,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-03-19 23:20:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 23:20:20,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:20,436 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:20,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-19 23:20:20,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:20,651 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:20,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:20,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1295907854, now seen corresponding path program 11 times [2022-03-19 23:20:20,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:20,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650010492] [2022-03-19 23:20:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:20,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:20,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:20,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:20,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 23:20:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:20,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:20,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650010492] [2022-03-19 23:20:20,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650010492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:20,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119118629] [2022-03-19 23:20:20,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:20:20,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:20,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:20,699 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:20,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 23:20:20,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:20:20,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:20,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 23:20:20,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:20,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:20,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119118629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:20,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:20,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-03-19 23:20:20,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791734997] [2022-03-19 23:20:20,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:20,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:20:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:20:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:20:20,849 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:20,947 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2022-03-19 23:20:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:20:20,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-03-19 23:20:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:20,948 INFO L225 Difference]: With dead ends: 170 [2022-03-19 23:20:20,948 INFO L226 Difference]: Without dead ends: 105 [2022-03-19 23:20:20,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:20:20,949 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:20,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 53 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:20:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-19 23:20:20,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2022-03-19 23:20:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 85 states have internal predecessors, (97), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-03-19 23:20:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-03-19 23:20:20,956 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 40 [2022-03-19 23:20:20,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:20,956 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-03-19 23:20:20,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-03-19 23:20:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 23:20:20,957 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:20,957 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:20,973 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 23:20:21,173 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,SelfDestructingSolverStorable20 [2022-03-19 23:20:21,174 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:21,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1335621997, now seen corresponding path program 12 times [2022-03-19 23:20:21,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:21,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5585406] [2022-03-19 23:20:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:21,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:21,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:21,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:21,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:20:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:21,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:21,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5585406] [2022-03-19 23:20:21,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5585406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:21,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482637342] [2022-03-19 23:20:21,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:20:21,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:21,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:21,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:21,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 23:20:21,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-19 23:20:21,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:21,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 23:20:21,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:21,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:21,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482637342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:21,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:21,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-03-19 23:20:21,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428092846] [2022-03-19 23:20:21,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:21,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:20:21,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:21,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:20:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:20:21,444 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:21,522 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-03-19 23:20:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:20:21,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-03-19 23:20:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:21,524 INFO L225 Difference]: With dead ends: 115 [2022-03-19 23:20:21,524 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 23:20:21,524 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:20:21,525 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:21,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 46 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:20:21,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 23:20:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-19 23:20:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 88 states have internal predecessors, (100), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-03-19 23:20:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-03-19 23:20:21,532 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 40 [2022-03-19 23:20:21,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:21,532 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-03-19 23:20:21,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:21,532 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-03-19 23:20:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 23:20:21,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:21,533 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:21,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:21,743 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,SelfDestructingSolverStorable21 [2022-03-19 23:20:21,743 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:21,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1943349171, now seen corresponding path program 13 times [2022-03-19 23:20:21,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:21,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233503800] [2022-03-19 23:20:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:21,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:21,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:21,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:21,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:20:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:22,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:22,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233503800] [2022-03-19 23:20:22,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233503800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:22,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038107917] [2022-03-19 23:20:22,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:20:22,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:22,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:22,036 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:22,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 23:20:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 23:20:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:22,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:22,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038107917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:22,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:22,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 29 [2022-03-19 23:20:22,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529817901] [2022-03-19 23:20:22,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:22,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 23:20:22,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 23:20:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2022-03-19 23:20:22,526 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:23,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:23,289 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2022-03-19 23:20:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 23:20:23,289 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-03-19 23:20:23,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:23,290 INFO L225 Difference]: With dead ends: 140 [2022-03-19 23:20:23,291 INFO L226 Difference]: Without dead ends: 134 [2022-03-19 23:20:23,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=2269, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 23:20:23,293 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 105 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:23,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 166 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:20:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-19 23:20:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2022-03-19 23:20:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 103 states have internal predecessors, (115), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-19 23:20:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2022-03-19 23:20:23,304 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 41 [2022-03-19 23:20:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:23,304 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2022-03-19 23:20:23,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2022-03-19 23:20:23,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 23:20:23,305 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:23,305 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:23,321 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 23:20:23,519 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,SelfDestructingSolverStorable22 [2022-03-19 23:20:23,520 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:23,520 INFO L85 PathProgramCache]: Analyzing trace with hash -196254195, now seen corresponding path program 14 times [2022-03-19 23:20:23,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:23,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815736352] [2022-03-19 23:20:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:23,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:23,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:23,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:23,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:20:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:23,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:23,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815736352] [2022-03-19 23:20:23,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815736352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:23,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129315254] [2022-03-19 23:20:23,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:20:23,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:23,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:23,786 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:23,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 23:20:23,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:20:23,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:23,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 23:20:23,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:24,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:24,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129315254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:24,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:24,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 29 [2022-03-19 23:20:24,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267600055] [2022-03-19 23:20:24,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:24,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 23:20:24,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 23:20:24,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2022-03-19 23:20:24,402 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:24,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:24,948 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2022-03-19 23:20:24,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 23:20:24,949 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-03-19 23:20:24,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:24,949 INFO L225 Difference]: With dead ends: 134 [2022-03-19 23:20:24,950 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 23:20:24,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=2073, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 23:20:24,951 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:24,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 138 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:20:24,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 23:20:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-03-19 23:20:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 112 states have internal predecessors, (124), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-19 23:20:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-03-19 23:20:24,960 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 41 [2022-03-19 23:20:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:24,960 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-03-19 23:20:24,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:24,961 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-03-19 23:20:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 23:20:24,961 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:24,961 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:24,978 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 23:20:25,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:25,178 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:25,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:25,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1133754580, now seen corresponding path program 15 times [2022-03-19 23:20:25,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:25,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508513161] [2022-03-19 23:20:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:25,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:25,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:25,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:25,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:20:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:25,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:25,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508513161] [2022-03-19 23:20:25,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508513161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:25,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442043403] [2022-03-19 23:20:25,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:20:25,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:25,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:25,349 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:25,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 23:20:25,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 23:20:25,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 23:20:25,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:25,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:25,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442043403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:25,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:25,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-19 23:20:25,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747578585] [2022-03-19 23:20:25,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:25,966 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 23:20:25,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:25,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 23:20:25,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:20:25,967 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:26,513 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2022-03-19 23:20:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 23:20:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-19 23:20:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:26,515 INFO L225 Difference]: With dead ends: 152 [2022-03-19 23:20:26,515 INFO L226 Difference]: Without dead ends: 138 [2022-03-19 23:20:26,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 23:20:26,516 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 264 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:26,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 121 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:20:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-19 23:20:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2022-03-19 23:20:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 115 states have internal predecessors, (129), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-19 23:20:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2022-03-19 23:20:26,527 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 42 [2022-03-19 23:20:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:26,527 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2022-03-19 23:20:26,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2022-03-19 23:20:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 23:20:26,528 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:26,528 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:26,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-19 23:20:26,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:26,747 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1181369487, now seen corresponding path program 16 times [2022-03-19 23:20:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:26,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035301140] [2022-03-19 23:20:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:26,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:26,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:26,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:26,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 23:20:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:26,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:26,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035301140] [2022-03-19 23:20:26,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035301140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:26,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750141415] [2022-03-19 23:20:26,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:20:26,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:26,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:26,896 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:26,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 23:20:26,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:20:26,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:26,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 23:20:26,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:27,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:27,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750141415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:27,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:27,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-19 23:20:27,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608195336] [2022-03-19 23:20:27,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:27,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 23:20:27,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:27,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 23:20:27,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:20:27,507 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:28,278 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2022-03-19 23:20:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 23:20:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-19 23:20:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:28,280 INFO L225 Difference]: With dead ends: 144 [2022-03-19 23:20:28,280 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 23:20:28,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 23:20:28,281 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 272 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:28,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 130 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:20:28,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 23:20:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-19 23:20:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 116 states have internal predecessors, (130), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-03-19 23:20:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2022-03-19 23:20:28,294 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 42 [2022-03-19 23:20:28,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:28,294 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2022-03-19 23:20:28,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2022-03-19 23:20:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 23:20:28,295 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:28,295 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:28,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:28,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 23:20:28,511 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:28,512 INFO L85 PathProgramCache]: Analyzing trace with hash -439775891, now seen corresponding path program 17 times [2022-03-19 23:20:28,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:28,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430457220] [2022-03-19 23:20:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:28,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:28,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:28,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:28,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:20:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:28,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:28,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430457220] [2022-03-19 23:20:28,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430457220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:28,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115375509] [2022-03-19 23:20:28,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:20:28,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:28,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:28,560 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:28,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 23:20:28,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-19 23:20:28,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:28,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:20:28,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:28,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:28,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115375509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:28,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:28,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-03-19 23:20:28,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695862586] [2022-03-19 23:20:28,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:28,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 23:20:28,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:28,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 23:20:28,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:20:28,751 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:28,900 INFO L93 Difference]: Finished difference Result 186 states and 223 transitions. [2022-03-19 23:20:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 23:20:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-03-19 23:20:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:28,901 INFO L225 Difference]: With dead ends: 186 [2022-03-19 23:20:28,901 INFO L226 Difference]: Without dead ends: 164 [2022-03-19 23:20:28,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-03-19 23:20:28,902 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:28,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 53 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:20:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-19 23:20:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2022-03-19 23:20:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 128 states have (on average 1.2265625) internal successors, (157), 138 states have internal predecessors, (157), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-03-19 23:20:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2022-03-19 23:20:28,917 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 42 [2022-03-19 23:20:28,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:28,917 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2022-03-19 23:20:28,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:28,917 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2022-03-19 23:20:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 23:20:28,918 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:28,918 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:28,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:29,134 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 23:20:29,143 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash -466729134, now seen corresponding path program 18 times [2022-03-19 23:20:29,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:29,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673079287] [2022-03-19 23:20:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:29,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:29,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:29,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:29,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 23:20:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:29,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:29,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673079287] [2022-03-19 23:20:29,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673079287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:29,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41859921] [2022-03-19 23:20:29,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:20:29,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:29,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:29,194 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:29,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 23:20:29,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 23:20:29,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:29,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:20:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:29,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:20:29,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41859921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:29,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:29,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-03-19 23:20:29,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566983627] [2022-03-19 23:20:29,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:29,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 23:20:29,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:29,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 23:20:29,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:20:29,402 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:29,562 INFO L93 Difference]: Finished difference Result 290 states and 347 transitions. [2022-03-19 23:20:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 23:20:29,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2022-03-19 23:20:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:29,563 INFO L225 Difference]: With dead ends: 290 [2022-03-19 23:20:29,563 INFO L226 Difference]: Without dead ends: 186 [2022-03-19 23:20:29,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-03-19 23:20:29,564 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:29,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 53 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:20:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-19 23:20:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2022-03-19 23:20:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 160 states have internal predecessors, (184), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-03-19 23:20:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2022-03-19 23:20:29,581 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 42 [2022-03-19 23:20:29,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:29,582 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2022-03-19 23:20:29,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:29,582 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2022-03-19 23:20:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 23:20:29,582 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:29,583 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:29,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:29,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 23:20:29,796 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1243243306, now seen corresponding path program 19 times [2022-03-19 23:20:29,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:29,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690340093] [2022-03-19 23:20:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:29,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:29,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:29,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:29,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 23:20:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:30,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:30,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690340093] [2022-03-19 23:20:30,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690340093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:30,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272995246] [2022-03-19 23:20:30,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:20:30,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:30,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:30,097 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:30,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 23:20:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:30,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 23:20:30,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:30,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:30,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272995246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:30,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:30,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 31 [2022-03-19 23:20:30,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432645173] [2022-03-19 23:20:30,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:30,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 23:20:30,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:30,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 23:20:30,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:20:30,579 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:31,490 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-03-19 23:20:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 23:20:31,490 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-03-19 23:20:31,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:31,491 INFO L225 Difference]: With dead ends: 224 [2022-03-19 23:20:31,491 INFO L226 Difference]: Without dead ends: 218 [2022-03-19 23:20:31,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=2669, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 23:20:31,493 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 130 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:31,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 180 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:20:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-19 23:20:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 190. [2022-03-19 23:20:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 163 states have (on average 1.2208588957055215) internal successors, (199), 175 states have internal predecessors, (199), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2022-03-19 23:20:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 227 transitions. [2022-03-19 23:20:31,512 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 227 transitions. Word has length 43 [2022-03-19 23:20:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:31,512 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 227 transitions. [2022-03-19 23:20:31,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 227 transitions. [2022-03-19 23:20:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 23:20:31,513 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:31,513 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:31,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:31,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 23:20:31,727 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:31,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1453763067, now seen corresponding path program 20 times [2022-03-19 23:20:31,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:31,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868500254] [2022-03-19 23:20:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:31,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:31,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:31,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:31,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:20:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 23:20:31,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:31,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868500254] [2022-03-19 23:20:31,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868500254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:31,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395198824] [2022-03-19 23:20:31,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:20:31,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:31,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:31,905 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:31,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 23:20:31,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:20:31,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:31,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:20:31,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:20:32,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:20:32,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395198824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:32,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:32,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-03-19 23:20:32,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130739228] [2022-03-19 23:20:32,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:32,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 23:20:32,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 23:20:32,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-19 23:20:32,405 INFO L87 Difference]: Start difference. First operand 190 states and 227 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:32,941 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2022-03-19 23:20:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 23:20:32,941 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-19 23:20:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:32,942 INFO L225 Difference]: With dead ends: 230 [2022-03-19 23:20:32,942 INFO L226 Difference]: Without dead ends: 215 [2022-03-19 23:20:32,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:20:32,944 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 176 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:32,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 114 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:20:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-19 23:20:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-03-19 23:20:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 174 states have (on average 1.2011494252873562) internal successors, (209), 192 states have internal predecessors, (209), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-03-19 23:20:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2022-03-19 23:20:32,964 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 43 [2022-03-19 23:20:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:32,964 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2022-03-19 23:20:32,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2022-03-19 23:20:32,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 23:20:32,966 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:32,966 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:32,982 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 23:20:33,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:33,173 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:33,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1804610186, now seen corresponding path program 21 times [2022-03-19 23:20:33,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:33,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307047019] [2022-03-19 23:20:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:33,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:33,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:33,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 23:20:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:33,467 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 23:20:33,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:33,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307047019] [2022-03-19 23:20:33,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307047019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:33,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492144128] [2022-03-19 23:20:33,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:20:33,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:33,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:33,469 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:33,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 23:20:33,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-19 23:20:33,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:33,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 23:20:33,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:33,864 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 23:20:33,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:34,021 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 23:20:34,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492144128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:34,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:34,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 31 [2022-03-19 23:20:34,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825881935] [2022-03-19 23:20:34,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:34,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 23:20:34,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:34,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 23:20:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:20:34,022 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:34,721 INFO L93 Difference]: Finished difference Result 228 states and 271 transitions. [2022-03-19 23:20:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 23:20:34,721 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-03-19 23:20:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:34,722 INFO L225 Difference]: With dead ends: 228 [2022-03-19 23:20:34,722 INFO L226 Difference]: Without dead ends: 213 [2022-03-19 23:20:34,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=2457, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 23:20:34,724 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:34,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 153 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:20:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-19 23:20:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2022-03-19 23:20:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 190 states have internal predecessors, (208), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-03-19 23:20:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 248 transitions. [2022-03-19 23:20:34,748 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 248 transitions. Word has length 43 [2022-03-19 23:20:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:34,748 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 248 transitions. [2022-03-19 23:20:34,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 248 transitions. [2022-03-19 23:20:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 23:20:34,750 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:34,750 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:34,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:34,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:34,960 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2095538945, now seen corresponding path program 22 times [2022-03-19 23:20:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:34,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465831316] [2022-03-19 23:20:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:34,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:34,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:34,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:35,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:20:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 23:20:35,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:35,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465831316] [2022-03-19 23:20:35,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465831316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:35,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794840007] [2022-03-19 23:20:35,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:20:35,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:35,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:35,130 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 23:20:35,151 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 23:20:35,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:20:35,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:35,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:20:35,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:20:35,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:20:35,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794840007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:35,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:35,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2022-03-19 23:20:35,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336772255] [2022-03-19 23:20:35,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:35,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 23:20:35,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:35,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 23:20:35,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-19 23:20:35,647 INFO L87 Difference]: Start difference. First operand 208 states and 248 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:36,084 INFO L93 Difference]: Finished difference Result 222 states and 261 transitions. [2022-03-19 23:20:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 23:20:36,084 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-19 23:20:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:36,085 INFO L225 Difference]: With dead ends: 222 [2022-03-19 23:20:36,085 INFO L226 Difference]: Without dead ends: 202 [2022-03-19 23:20:36,087 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:20:36,088 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 221 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:36,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 100 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:20:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-19 23:20:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-03-19 23:20:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 164 states have (on average 1.2073170731707317) internal successors, (198), 182 states have internal predecessors, (198), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-03-19 23:20:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 236 transitions. [2022-03-19 23:20:36,111 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 236 transitions. Word has length 43 [2022-03-19 23:20:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:36,111 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 236 transitions. [2022-03-19 23:20:36,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:36,112 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 236 transitions. [2022-03-19 23:20:36,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 23:20:36,113 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:36,113 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:36,149 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 23:20:36,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:36,330 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:36,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1133635601, now seen corresponding path program 23 times [2022-03-19 23:20:36,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:36,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571000725] [2022-03-19 23:20:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:36,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:36,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:36,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:36,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 23:20:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:36,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571000725] [2022-03-19 23:20:36,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571000725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684628047] [2022-03-19 23:20:36,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:20:36,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:36,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:36,600 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 23:20:36,625 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 23:20:36,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-19 23:20:36,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:36,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 23:20:36,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:37,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:37,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684628047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:37,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:37,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-03-19 23:20:37,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569992695] [2022-03-19 23:20:37,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:37,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 23:20:37,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:37,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 23:20:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 23:20:37,493 INFO L87 Difference]: Start difference. First operand 200 states and 236 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:38,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:38,721 INFO L93 Difference]: Finished difference Result 244 states and 289 transitions. [2022-03-19 23:20:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:20:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-03-19 23:20:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:38,723 INFO L225 Difference]: With dead ends: 244 [2022-03-19 23:20:38,723 INFO L226 Difference]: Without dead ends: 230 [2022-03-19 23:20:38,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:20:38,725 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 338 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:38,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 176 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 23:20:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-19 23:20:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2022-03-19 23:20:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 202 states have internal predecessors, (220), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2022-03-19 23:20:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2022-03-19 23:20:38,748 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 44 [2022-03-19 23:20:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:38,749 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2022-03-19 23:20:38,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2022-03-19 23:20:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 23:20:38,750 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:38,750 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:38,766 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 23:20:38,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:38,963 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:38,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1915733740, now seen corresponding path program 24 times [2022-03-19 23:20:38,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:38,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022251010] [2022-03-19 23:20:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:38,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:38,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:38,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:39,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:20:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:39,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:39,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022251010] [2022-03-19 23:20:39,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022251010] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:39,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494380982] [2022-03-19 23:20:39,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:20:39,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:39,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:39,163 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 23:20:39,202 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 23:20:39,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 23:20:39,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 23:20:39,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:39,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:39,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494380982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:39,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:39,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-03-19 23:20:39,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409569602] [2022-03-19 23:20:39,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:39,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 23:20:39,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 23:20:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 23:20:39,970 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:41,122 INFO L93 Difference]: Finished difference Result 236 states and 277 transitions. [2022-03-19 23:20:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:20:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-03-19 23:20:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:41,123 INFO L225 Difference]: With dead ends: 236 [2022-03-19 23:20:41,123 INFO L226 Difference]: Without dead ends: 224 [2022-03-19 23:20:41,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:20:41,125 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 397 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:41,125 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 155 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:20:41,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-19 23:20:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2022-03-19 23:20:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 183 states have (on average 1.2076502732240437) internal successors, (221), 203 states have internal predecessors, (221), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2022-03-19 23:20:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2022-03-19 23:20:41,164 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 44 [2022-03-19 23:20:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:41,165 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2022-03-19 23:20:41,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2022-03-19 23:20:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 23:20:41,166 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:41,166 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:41,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:41,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:41,382 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:41,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1794700818, now seen corresponding path program 25 times [2022-03-19 23:20:41,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:41,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822691418] [2022-03-19 23:20:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:41,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:41,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:41,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:41,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 23:20:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:41,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:41,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822691418] [2022-03-19 23:20:41,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822691418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:41,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700351111] [2022-03-19 23:20:41,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:20:41,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:41,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:41,435 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 23:20:41,464 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 23:20:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:41,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 23:20:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:41,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:41,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700351111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:41,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:41,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-03-19 23:20:41,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648409173] [2022-03-19 23:20:41,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:41,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 23:20:41,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 23:20:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-19 23:20:41,608 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:41,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:41,729 INFO L93 Difference]: Finished difference Result 339 states and 391 transitions. [2022-03-19 23:20:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 23:20:41,730 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2022-03-19 23:20:41,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:41,731 INFO L225 Difference]: With dead ends: 339 [2022-03-19 23:20:41,731 INFO L226 Difference]: Without dead ends: 215 [2022-03-19 23:20:41,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2022-03-19 23:20:41,732 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:41,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 62 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:20:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-19 23:20:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2022-03-19 23:20:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 174 states have (on average 1.1954022988505748) internal successors, (208), 190 states have internal predecessors, (208), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-03-19 23:20:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 240 transitions. [2022-03-19 23:20:41,765 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 240 transitions. Word has length 44 [2022-03-19 23:20:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:41,766 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 240 transitions. [2022-03-19 23:20:41,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 240 transitions. [2022-03-19 23:20:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 23:20:41,767 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:41,767 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:41,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:41,979 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,SelfDestructingSolverStorable34 [2022-03-19 23:20:41,979 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:41,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:41,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1255089933, now seen corresponding path program 26 times [2022-03-19 23:20:41,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:41,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121764849] [2022-03-19 23:20:41,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:41,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:41,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:41,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:42,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:20:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:42,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121764849] [2022-03-19 23:20:42,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121764849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652224840] [2022-03-19 23:20:42,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:20:42,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:42,031 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 23:20:42,032 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 23:20:42,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:20:42,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:42,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 23:20:42,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:42,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:42,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652224840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:42,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:42,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-03-19 23:20:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041646854] [2022-03-19 23:20:42,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:42,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 23:20:42,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:42,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 23:20:42,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-19 23:20:42,190 INFO L87 Difference]: Start difference. First operand 207 states and 240 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:42,321 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2022-03-19 23:20:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 23:20:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-03-19 23:20:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:42,322 INFO L225 Difference]: With dead ends: 233 [2022-03-19 23:20:42,322 INFO L226 Difference]: Without dead ends: 212 [2022-03-19 23:20:42,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2022-03-19 23:20:42,323 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:42,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 68 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:20:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-19 23:20:42,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-19 23:20:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-03-19 23:20:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 245 transitions. [2022-03-19 23:20:42,354 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 245 transitions. Word has length 44 [2022-03-19 23:20:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:42,354 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 245 transitions. [2022-03-19 23:20:42,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 245 transitions. [2022-03-19 23:20:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 23:20:42,355 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:42,355 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:42,372 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 23:20:42,571 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,SelfDestructingSolverStorable35 [2022-03-19 23:20:42,572 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:42,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1761268627, now seen corresponding path program 27 times [2022-03-19 23:20:42,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:42,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322097107] [2022-03-19 23:20:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:42,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:42,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:42,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:42,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:20:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:42,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:42,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322097107] [2022-03-19 23:20:42,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322097107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:42,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369585876] [2022-03-19 23:20:42,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:20:42,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:42,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:42,921 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 23:20:42,923 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 23:20:42,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:20:42,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:42,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 23:20:42,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:43,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:43,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369585876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:43,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:43,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 33 [2022-03-19 23:20:43,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393811751] [2022-03-19 23:20:43,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:43,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 23:20:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:43,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 23:20:43,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 23:20:43,441 INFO L87 Difference]: Start difference. First operand 212 states and 245 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:44,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:44,665 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2022-03-19 23:20:44,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 23:20:44,665 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-03-19 23:20:44,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:44,666 INFO L225 Difference]: With dead ends: 270 [2022-03-19 23:20:44,666 INFO L226 Difference]: Without dead ends: 264 [2022-03-19 23:20:44,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=3101, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 23:20:44,668 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 150 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2653 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:44,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 201 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2653 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:20:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-19 23:20:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 228. [2022-03-19 23:20:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 192 states have (on average 1.1875) internal successors, (228), 210 states have internal predecessors, (228), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2022-03-19 23:20:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 264 transitions. [2022-03-19 23:20:44,698 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 264 transitions. Word has length 45 [2022-03-19 23:20:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:44,698 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 264 transitions. [2022-03-19 23:20:44,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 264 transitions. [2022-03-19 23:20:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 23:20:44,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:44,699 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:44,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:44,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-19 23:20:44,916 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:44,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1247111507, now seen corresponding path program 28 times [2022-03-19 23:20:44,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:44,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097108029] [2022-03-19 23:20:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:44,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:44,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:44,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:45,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:20:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:45,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097108029] [2022-03-19 23:20:45,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097108029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948416853] [2022-03-19 23:20:45,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:20:45,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:45,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:45,219 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:45,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 23:20:45,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:20:45,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:45,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 23:20:45,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:45,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:45,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948416853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:45,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:45,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 33 [2022-03-19 23:20:45,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801283235] [2022-03-19 23:20:45,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:45,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 23:20:45,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:45,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 23:20:45,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 23:20:45,836 INFO L87 Difference]: Start difference. First operand 228 states and 264 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:46,764 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2022-03-19 23:20:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 23:20:46,765 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-03-19 23:20:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:46,766 INFO L225 Difference]: With dead ends: 234 [2022-03-19 23:20:46,766 INFO L226 Difference]: Without dead ends: 212 [2022-03-19 23:20:46,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=2873, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 23:20:46,767 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 96 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:46,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 176 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:20:46,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-19 23:20:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-19 23:20:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2022-03-19 23:20:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 246 transitions. [2022-03-19 23:20:46,792 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 246 transitions. Word has length 45 [2022-03-19 23:20:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:46,792 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 246 transitions. [2022-03-19 23:20:46,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 246 transitions. [2022-03-19 23:20:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 23:20:46,793 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:46,793 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:46,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:47,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:47,010 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:47,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1602219117, now seen corresponding path program 29 times [2022-03-19 23:20:47,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:47,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263065473] [2022-03-19 23:20:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:47,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:47,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:47,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:47,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:20:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:20:47,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:47,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263065473] [2022-03-19 23:20:47,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263065473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:47,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046041011] [2022-03-19 23:20:47,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:20:47,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:47,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:47,275 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:47,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 23:20:47,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-19 23:20:47,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:47,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 23:20:47,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:20:47,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:20:47,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046041011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:47,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:47,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-03-19 23:20:47,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97437223] [2022-03-19 23:20:47,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:47,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 23:20:47,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:47,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 23:20:47,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 23:20:47,822 INFO L87 Difference]: Start difference. First operand 212 states and 246 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:48,316 INFO L93 Difference]: Finished difference Result 230 states and 267 transitions. [2022-03-19 23:20:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 23:20:48,316 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-03-19 23:20:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:48,317 INFO L225 Difference]: With dead ends: 230 [2022-03-19 23:20:48,317 INFO L226 Difference]: Without dead ends: 224 [2022-03-19 23:20:48,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=2653, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 23:20:48,319 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:48,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 163 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:20:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-19 23:20:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2022-03-19 23:20:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 204 states have internal predecessors, (222), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2022-03-19 23:20:48,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2022-03-19 23:20:48,347 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 45 [2022-03-19 23:20:48,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:48,347 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2022-03-19 23:20:48,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:48,347 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2022-03-19 23:20:48,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 23:20:48,348 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:48,348 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:48,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:48,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 23:20:48,564 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:48,564 INFO L85 PathProgramCache]: Analyzing trace with hash 215774988, now seen corresponding path program 30 times [2022-03-19 23:20:48,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:48,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363470039] [2022-03-19 23:20:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:48,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:48,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:48,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:48,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:20:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:48,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:48,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363470039] [2022-03-19 23:20:48,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363470039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:48,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314041959] [2022-03-19 23:20:48,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:20:48,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:48,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:48,808 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:48,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 23:20:48,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 23:20:48,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:48,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 23:20:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:49,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:49,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314041959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:49,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:49,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2022-03-19 23:20:49,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203712569] [2022-03-19 23:20:49,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:49,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 23:20:49,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:49,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 23:20:49,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 23:20:49,773 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:51,351 INFO L93 Difference]: Finished difference Result 268 states and 314 transitions. [2022-03-19 23:20:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 23:20:51,351 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-03-19 23:20:51,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:51,355 INFO L225 Difference]: With dead ends: 268 [2022-03-19 23:20:51,355 INFO L226 Difference]: Without dead ends: 254 [2022-03-19 23:20:51,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=376, Invalid=4046, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 23:20:51,356 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 482 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:51,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 191 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:20:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-19 23:20:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2022-03-19 23:20:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 226 states have internal predecessors, (246), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2022-03-19 23:20:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 287 transitions. [2022-03-19 23:20:51,407 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 287 transitions. Word has length 46 [2022-03-19 23:20:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:51,407 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 287 transitions. [2022-03-19 23:20:51,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 287 transitions. [2022-03-19 23:20:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 23:20:51,409 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:51,409 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:51,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:51,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 23:20:51,625 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:51,626 INFO L85 PathProgramCache]: Analyzing trace with hash 256944047, now seen corresponding path program 31 times [2022-03-19 23:20:51,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:51,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691363727] [2022-03-19 23:20:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:51,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:51,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:51,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:51,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 23:20:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:51,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691363727] [2022-03-19 23:20:51,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691363727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466692305] [2022-03-19 23:20:51,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:20:51,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:51,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:51,848 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:51,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 23:20:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:51,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 23:20:51,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:52,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:20:52,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466692305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:52,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:52,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2022-03-19 23:20:52,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384607093] [2022-03-19 23:20:52,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:52,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 23:20:52,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:52,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 23:20:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 23:20:52,862 INFO L87 Difference]: Start difference. First operand 245 states and 287 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:54,540 INFO L93 Difference]: Finished difference Result 260 states and 302 transitions. [2022-03-19 23:20:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 23:20:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-03-19 23:20:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:54,541 INFO L225 Difference]: With dead ends: 260 [2022-03-19 23:20:54,541 INFO L226 Difference]: Without dead ends: 248 [2022-03-19 23:20:54,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=376, Invalid=4046, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 23:20:54,542 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 493 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:54,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 200 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:20:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-19 23:20:54,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2022-03-19 23:20:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 207 states have (on average 1.1932367149758454) internal successors, (247), 227 states have internal predecessors, (247), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-03-19 23:20:54,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 286 transitions. [2022-03-19 23:20:54,576 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 286 transitions. Word has length 46 [2022-03-19 23:20:54,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:54,576 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 286 transitions. [2022-03-19 23:20:54,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:20:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 286 transitions. [2022-03-19 23:20:54,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 23:20:54,577 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:54,577 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:54,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:54,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:54,791 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash -521678067, now seen corresponding path program 32 times [2022-03-19 23:20:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:54,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184022013] [2022-03-19 23:20:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:54,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:54,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:54,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:54,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:20:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:54,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:54,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184022013] [2022-03-19 23:20:54,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184022013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:54,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201128158] [2022-03-19 23:20:54,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:20:54,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:54,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:54,868 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:54,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 23:20:54,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:20:54,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:54,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:20:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:55,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:55,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201128158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:55,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:55,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-03-19 23:20:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404647584] [2022-03-19 23:20:55,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:55,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 23:20:55,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:55,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 23:20:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:20:55,097 INFO L87 Difference]: Start difference. First operand 246 states and 286 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:55,372 INFO L93 Difference]: Finished difference Result 332 states and 391 transitions. [2022-03-19 23:20:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 23:20:55,372 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-03-19 23:20:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:55,373 INFO L225 Difference]: With dead ends: 332 [2022-03-19 23:20:55,373 INFO L226 Difference]: Without dead ends: 302 [2022-03-19 23:20:55,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2022-03-19 23:20:55,374 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 67 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:55,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 82 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:20:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-19 23:20:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 284. [2022-03-19 23:20:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 245 states have (on average 1.1918367346938776) internal successors, (292), 265 states have internal predecessors, (292), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-03-19 23:20:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 331 transitions. [2022-03-19 23:20:55,419 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 331 transitions. Word has length 46 [2022-03-19 23:20:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:55,420 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 331 transitions. [2022-03-19 23:20:55,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:20:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 331 transitions. [2022-03-19 23:20:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 23:20:55,422 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:55,422 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:55,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:55,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:55,635 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash -467445298, now seen corresponding path program 33 times [2022-03-19 23:20:55,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:55,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676194250] [2022-03-19 23:20:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:55,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:55,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:55,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 23:20:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:55,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:55,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676194250] [2022-03-19 23:20:55,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676194250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:55,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511774363] [2022-03-19 23:20:55,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:20:55,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:55,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:55,691 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:55,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 23:20:55,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 23:20:55,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:55,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:20:55,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:55,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 23:20:55,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511774363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:55,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:55,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-03-19 23:20:55,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477790656] [2022-03-19 23:20:55,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:55,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 23:20:55,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:55,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 23:20:55,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:20:55,913 INFO L87 Difference]: Start difference. First operand 284 states and 331 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:56,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:56,180 INFO L93 Difference]: Finished difference Result 525 states and 613 transitions. [2022-03-19 23:20:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 23:20:56,180 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-03-19 23:20:56,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:56,182 INFO L225 Difference]: With dead ends: 525 [2022-03-19 23:20:56,182 INFO L226 Difference]: Without dead ends: 340 [2022-03-19 23:20:56,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2022-03-19 23:20:56,187 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 107 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:56,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 57 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:20:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-03-19 23:20:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 322. [2022-03-19 23:20:56,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-03-19 23:20:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 376 transitions. [2022-03-19 23:20:56,254 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 376 transitions. Word has length 46 [2022-03-19 23:20:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:56,255 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 376 transitions. [2022-03-19 23:20:56,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 376 transitions. [2022-03-19 23:20:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 23:20:56,257 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:56,257 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:56,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 23:20:56,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-19 23:20:56,473 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1644141558, now seen corresponding path program 34 times [2022-03-19 23:20:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:56,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867077952] [2022-03-19 23:20:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:56,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:56,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:56,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:56,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 23:20:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:56,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867077952] [2022-03-19 23:20:56,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867077952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504339913] [2022-03-19 23:20:56,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:20:56,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:56,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:56,815 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:56,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 23:20:56,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:20:56,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:56,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 23:20:56,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:57,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:20:57,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504339913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:57,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:57,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 35 [2022-03-19 23:20:57,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855186645] [2022-03-19 23:20:57,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:57,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 23:20:57,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:57,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 23:20:57,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1113, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 23:20:57,194 INFO L87 Difference]: Start difference. First operand 322 states and 376 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:20:58,165 INFO L93 Difference]: Finished difference Result 392 states and 457 transitions. [2022-03-19 23:20:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 23:20:58,166 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-03-19 23:20:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:20:58,167 INFO L225 Difference]: With dead ends: 392 [2022-03-19 23:20:58,167 INFO L226 Difference]: Without dead ends: 386 [2022-03-19 23:20:58,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=3565, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 23:20:58,169 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 175 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3231 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 3271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:20:58,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 218 Invalid, 3271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:20:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-03-19 23:20:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 338. [2022-03-19 23:20:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 296 states have (on average 1.1891891891891893) internal successors, (352), 318 states have internal predecessors, (352), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2022-03-19 23:20:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 395 transitions. [2022-03-19 23:20:58,228 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 395 transitions. Word has length 47 [2022-03-19 23:20:58,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:20:58,228 INFO L478 AbstractCegarLoop]: Abstraction has 338 states and 395 transitions. [2022-03-19 23:20:58,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:20:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 395 transitions. [2022-03-19 23:20:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 23:20:58,231 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:20:58,231 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:20:58,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-19 23:20:58,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:58,436 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:20:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:20:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1497239530, now seen corresponding path program 35 times [2022-03-19 23:20:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:20:58,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193273141] [2022-03-19 23:20:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:20:58,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:20:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:58,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:20:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:58,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:20:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:58,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 23:20:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:20:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:58,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:20:58,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193273141] [2022-03-19 23:20:58,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193273141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:20:58,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872125995] [2022-03-19 23:20:58,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:20:58,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:20:58,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:20:58,817 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:20:58,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 23:20:58,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-19 23:20:58,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:20:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 23:20:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:20:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:59,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:20:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:20:59,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872125995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:20:59,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:20:59,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 35 [2022-03-19 23:20:59,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543333938] [2022-03-19 23:20:59,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:20:59,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 23:20:59,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:20:59,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 23:20:59,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 23:20:59,439 INFO L87 Difference]: Start difference. First operand 338 states and 395 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:00,373 INFO L93 Difference]: Finished difference Result 344 states and 400 transitions. [2022-03-19 23:21:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 23:21:00,373 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-03-19 23:21:00,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:00,375 INFO L225 Difference]: With dead ends: 344 [2022-03-19 23:21:00,375 INFO L226 Difference]: Without dead ends: 322 [2022-03-19 23:21:00,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=3321, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 23:21:00,377 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 121 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:00,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 185 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:21:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-19 23:21:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2022-03-19 23:21:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2022-03-19 23:21:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 377 transitions. [2022-03-19 23:21:00,437 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 377 transitions. Word has length 47 [2022-03-19 23:21:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:00,437 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 377 transitions. [2022-03-19 23:21:00,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 377 transitions. [2022-03-19 23:21:00,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 23:21:00,438 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:00,438 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:00,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:00,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 23:21:00,651 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:00,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1271699905, now seen corresponding path program 36 times [2022-03-19 23:21:00,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:00,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589680454] [2022-03-19 23:21:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:00,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:00,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:00,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:00,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:21:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:21:00,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:00,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589680454] [2022-03-19 23:21:00,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589680454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:00,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327323425] [2022-03-19 23:21:00,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:21:00,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:00,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:00,838 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:00,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 23:21:00,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 23:21:00,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:00,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 23:21:00,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 23:21:01,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 23:21:01,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327323425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:01,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:01,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2022-03-19 23:21:01,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49842111] [2022-03-19 23:21:01,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:01,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 23:21:01,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:01,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 23:21:01,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 23:21:01,571 INFO L87 Difference]: Start difference. First operand 322 states and 377 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:02,536 INFO L93 Difference]: Finished difference Result 378 states and 443 transitions. [2022-03-19 23:21:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 23:21:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-19 23:21:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:02,538 INFO L225 Difference]: With dead ends: 378 [2022-03-19 23:21:02,538 INFO L226 Difference]: Without dead ends: 362 [2022-03-19 23:21:02,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 23:21:02,541 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 270 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:02,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 151 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:21:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-19 23:21:02,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2022-03-19 23:21:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 303 states have (on average 1.174917491749175) internal successors, (356), 333 states have internal predecessors, (356), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2022-03-19 23:21:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 416 transitions. [2022-03-19 23:21:02,614 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 416 transitions. Word has length 47 [2022-03-19 23:21:02,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:02,614 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 416 transitions. [2022-03-19 23:21:02,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 416 transitions. [2022-03-19 23:21:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 23:21:02,617 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:02,617 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:02,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:02,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:02,833 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:02,833 INFO L85 PathProgramCache]: Analyzing trace with hash 83484810, now seen corresponding path program 37 times [2022-03-19 23:21:02,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:02,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762384039] [2022-03-19 23:21:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:02,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:02,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:02,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:02,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 23:21:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:21:03,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:03,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762384039] [2022-03-19 23:21:03,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762384039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:03,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396261788] [2022-03-19 23:21:03,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:21:03,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:03,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:03,141 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:03,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 23:21:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:03,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 23:21:03,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:21:03,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:21:03,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396261788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:03,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:03,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 35 [2022-03-19 23:21:03,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090188480] [2022-03-19 23:21:03,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:03,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 23:21:03,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:03,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 23:21:03,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 23:21:03,692 INFO L87 Difference]: Start difference. First operand 357 states and 416 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:04,238 INFO L93 Difference]: Finished difference Result 375 states and 438 transitions. [2022-03-19 23:21:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 23:21:04,239 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-03-19 23:21:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:04,241 INFO L225 Difference]: With dead ends: 375 [2022-03-19 23:21:04,241 INFO L226 Difference]: Without dead ends: 359 [2022-03-19 23:21:04,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=221, Invalid=3085, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 23:21:04,242 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:04,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 158 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:21:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-19 23:21:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 354. [2022-03-19 23:21:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 300 states have (on average 1.18) internal successors, (354), 330 states have internal predecessors, (354), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2022-03-19 23:21:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 414 transitions. [2022-03-19 23:21:04,352 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 414 transitions. Word has length 47 [2022-03-19 23:21:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:04,352 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 414 transitions. [2022-03-19 23:21:04,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 414 transitions. [2022-03-19 23:21:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 23:21:04,355 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:04,355 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:04,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-19 23:21:04,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-19 23:21:04,571 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:04,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1251929861, now seen corresponding path program 38 times [2022-03-19 23:21:04,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:04,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260905056] [2022-03-19 23:21:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:04,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:04,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:04,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:04,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:21:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:21:04,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260905056] [2022-03-19 23:21:04,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260905056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003926991] [2022-03-19 23:21:04,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:21:04,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:04,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:04,774 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:04,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 23:21:04,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:21:04,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:04,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 23:21:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 23:21:04,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 23:21:05,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003926991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:05,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:05,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2022-03-19 23:21:05,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850604856] [2022-03-19 23:21:05,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:05,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 23:21:05,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:05,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 23:21:05,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 23:21:05,205 INFO L87 Difference]: Start difference. First operand 354 states and 414 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:05,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:05,807 INFO L93 Difference]: Finished difference Result 368 states and 427 transitions. [2022-03-19 23:21:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 23:21:05,808 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-19 23:21:05,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:05,809 INFO L225 Difference]: With dead ends: 368 [2022-03-19 23:21:05,809 INFO L226 Difference]: Without dead ends: 346 [2022-03-19 23:21:05,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 23:21:05,813 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 328 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:05,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 137 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:21:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-03-19 23:21:05,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2022-03-19 23:21:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 290 states have (on average 1.1793103448275861) internal successors, (342), 320 states have internal predecessors, (342), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2022-03-19 23:21:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 398 transitions. [2022-03-19 23:21:05,863 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 398 transitions. Word has length 47 [2022-03-19 23:21:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:05,863 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 398 transitions. [2022-03-19 23:21:05,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 398 transitions. [2022-03-19 23:21:05,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 23:21:05,865 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:05,865 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:05,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:06,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-19 23:21:06,082 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:06,083 INFO L85 PathProgramCache]: Analyzing trace with hash -448253169, now seen corresponding path program 39 times [2022-03-19 23:21:06,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:06,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199429077] [2022-03-19 23:21:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:06,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:06,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:06,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:06,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 23:21:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:06,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199429077] [2022-03-19 23:21:06,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199429077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824937417] [2022-03-19 23:21:06,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:21:06,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:06,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:06,390 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:06,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 23:21:06,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 23:21:06,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:06,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 23:21:06,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:06,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:07,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824937417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:07,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:07,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-19 23:21:07,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255121783] [2022-03-19 23:21:07,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:07,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 23:21:07,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:07,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 23:21:07,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 23:21:07,256 INFO L87 Difference]: Start difference. First operand 344 states and 398 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:09,076 INFO L93 Difference]: Finished difference Result 410 states and 477 transitions. [2022-03-19 23:21:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:21:09,076 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-03-19 23:21:09,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:09,078 INFO L225 Difference]: With dead ends: 410 [2022-03-19 23:21:09,078 INFO L226 Difference]: Without dead ends: 396 [2022-03-19 23:21:09,080 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=458, Invalid=5394, Unknown=0, NotChecked=0, Total=5852 [2022-03-19 23:21:09,080 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 600 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3293 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 3374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:09,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 226 Invalid, 3374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3293 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:21:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-19 23:21:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 387. [2022-03-19 23:21:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 327 states have (on average 1.1773700305810397) internal successors, (385), 361 states have internal predecessors, (385), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2022-03-19 23:21:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 449 transitions. [2022-03-19 23:21:09,140 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 449 transitions. Word has length 48 [2022-03-19 23:21:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:09,141 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 449 transitions. [2022-03-19 23:21:09,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 449 transitions. [2022-03-19 23:21:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 23:21:09,143 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:09,143 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:09,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:09,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 23:21:09,361 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash 827987660, now seen corresponding path program 40 times [2022-03-19 23:21:09,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:09,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995256664] [2022-03-19 23:21:09,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:09,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:09,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:09,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:09,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:21:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:09,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:09,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995256664] [2022-03-19 23:21:09,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995256664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:09,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222571408] [2022-03-19 23:21:09,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:21:09,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:09,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:09,661 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:09,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 23:21:09,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:21:09,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:09,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 23:21:09,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:10,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:10,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222571408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:10,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:10,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-19 23:21:10,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848592659] [2022-03-19 23:21:10,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:10,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 23:21:10,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:10,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 23:21:10,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 23:21:10,798 INFO L87 Difference]: Start difference. First operand 387 states and 449 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:12,657 INFO L93 Difference]: Finished difference Result 402 states and 464 transitions. [2022-03-19 23:21:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:21:12,657 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-03-19 23:21:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:12,659 INFO L225 Difference]: With dead ends: 402 [2022-03-19 23:21:12,659 INFO L226 Difference]: Without dead ends: 390 [2022-03-19 23:21:12,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=458, Invalid=5394, Unknown=0, NotChecked=0, Total=5852 [2022-03-19 23:21:12,661 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 691 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2959 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 3028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:12,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 210 Invalid, 3028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2959 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:21:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-19 23:21:12,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2022-03-19 23:21:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 328 states have (on average 1.1768292682926829) internal successors, (386), 362 states have internal predecessors, (386), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-03-19 23:21:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 447 transitions. [2022-03-19 23:21:12,726 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 447 transitions. Word has length 48 [2022-03-19 23:21:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:12,726 INFO L478 AbstractCegarLoop]: Abstraction has 388 states and 447 transitions. [2022-03-19 23:21:12,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 447 transitions. [2022-03-19 23:21:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 23:21:12,729 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:12,729 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:12,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:12,945 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 23:21:12,946 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash 179082418, now seen corresponding path program 41 times [2022-03-19 23:21:12,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:12,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489466209] [2022-03-19 23:21:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:12,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:12,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:12,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:13,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 23:21:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:13,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:13,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489466209] [2022-03-19 23:21:13,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489466209] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:13,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665519625] [2022-03-19 23:21:13,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:21:13,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:13,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:13,015 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:13,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 23:21:13,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-19 23:21:13,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 23:21:13,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:13,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:13,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665519625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:13,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:13,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2022-03-19 23:21:13,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625054245] [2022-03-19 23:21:13,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:13,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 23:21:13,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 23:21:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:21:13,254 INFO L87 Difference]: Start difference. First operand 388 states and 447 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:13,539 INFO L93 Difference]: Finished difference Result 593 states and 672 transitions. [2022-03-19 23:21:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 23:21:13,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-03-19 23:21:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:13,541 INFO L225 Difference]: With dead ends: 593 [2022-03-19 23:21:13,542 INFO L226 Difference]: Without dead ends: 383 [2022-03-19 23:21:13,544 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:21:13,544 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:13,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 66 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:21:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-03-19 23:21:13,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 375. [2022-03-19 23:21:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 321 states have (on average 1.1682242990654206) internal successors, (375), 351 states have internal predecessors, (375), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2022-03-19 23:21:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 428 transitions. [2022-03-19 23:21:13,607 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 428 transitions. Word has length 48 [2022-03-19 23:21:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:13,607 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 428 transitions. [2022-03-19 23:21:13,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 428 transitions. [2022-03-19 23:21:13,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 23:21:13,609 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:13,609 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:13,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:13,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:13,822 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:13,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2046793773, now seen corresponding path program 42 times [2022-03-19 23:21:13,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:13,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418063742] [2022-03-19 23:21:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:13,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:13,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:13,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:13,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:21:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:13,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418063742] [2022-03-19 23:21:13,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418063742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302719368] [2022-03-19 23:21:13,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:21:13,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:13,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:13,925 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:13,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 23:21:13,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 23:21:13,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:13,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 23:21:13,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:14,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:14,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302719368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:14,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:14,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2022-03-19 23:21:14,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546697512] [2022-03-19 23:21:14,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:14,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 23:21:14,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 23:21:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:21:14,173 INFO L87 Difference]: Start difference. First operand 375 states and 428 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:21:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:14,396 INFO L93 Difference]: Finished difference Result 409 states and 468 transitions. [2022-03-19 23:21:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 23:21:14,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-03-19 23:21:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:14,398 INFO L225 Difference]: With dead ends: 409 [2022-03-19 23:21:14,398 INFO L226 Difference]: Without dead ends: 382 [2022-03-19 23:21:14,399 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:21:14,400 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 84 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:14,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 60 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:21:14,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-19 23:21:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-03-19 23:21:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2022-03-19 23:21:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 435 transitions. [2022-03-19 23:21:14,466 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 435 transitions. Word has length 48 [2022-03-19 23:21:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:14,466 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 435 transitions. [2022-03-19 23:21:14,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:21:14,466 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 435 transitions. [2022-03-19 23:21:14,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 23:21:14,468 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:14,469 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:14,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:14,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:14,685 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:14,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1121658739, now seen corresponding path program 43 times [2022-03-19 23:21:14,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:14,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994322943] [2022-03-19 23:21:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:14,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:14,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:14,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:14,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:21:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:21:15,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:15,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994322943] [2022-03-19 23:21:15,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994322943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:15,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646347513] [2022-03-19 23:21:15,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:21:15,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:15,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:15,056 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:15,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 23:21:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:15,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 23:21:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:21:15,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:21:15,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646347513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:15,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:15,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 37 [2022-03-19 23:21:15,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098424090] [2022-03-19 23:21:15,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:15,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 23:21:15,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 23:21:15,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 23:21:15,495 INFO L87 Difference]: Start difference. First operand 382 states and 435 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:17,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:17,024 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-03-19 23:21:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 23:21:17,024 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-03-19 23:21:17,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:17,027 INFO L225 Difference]: With dead ends: 460 [2022-03-19 23:21:17,027 INFO L226 Difference]: Without dead ends: 454 [2022-03-19 23:21:17,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=229, Invalid=4061, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 23:21:17,030 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 195 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 4009 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 4009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:17,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 241 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 4009 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:21:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-03-19 23:21:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 398. [2022-03-19 23:21:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 341 states have (on average 1.1642228739002933) internal successors, (397), 373 states have internal predecessors, (397), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2022-03-19 23:21:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 454 transitions. [2022-03-19 23:21:17,111 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 454 transitions. Word has length 49 [2022-03-19 23:21:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:17,111 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 454 transitions. [2022-03-19 23:21:17,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 454 transitions. [2022-03-19 23:21:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 23:21:17,114 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:17,114 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:17,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-19 23:21:17,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-19 23:21:17,332 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:17,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:17,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1142562995, now seen corresponding path program 44 times [2022-03-19 23:21:17,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:17,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397738024] [2022-03-19 23:21:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:17,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:17,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:17,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:17,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:21:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:21:17,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:17,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397738024] [2022-03-19 23:21:17,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397738024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:17,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712301022] [2022-03-19 23:21:17,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:21:17,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:17,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:17,741 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:17,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 23:21:17,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:21:17,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:17,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 23:21:17,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:21:18,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:21:18,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712301022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:18,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:18,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 37 [2022-03-19 23:21:18,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793228074] [2022-03-19 23:21:18,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:18,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 23:21:18,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:18,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 23:21:18,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 23:21:18,433 INFO L87 Difference]: Start difference. First operand 398 states and 454 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:19,908 INFO L93 Difference]: Finished difference Result 404 states and 459 transitions. [2022-03-19 23:21:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 23:21:19,909 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-03-19 23:21:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:19,910 INFO L225 Difference]: With dead ends: 404 [2022-03-19 23:21:19,910 INFO L226 Difference]: Without dead ends: 382 [2022-03-19 23:21:19,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=231, Invalid=3801, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 23:21:19,912 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 135 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3203 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:19,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 221 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3203 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 23:21:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-19 23:21:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-03-19 23:21:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2022-03-19 23:21:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 436 transitions. [2022-03-19 23:21:19,981 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 436 transitions. Word has length 49 [2022-03-19 23:21:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:19,982 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 436 transitions. [2022-03-19 23:21:19,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 436 transitions. [2022-03-19 23:21:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 23:21:19,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:19,984 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:20,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:20,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:20,200 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash 690493581, now seen corresponding path program 45 times [2022-03-19 23:21:20,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:20,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731708155] [2022-03-19 23:21:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:20,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:20,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:20,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:20,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:21:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:21:20,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:20,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731708155] [2022-03-19 23:21:20,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731708155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:20,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387775770] [2022-03-19 23:21:20,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:21:20,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:20,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:20,538 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:20,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 23:21:20,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 23:21:20,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:20,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 23:21:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:21:21,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:21:21,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387775770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:21,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:21,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 37 [2022-03-19 23:21:21,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781761872] [2022-03-19 23:21:21,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:21,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 23:21:21,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:21,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 23:21:21,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 23:21:21,303 INFO L87 Difference]: Start difference. First operand 382 states and 436 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:22,111 INFO L93 Difference]: Finished difference Result 388 states and 441 transitions. [2022-03-19 23:21:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 23:21:22,111 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-03-19 23:21:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:22,112 INFO L225 Difference]: With dead ends: 388 [2022-03-19 23:21:22,112 INFO L226 Difference]: Without dead ends: 364 [2022-03-19 23:21:22,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=3549, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 23:21:22,114 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:22,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 191 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:21:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-19 23:21:22,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-03-19 23:21:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 313 states have (on average 1.1661341853035143) internal successors, (365), 341 states have internal predecessors, (365), 19 states have call successors, (19), 5 states have call predecessors, (19), 31 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2022-03-19 23:21:22,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 416 transitions. [2022-03-19 23:21:22,196 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 416 transitions. Word has length 49 [2022-03-19 23:21:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:22,196 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 416 transitions. [2022-03-19 23:21:22,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:22,196 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 416 transitions. [2022-03-19 23:21:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 23:21:22,198 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:22,198 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:22,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:22,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-19 23:21:22,411 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:22,412 INFO L85 PathProgramCache]: Analyzing trace with hash 375234381, now seen corresponding path program 46 times [2022-03-19 23:21:22,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:22,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158376139] [2022-03-19 23:21:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:22,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:22,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:22,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:22,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:21:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:21:22,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:22,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158376139] [2022-03-19 23:21:22,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158376139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:22,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864052038] [2022-03-19 23:21:22,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:21:22,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:22,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:22,682 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:22,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 23:21:22,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:21:22,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:22,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 23:21:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:21:23,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:21:23,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864052038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:23,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:23,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 37 [2022-03-19 23:21:23,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704492675] [2022-03-19 23:21:23,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:23,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 23:21:23,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:23,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 23:21:23,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 23:21:23,393 INFO L87 Difference]: Start difference. First operand 364 states and 416 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:23,942 INFO L93 Difference]: Finished difference Result 382 states and 437 transitions. [2022-03-19 23:21:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 23:21:23,943 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-03-19 23:21:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:23,944 INFO L225 Difference]: With dead ends: 382 [2022-03-19 23:21:23,944 INFO L226 Difference]: Without dead ends: 376 [2022-03-19 23:21:23,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 23:21:23,947 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:23,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 153 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:21:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-19 23:21:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 374. [2022-03-19 23:21:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 320 states have (on average 1.16875) internal successors, (374), 350 states have internal predecessors, (374), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2022-03-19 23:21:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 429 transitions. [2022-03-19 23:21:24,021 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 429 transitions. Word has length 49 [2022-03-19 23:21:24,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:24,021 INFO L478 AbstractCegarLoop]: Abstraction has 374 states and 429 transitions. [2022-03-19 23:21:24,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:24,021 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 429 transitions. [2022-03-19 23:21:24,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 23:21:24,027 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:24,027 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:24,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:24,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:24,244 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:24,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:24,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1431154964, now seen corresponding path program 47 times [2022-03-19 23:21:24,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:24,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803576138] [2022-03-19 23:21:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:24,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:24,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:24,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:21:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:24,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:24,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803576138] [2022-03-19 23:21:24,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803576138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:24,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293587363] [2022-03-19 23:21:24,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:21:24,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:24,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:24,545 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:24,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 23:21:24,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:21:24,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:24,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 23:21:24,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:25,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:25,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293587363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:25,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:25,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2022-03-19 23:21:25,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452902873] [2022-03-19 23:21:25,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:25,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 23:21:25,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:25,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 23:21:25,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:21:25,569 INFO L87 Difference]: Start difference. First operand 374 states and 429 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:27,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:27,575 INFO L93 Difference]: Finished difference Result 442 states and 510 transitions. [2022-03-19 23:21:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:21:27,575 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-03-19 23:21:27,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:27,577 INFO L225 Difference]: With dead ends: 442 [2022-03-19 23:21:27,577 INFO L226 Difference]: Without dead ends: 428 [2022-03-19 23:21:27,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=546, Invalid=6936, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 23:21:27,580 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 843 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3795 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:27,580 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 236 Invalid, 3895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3795 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 23:21:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-03-19 23:21:27,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 419. [2022-03-19 23:21:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 359 states have (on average 1.1671309192200556) internal successors, (419), 393 states have internal predecessors, (419), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (41), 20 states have call predecessors, (41), 20 states have call successors, (41) [2022-03-19 23:21:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 482 transitions. [2022-03-19 23:21:27,683 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 482 transitions. Word has length 50 [2022-03-19 23:21:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:27,683 INFO L478 AbstractCegarLoop]: Abstraction has 419 states and 482 transitions. [2022-03-19 23:21:27,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 482 transitions. [2022-03-19 23:21:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 23:21:27,685 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:27,685 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:27,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:27,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:27,887 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash -522394929, now seen corresponding path program 48 times [2022-03-19 23:21:27,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:27,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913553194] [2022-03-19 23:21:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:27,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:27,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:27,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 23:21:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:28,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:28,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913553194] [2022-03-19 23:21:28,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913553194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:28,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906449654] [2022-03-19 23:21:28,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:21:28,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:28,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:28,218 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:28,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 23:21:28,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 23:21:28,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:28,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 23:21:28,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:28,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:29,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906449654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:29,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:29,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2022-03-19 23:21:29,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343629071] [2022-03-19 23:21:29,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:29,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 23:21:29,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:29,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 23:21:29,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:21:29,351 INFO L87 Difference]: Start difference. First operand 419 states and 482 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:31,689 INFO L93 Difference]: Finished difference Result 434 states and 497 transitions. [2022-03-19 23:21:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:21:31,689 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-03-19 23:21:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:31,691 INFO L225 Difference]: With dead ends: 434 [2022-03-19 23:21:31,691 INFO L226 Difference]: Without dead ends: 422 [2022-03-19 23:21:31,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=546, Invalid=6936, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 23:21:31,693 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 880 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3553 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 3639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:31,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 230 Invalid, 3639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3553 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 23:21:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-03-19 23:21:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-03-19 23:21:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 360 states have (on average 1.1666666666666667) internal successors, (420), 394 states have internal predecessors, (420), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-03-19 23:21:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 480 transitions. [2022-03-19 23:21:31,772 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 480 transitions. Word has length 50 [2022-03-19 23:21:31,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:31,773 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 480 transitions. [2022-03-19 23:21:31,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 480 transitions. [2022-03-19 23:21:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 23:21:31,775 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:31,775 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:31,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:31,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-19 23:21:31,977 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash 96500781, now seen corresponding path program 49 times [2022-03-19 23:21:31,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:31,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506254584] [2022-03-19 23:21:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:31,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:31,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:31,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:31,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:21:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:32,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:32,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506254584] [2022-03-19 23:21:32,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506254584] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:32,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120333010] [2022-03-19 23:21:32,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:21:32,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:32,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:32,055 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:32,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 23:21:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:32,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 23:21:32,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:32,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:32,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120333010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:32,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:32,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-03-19 23:21:32,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102508466] [2022-03-19 23:21:32,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:32,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:21:32,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:32,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:21:32,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:21:32,300 INFO L87 Difference]: Start difference. First operand 420 states and 480 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:21:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:32,694 INFO L93 Difference]: Finished difference Result 540 states and 625 transitions. [2022-03-19 23:21:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:21:32,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-03-19 23:21:32,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:32,702 INFO L225 Difference]: With dead ends: 540 [2022-03-19 23:21:32,702 INFO L226 Difference]: Without dead ends: 502 [2022-03-19 23:21:32,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 23:21:32,705 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 92 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:32,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 81 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:21:32,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-03-19 23:21:32,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2022-03-19 23:21:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 418 states have (on average 1.1650717703349283) internal successors, (487), 452 states have internal predecessors, (487), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-03-19 23:21:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 547 transitions. [2022-03-19 23:21:32,815 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 547 transitions. Word has length 50 [2022-03-19 23:21:32,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:32,816 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 547 transitions. [2022-03-19 23:21:32,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:21:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 547 transitions. [2022-03-19 23:21:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 23:21:32,820 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:32,820 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:32,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:33,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-19 23:21:33,036 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash -2133989358, now seen corresponding path program 50 times [2022-03-19 23:21:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:33,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993287226] [2022-03-19 23:21:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:33,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:33,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:33,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 23:21:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:33,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:33,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993287226] [2022-03-19 23:21:33,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993287226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:33,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618564240] [2022-03-19 23:21:33,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:21:33,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:33,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:33,104 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:33,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 23:21:33,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:21:33,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:33,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 23:21:33,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:33,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 23:21:33,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618564240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:33,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:33,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-03-19 23:21:33,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972827479] [2022-03-19 23:21:33,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:33,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:21:33,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:21:33,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:21:33,320 INFO L87 Difference]: Start difference. First operand 478 states and 547 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:33,701 INFO L93 Difference]: Finished difference Result 857 states and 980 transitions. [2022-03-19 23:21:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:21:33,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-03-19 23:21:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:33,705 INFO L225 Difference]: With dead ends: 857 [2022-03-19 23:21:33,705 INFO L226 Difference]: Without dead ends: 560 [2022-03-19 23:21:33,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 23:21:33,707 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 112 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:33,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 81 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:21:33,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-03-19 23:21:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 536. [2022-03-19 23:21:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-03-19 23:21:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 614 transitions. [2022-03-19 23:21:33,833 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 614 transitions. Word has length 50 [2022-03-19 23:21:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:33,834 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 614 transitions. [2022-03-19 23:21:33,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 614 transitions. [2022-03-19 23:21:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 23:21:33,836 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:33,836 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:33,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:34,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-19 23:21:34,053 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:34,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:34,053 INFO L85 PathProgramCache]: Analyzing trace with hash -33846038, now seen corresponding path program 51 times [2022-03-19 23:21:34,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:34,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641636661] [2022-03-19 23:21:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:34,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:34,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:34,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 23:21:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:21:34,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:34,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641636661] [2022-03-19 23:21:34,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641636661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:34,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423138340] [2022-03-19 23:21:34,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:21:34,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:34,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:34,423 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:34,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 23:21:34,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 23:21:34,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:34,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 23:21:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:21:34,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:21:34,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423138340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:34,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:34,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 39 [2022-03-19 23:21:34,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541121136] [2022-03-19 23:21:34,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:34,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 23:21:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 23:21:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:21:34,820 INFO L87 Difference]: Start difference. First operand 536 states and 614 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:36,670 INFO L93 Difference]: Finished difference Result 628 states and 719 transitions. [2022-03-19 23:21:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 23:21:36,671 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-03-19 23:21:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:36,673 INFO L225 Difference]: With dead ends: 628 [2022-03-19 23:21:36,673 INFO L226 Difference]: Without dead ends: 622 [2022-03-19 23:21:36,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=4589, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 23:21:36,676 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 219 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5307 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 5353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:36,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 278 Invalid, 5353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5307 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:21:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-03-19 23:21:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 552. [2022-03-19 23:21:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 489 states have (on average 1.16359918200409) internal successors, (569), 525 states have internal predecessors, (569), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2022-03-19 23:21:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 633 transitions. [2022-03-19 23:21:36,815 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 633 transitions. Word has length 51 [2022-03-19 23:21:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:36,815 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 633 transitions. [2022-03-19 23:21:36,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 633 transitions. [2022-03-19 23:21:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 23:21:36,818 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:36,818 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:36,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:37,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:37,023 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2139086154, now seen corresponding path program 52 times [2022-03-19 23:21:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:37,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018533722] [2022-03-19 23:21:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:37,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:37,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:37,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 23:21:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:21:37,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:37,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018533722] [2022-03-19 23:21:37,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018533722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:37,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441806694] [2022-03-19 23:21:37,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:21:37,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:37,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:37,497 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:37,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 23:21:37,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:21:37,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:37,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 23:21:37,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:21:37,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:21:38,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441806694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:38,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:38,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 39 [2022-03-19 23:21:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805779894] [2022-03-19 23:21:38,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:38,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 23:21:38,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 23:21:38,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1393, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:21:38,125 INFO L87 Difference]: Start difference. First operand 552 states and 633 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:39,546 INFO L93 Difference]: Finished difference Result 558 states and 638 transitions. [2022-03-19 23:21:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 23:21:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-03-19 23:21:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:39,548 INFO L225 Difference]: With dead ends: 558 [2022-03-19 23:21:39,548 INFO L226 Difference]: Without dead ends: 536 [2022-03-19 23:21:39,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=4313, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:21:39,550 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3784 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 3819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:39,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 238 Invalid, 3819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3784 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:21:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-03-19 23:21:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-03-19 23:21:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2022-03-19 23:21:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 615 transitions. [2022-03-19 23:21:39,682 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 615 transitions. Word has length 51 [2022-03-19 23:21:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:39,682 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 615 transitions. [2022-03-19 23:21:39,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 615 transitions. [2022-03-19 23:21:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 23:21:39,684 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:39,684 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:39,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:39,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-19 23:21:39,899 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:39,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1318950550, now seen corresponding path program 53 times [2022-03-19 23:21:39,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:39,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929828825] [2022-03-19 23:21:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:39,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:39,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:39,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:40,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 23:21:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:21:40,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:40,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929828825] [2022-03-19 23:21:40,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929828825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:40,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071888880] [2022-03-19 23:21:40,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:21:40,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:40,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:40,216 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:40,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 23:21:40,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-19 23:21:40,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:40,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 23:21:40,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:21:40,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:21:40,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071888880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:40,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:40,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 39 [2022-03-19 23:21:40,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191083683] [2022-03-19 23:21:40,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:40,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 23:21:40,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:40,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 23:21:40,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:21:40,710 INFO L87 Difference]: Start difference. First operand 536 states and 615 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:41,789 INFO L93 Difference]: Finished difference Result 542 states and 620 transitions. [2022-03-19 23:21:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 23:21:41,790 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-03-19 23:21:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:41,791 INFO L225 Difference]: With dead ends: 542 [2022-03-19 23:21:41,791 INFO L226 Difference]: Without dead ends: 518 [2022-03-19 23:21:41,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=4045, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 23:21:41,793 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 121 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:41,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 200 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:21:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-03-19 23:21:41,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-03-19 23:21:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 461 states have (on average 1.1648590021691974) internal successors, (537), 493 states have internal predecessors, (537), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (37), 19 states have call predecessors, (37), 19 states have call successors, (37) [2022-03-19 23:21:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 595 transitions. [2022-03-19 23:21:41,918 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 595 transitions. Word has length 51 [2022-03-19 23:21:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:41,919 INFO L478 AbstractCegarLoop]: Abstraction has 518 states and 595 transitions. [2022-03-19 23:21:41,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 595 transitions. [2022-03-19 23:21:41,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 23:21:41,925 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:41,925 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:41,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:42,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:42,131 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:42,131 INFO L85 PathProgramCache]: Analyzing trace with hash -774418501, now seen corresponding path program 54 times [2022-03-19 23:21:42,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:42,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561160696] [2022-03-19 23:21:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:42,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:42,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:42,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:21:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 23:21:42,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:42,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561160696] [2022-03-19 23:21:42,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561160696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:42,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012761542] [2022-03-19 23:21:42,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:21:42,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:42,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:42,353 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:42,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 23:21:42,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 23:21:42,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:42,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 23:21:42,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-19 23:21:42,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-19 23:21:43,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012761542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:43,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:43,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2022-03-19 23:21:43,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870703836] [2022-03-19 23:21:43,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:43,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 23:21:43,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:43,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 23:21:43,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:21:43,198 INFO L87 Difference]: Start difference. First operand 518 states and 595 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:44,428 INFO L93 Difference]: Finished difference Result 590 states and 681 transitions. [2022-03-19 23:21:44,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:21:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-19 23:21:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:44,433 INFO L225 Difference]: With dead ends: 590 [2022-03-19 23:21:44,433 INFO L226 Difference]: Without dead ends: 573 [2022-03-19 23:21:44,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=3097, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:21:44,435 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 496 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:44,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 163 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:21:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-03-19 23:21:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 568. [2022-03-19 23:21:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 490 states have (on average 1.153061224489796) internal successors, (565), 536 states have internal predecessors, (565), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2022-03-19 23:21:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 651 transitions. [2022-03-19 23:21:44,560 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 651 transitions. Word has length 51 [2022-03-19 23:21:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:44,560 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 651 transitions. [2022-03-19 23:21:44,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 651 transitions. [2022-03-19 23:21:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 23:21:44,563 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:44,563 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:44,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-19 23:21:44,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:44,779 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:44,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash -103251766, now seen corresponding path program 55 times [2022-03-19 23:21:44,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:44,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885082275] [2022-03-19 23:21:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:44,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:44,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:44,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:44,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 23:21:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:21:45,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:45,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885082275] [2022-03-19 23:21:45,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885082275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:45,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799331825] [2022-03-19 23:21:45,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:21:45,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:45,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:45,105 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:45,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 23:21:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:45,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 23:21:45,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:21:45,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:21:45,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799331825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:45,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:45,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 39 [2022-03-19 23:21:45,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25345736] [2022-03-19 23:21:45,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:45,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 23:21:45,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:45,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 23:21:45,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1385, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:21:45,702 INFO L87 Difference]: Start difference. First operand 568 states and 651 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:46,541 INFO L93 Difference]: Finished difference Result 586 states and 673 transitions. [2022-03-19 23:21:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 23:21:46,541 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-03-19 23:21:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:46,544 INFO L225 Difference]: With dead ends: 586 [2022-03-19 23:21:46,544 INFO L226 Difference]: Without dead ends: 569 [2022-03-19 23:21:46,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=3785, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 23:21:46,547 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:46,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 193 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1918 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:21:46,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-19 23:21:46,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 564. [2022-03-19 23:21:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 486 states have (on average 1.1563786008230452) internal successors, (562), 532 states have internal predecessors, (562), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2022-03-19 23:21:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 648 transitions. [2022-03-19 23:21:46,669 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 648 transitions. Word has length 51 [2022-03-19 23:21:46,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:46,669 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 648 transitions. [2022-03-19 23:21:46,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:46,669 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 648 transitions. [2022-03-19 23:21:46,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 23:21:46,672 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:46,672 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:46,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:46,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:46,885 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:46,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2133704513, now seen corresponding path program 56 times [2022-03-19 23:21:46,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:46,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664574687] [2022-03-19 23:21:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:46,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:46,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:46,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:47,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:21:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 23:21:47,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664574687] [2022-03-19 23:21:47,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664574687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099962572] [2022-03-19 23:21:47,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:21:47,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:47,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:47,118 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:47,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 23:21:47,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:21:47,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 23:21:47,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-19 23:21:47,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-19 23:21:47,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099962572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:47,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:47,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2022-03-19 23:21:47,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942679968] [2022-03-19 23:21:47,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:47,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 23:21:47,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:47,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 23:21:47,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:21:47,944 INFO L87 Difference]: Start difference. First operand 564 states and 648 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:49,414 INFO L93 Difference]: Finished difference Result 578 states and 661 transitions. [2022-03-19 23:21:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:21:49,414 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-19 23:21:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:49,416 INFO L225 Difference]: With dead ends: 578 [2022-03-19 23:21:49,417 INFO L226 Difference]: Without dead ends: 554 [2022-03-19 23:21:49,419 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=3097, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:21:49,419 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 386 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:49,419 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 174 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:21:49,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-03-19 23:21:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2022-03-19 23:21:49,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 474 states have (on average 1.1561181434599157) internal successors, (548), 520 states have internal predecessors, (548), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (52), 26 states have call predecessors, (52), 26 states have call successors, (52) [2022-03-19 23:21:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 628 transitions. [2022-03-19 23:21:49,555 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 628 transitions. Word has length 51 [2022-03-19 23:21:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:49,555 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 628 transitions. [2022-03-19 23:21:49,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 628 transitions. [2022-03-19 23:21:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 23:21:49,558 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:49,558 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:49,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:49,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:49,772 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:49,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2068699601, now seen corresponding path program 57 times [2022-03-19 23:21:49,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:49,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371532200] [2022-03-19 23:21:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:49,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:49,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:49,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:49,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 23:21:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:50,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:50,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371532200] [2022-03-19 23:21:50,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371532200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:50,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35068327] [2022-03-19 23:21:50,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:21:50,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:50,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:50,178 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:50,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 23:21:50,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-19 23:21:50,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:50,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 23:21:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:50,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:51,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35068327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:51,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:51,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2022-03-19 23:21:51,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599664034] [2022-03-19 23:21:51,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:51,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-19 23:21:51,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:51,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-19 23:21:51,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 23:21:51,609 INFO L87 Difference]: Start difference. First operand 552 states and 628 transitions. Second operand has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:54,016 INFO L93 Difference]: Finished difference Result 642 states and 735 transitions. [2022-03-19 23:21:54,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 23:21:54,016 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-19 23:21:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:54,020 INFO L225 Difference]: With dead ends: 642 [2022-03-19 23:21:54,020 INFO L226 Difference]: Without dead ends: 628 [2022-03-19 23:21:54,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=640, Invalid=8672, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 23:21:54,025 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 1094 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3995 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:54,025 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1099 Valid, 246 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 3995 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:21:54,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-19 23:21:54,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 619. [2022-03-19 23:21:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 532 states have (on average 1.1541353383458646) internal successors, (614), 584 states have internal predecessors, (614), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (61), 29 states have call predecessors, (61), 29 states have call successors, (61) [2022-03-19 23:21:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 706 transitions. [2022-03-19 23:21:54,162 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 706 transitions. Word has length 52 [2022-03-19 23:21:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:54,162 INFO L478 AbstractCegarLoop]: Abstraction has 619 states and 706 transitions. [2022-03-19 23:21:54,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:54,162 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 706 transitions. [2022-03-19 23:21:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 23:21:54,166 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:54,166 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:54,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:54,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-19 23:21:54,380 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash 333057708, now seen corresponding path program 58 times [2022-03-19 23:21:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:54,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381538974] [2022-03-19 23:21:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:54,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:54,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:54,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:21:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:54,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:54,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381538974] [2022-03-19 23:21:54,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381538974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:54,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372168345] [2022-03-19 23:21:54,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:21:54,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:54,747 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:54,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 23:21:54,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:21:54,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:54,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 23:21:54,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:55,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:21:55,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372168345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:55,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:55,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2022-03-19 23:21:55,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131423688] [2022-03-19 23:21:55,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:55,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-19 23:21:55,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:55,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-19 23:21:55,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 23:21:55,856 INFO L87 Difference]: Start difference. First operand 619 states and 706 transitions. Second operand has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:58,501 INFO L93 Difference]: Finished difference Result 634 states and 721 transitions. [2022-03-19 23:21:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 23:21:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-19 23:21:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:58,504 INFO L225 Difference]: With dead ends: 634 [2022-03-19 23:21:58,504 INFO L226 Difference]: Without dead ends: 622 [2022-03-19 23:21:58,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=640, Invalid=8672, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 23:21:58,508 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 1051 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5096 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 5201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 5096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:58,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1068 Valid, 280 Invalid, 5201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 5096 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:21:58,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-03-19 23:21:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 620. [2022-03-19 23:21:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 533 states have (on average 1.1538461538461537) internal successors, (615), 585 states have internal predecessors, (615), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-03-19 23:21:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 703 transitions. [2022-03-19 23:21:58,678 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 703 transitions. Word has length 52 [2022-03-19 23:21:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:58,678 INFO L478 AbstractCegarLoop]: Abstraction has 620 states and 703 transitions. [2022-03-19 23:21:58,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:21:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 703 transitions. [2022-03-19 23:21:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 23:21:58,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:58,682 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:58,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-19 23:21:58,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-19 23:21:58,896 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:21:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:21:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash -765588306, now seen corresponding path program 59 times [2022-03-19 23:21:58,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:21:58,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094788742] [2022-03-19 23:21:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:21:58,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:21:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:58,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:21:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:58,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:21:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:58,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 23:21:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:21:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:21:58,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:21:58,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094788742] [2022-03-19 23:21:58,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094788742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:21:58,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998020635] [2022-03-19 23:21:58,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:21:58,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:21:58,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:21:58,989 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:21:58,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 23:21:59,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-19 23:21:59,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:21:59,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 23:21:59,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:21:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:21:59,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:21:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:21:59,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998020635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:21:59,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:21:59,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-03-19 23:21:59,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464578868] [2022-03-19 23:21:59,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:21:59,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 23:21:59,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:21:59,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 23:21:59,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-03-19 23:21:59,227 INFO L87 Difference]: Start difference. First operand 620 states and 703 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:21:59,697 INFO L93 Difference]: Finished difference Result 944 states and 1054 transitions. [2022-03-19 23:21:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 23:21:59,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-03-19 23:21:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:21:59,704 INFO L225 Difference]: With dead ends: 944 [2022-03-19 23:21:59,704 INFO L226 Difference]: Without dead ends: 617 [2022-03-19 23:21:59,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=494, Invalid=1066, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 23:21:59,735 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:21:59,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 80 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:21:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-03-19 23:21:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 609. [2022-03-19 23:21:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 528 states have (on average 1.1477272727272727) internal successors, (606), 576 states have internal predecessors, (606), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2022-03-19 23:21:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 686 transitions. [2022-03-19 23:21:59,884 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 686 transitions. Word has length 52 [2022-03-19 23:21:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:21:59,885 INFO L478 AbstractCegarLoop]: Abstraction has 609 states and 686 transitions. [2022-03-19 23:21:59,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:21:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 686 transitions. [2022-03-19 23:21:59,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 23:21:59,888 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:21:59,888 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:21:59,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-19 23:22:00,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-19 23:22:00,102 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:00,103 INFO L85 PathProgramCache]: Analyzing trace with hash 295087821, now seen corresponding path program 60 times [2022-03-19 23:22:00,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:00,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430887855] [2022-03-19 23:22:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:00,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:00,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:00,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:00,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:22:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:22:00,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:00,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430887855] [2022-03-19 23:22:00,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430887855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:00,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577087155] [2022-03-19 23:22:00,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:22:00,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:00,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:00,173 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:00,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 23:22:00,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 23:22:00,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:00,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 23:22:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:22:00,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:22:00,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577087155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:00,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:00,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-03-19 23:22:00,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572850214] [2022-03-19 23:22:00,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:00,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 23:22:00,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 23:22:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-03-19 23:22:00,450 INFO L87 Difference]: Start difference. First operand 609 states and 686 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:22:00,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:00,877 INFO L93 Difference]: Finished difference Result 651 states and 736 transitions. [2022-03-19 23:22:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 23:22:00,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-03-19 23:22:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:00,880 INFO L225 Difference]: With dead ends: 651 [2022-03-19 23:22:00,880 INFO L226 Difference]: Without dead ends: 618 [2022-03-19 23:22:00,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=494, Invalid=1066, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 23:22:00,882 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 108 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:00,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 77 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:22:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-19 23:22:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-03-19 23:22:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2022-03-19 23:22:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 695 transitions. [2022-03-19 23:22:01,047 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 695 transitions. Word has length 52 [2022-03-19 23:22:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:01,047 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 695 transitions. [2022-03-19 23:22:01,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:22:01,047 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 695 transitions. [2022-03-19 23:22:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 23:22:01,050 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:01,050 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:01,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-19 23:22:01,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:01,267 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:01,267 INFO L85 PathProgramCache]: Analyzing trace with hash 715381933, now seen corresponding path program 61 times [2022-03-19 23:22:01,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:01,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415884931] [2022-03-19 23:22:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:01,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:01,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:01,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:01,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:22:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:22:01,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:01,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415884931] [2022-03-19 23:22:01,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415884931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:01,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229999362] [2022-03-19 23:22:01,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:22:01,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:01,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:01,802 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:01,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 23:22:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:01,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:22:01,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:22:02,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:22:02,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229999362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:02,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:02,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 41 [2022-03-19 23:22:02,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586083812] [2022-03-19 23:22:02,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:02,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 23:22:02,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:02,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 23:22:02,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1551, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 23:22:02,436 INFO L87 Difference]: Start difference. First operand 618 states and 695 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:04,193 INFO L93 Difference]: Finished difference Result 718 states and 808 transitions. [2022-03-19 23:22:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 23:22:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-03-19 23:22:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:04,196 INFO L225 Difference]: With dead ends: 718 [2022-03-19 23:22:04,197 INFO L226 Difference]: Without dead ends: 712 [2022-03-19 23:22:04,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=5149, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 23:22:04,199 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 241 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5791 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 5841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 5791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:04,199 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 286 Invalid, 5841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 5791 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 23:22:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-03-19 23:22:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 634. [2022-03-19 23:22:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 550 states have (on average 1.1454545454545455) internal successors, (630), 600 states have internal predecessors, (630), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (54), 28 states have call predecessors, (54), 28 states have call successors, (54) [2022-03-19 23:22:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 714 transitions. [2022-03-19 23:22:04,352 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 714 transitions. Word has length 53 [2022-03-19 23:22:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:04,354 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 714 transitions. [2022-03-19 23:22:04,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 714 transitions. [2022-03-19 23:22:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 23:22:04,357 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:04,357 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:04,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-19 23:22:04,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:04,571 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:04,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:04,572 INFO L85 PathProgramCache]: Analyzing trace with hash -839303187, now seen corresponding path program 62 times [2022-03-19 23:22:04,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:04,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143966720] [2022-03-19 23:22:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:04,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:04,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:04,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:22:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:22:05,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:05,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143966720] [2022-03-19 23:22:05,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143966720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:05,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633696150] [2022-03-19 23:22:05,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:22:05,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:05,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:05,042 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:05,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 23:22:05,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:22:05,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:05,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 23:22:05,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:22:05,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:22:05,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633696150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:05,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:05,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 41 [2022-03-19 23:22:05,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235589425] [2022-03-19 23:22:05,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:05,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 23:22:05,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 23:22:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1547, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 23:22:05,555 INFO L87 Difference]: Start difference. First operand 634 states and 714 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:07,296 INFO L93 Difference]: Finished difference Result 640 states and 719 transitions. [2022-03-19 23:22:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 23:22:07,300 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-03-19 23:22:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:07,302 INFO L225 Difference]: With dead ends: 640 [2022-03-19 23:22:07,302 INFO L226 Difference]: Without dead ends: 618 [2022-03-19 23:22:07,306 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=4857, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 23:22:07,306 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 174 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4530 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:07,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 256 Invalid, 4565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4530 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:22:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-19 23:22:07,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-03-19 23:22:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (52), 27 states have call predecessors, (52), 27 states have call successors, (52) [2022-03-19 23:22:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 696 transitions. [2022-03-19 23:22:07,455 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 696 transitions. Word has length 53 [2022-03-19 23:22:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:07,455 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 696 transitions. [2022-03-19 23:22:07,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 696 transitions. [2022-03-19 23:22:07,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 23:22:07,458 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:07,458 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:07,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-19 23:22:07,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:07,671 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:07,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:07,672 INFO L85 PathProgramCache]: Analyzing trace with hash 886283437, now seen corresponding path program 63 times [2022-03-19 23:22:07,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:07,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097501400] [2022-03-19 23:22:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:07,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:07,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:07,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:07,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:22:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:22:07,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097501400] [2022-03-19 23:22:07,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097501400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:07,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202589172] [2022-03-19 23:22:07,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:22:07,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:07,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:07,945 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:07,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 23:22:08,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:22:08,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:08,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 23:22:08,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:22:08,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:22:08,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202589172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:08,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:08,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 41 [2022-03-19 23:22:08,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779269824] [2022-03-19 23:22:08,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:08,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 23:22:08,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:08,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 23:22:08,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 23:22:08,457 INFO L87 Difference]: Start difference. First operand 618 states and 696 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:10,223 INFO L93 Difference]: Finished difference Result 624 states and 701 transitions. [2022-03-19 23:22:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 23:22:10,224 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-03-19 23:22:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:10,226 INFO L225 Difference]: With dead ends: 624 [2022-03-19 23:22:10,226 INFO L226 Difference]: Without dead ends: 600 [2022-03-19 23:22:10,229 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=257, Invalid=4573, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 23:22:10,229 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3940 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:10,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 251 Invalid, 3974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3940 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:22:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-03-19 23:22:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2022-03-19 23:22:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 522 states have (on average 1.1455938697318007) internal successors, (598), 568 states have internal predecessors, (598), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (50), 26 states have call predecessors, (50), 26 states have call successors, (50) [2022-03-19 23:22:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 676 transitions. [2022-03-19 23:22:10,373 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 676 transitions. Word has length 53 [2022-03-19 23:22:10,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:10,373 INFO L478 AbstractCegarLoop]: Abstraction has 600 states and 676 transitions. [2022-03-19 23:22:10,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 676 transitions. [2022-03-19 23:22:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 23:22:10,376 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:10,376 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:10,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-19 23:22:10,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:10,592 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:10,593 INFO L85 PathProgramCache]: Analyzing trace with hash -537493523, now seen corresponding path program 64 times [2022-03-19 23:22:10,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:10,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815966960] [2022-03-19 23:22:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:10,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:10,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:10,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:10,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:22:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:22:11,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:11,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815966960] [2022-03-19 23:22:11,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815966960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:11,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445104878] [2022-03-19 23:22:11,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:22:11,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:11,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:11,009 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:11,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 23:22:11,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:22:11,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:11,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 23:22:11,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:22:11,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:22:11,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445104878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:11,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:11,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 41 [2022-03-19 23:22:11,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096741913] [2022-03-19 23:22:11,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:11,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 23:22:11,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:11,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 23:22:11,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1539, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 23:22:11,904 INFO L87 Difference]: Start difference. First operand 600 states and 676 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:12,948 INFO L93 Difference]: Finished difference Result 606 states and 681 transitions. [2022-03-19 23:22:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 23:22:12,948 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-03-19 23:22:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:12,951 INFO L225 Difference]: With dead ends: 606 [2022-03-19 23:22:12,951 INFO L226 Difference]: Without dead ends: 580 [2022-03-19 23:22:12,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=259, Invalid=4297, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:22:12,953 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 96 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:12,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 216 Invalid, 2686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:22:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-03-19 23:22:13,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-03-19 23:22:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 505 states have (on average 1.1465346534653464) internal successors, (579), 549 states have internal predecessors, (579), 27 states have call successors, (27), 5 states have call predecessors, (27), 47 states have return successors, (48), 25 states have call predecessors, (48), 25 states have call successors, (48) [2022-03-19 23:22:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 654 transitions. [2022-03-19 23:22:13,095 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 654 transitions. Word has length 53 [2022-03-19 23:22:13,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:13,095 INFO L478 AbstractCegarLoop]: Abstraction has 580 states and 654 transitions. [2022-03-19 23:22:13,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:13,095 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 654 transitions. [2022-03-19 23:22:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 23:22:13,098 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:13,098 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:13,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-19 23:22:13,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:13,315 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1906924717, now seen corresponding path program 65 times [2022-03-19 23:22:13,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:13,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934065255] [2022-03-19 23:22:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:13,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:13,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:13,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:13,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:22:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:22:13,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:13,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934065255] [2022-03-19 23:22:13,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934065255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:13,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163062876] [2022-03-19 23:22:13,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:22:13,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:13,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:13,541 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:13,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-19 23:22:13,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-19 23:22:13,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:13,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 23:22:13,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:22:13,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:22:14,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163062876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:14,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:14,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2022-03-19 23:22:14,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754009399] [2022-03-19 23:22:14,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:14,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 23:22:14,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:14,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 23:22:14,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1535, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 23:22:14,184 INFO L87 Difference]: Start difference. First operand 580 states and 654 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:14,980 INFO L93 Difference]: Finished difference Result 598 states and 675 transitions. [2022-03-19 23:22:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 23:22:14,980 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-03-19 23:22:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:14,983 INFO L225 Difference]: With dead ends: 598 [2022-03-19 23:22:14,983 INFO L226 Difference]: Without dead ends: 592 [2022-03-19 23:22:14,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=4029, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 23:22:14,985 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:14,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 158 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:22:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-03-19 23:22:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 590. [2022-03-19 23:22:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 512 states have (on average 1.1484375) internal successors, (588), 558 states have internal predecessors, (588), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2022-03-19 23:22:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 667 transitions. [2022-03-19 23:22:15,181 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 667 transitions. Word has length 53 [2022-03-19 23:22:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:15,182 INFO L478 AbstractCegarLoop]: Abstraction has 590 states and 667 transitions. [2022-03-19 23:22:15,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:15,182 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 667 transitions. [2022-03-19 23:22:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 23:22:15,184 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:15,184 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:15,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-19 23:22:15,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-19 23:22:15,399 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:15,400 INFO L85 PathProgramCache]: Analyzing trace with hash -317468980, now seen corresponding path program 66 times [2022-03-19 23:22:15,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:15,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884728533] [2022-03-19 23:22:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:15,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:15,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:15,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:15,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:22:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:22:15,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:15,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884728533] [2022-03-19 23:22:15,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884728533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:15,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800015253] [2022-03-19 23:22:15,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:22:15,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:15,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:15,827 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:15,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-19 23:22:15,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 23:22:15,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:22:15,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:22:16,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:22:17,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800015253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:17,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:17,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2022-03-19 23:22:17,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072812104] [2022-03-19 23:22:17,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:17,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-19 23:22:17,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:17,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-19 23:22:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 23:22:17,715 INFO L87 Difference]: Start difference. First operand 590 states and 667 transitions. Second operand has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:22:21,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:21,705 INFO L93 Difference]: Finished difference Result 682 states and 776 transitions. [2022-03-19 23:22:21,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 23:22:21,706 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-03-19 23:22:21,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:21,710 INFO L225 Difference]: With dead ends: 682 [2022-03-19 23:22:21,710 INFO L226 Difference]: Without dead ends: 668 [2022-03-19 23:22:21,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=740, Invalid=10602, Unknown=0, NotChecked=0, Total=11342 [2022-03-19 23:22:21,713 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 1206 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6616 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 6760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 6616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:21,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 326 Invalid, 6760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 6616 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 23:22:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-03-19 23:22:21,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 659. [2022-03-19 23:22:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 572 states have (on average 1.1468531468531469) internal successors, (656), 624 states have internal predecessors, (656), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (60), 29 states have call predecessors, (60), 29 states have call successors, (60) [2022-03-19 23:22:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 747 transitions. [2022-03-19 23:22:21,901 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 747 transitions. Word has length 54 [2022-03-19 23:22:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:21,901 INFO L478 AbstractCegarLoop]: Abstraction has 659 states and 747 transitions. [2022-03-19 23:22:21,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:22:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 747 transitions. [2022-03-19 23:22:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 23:22:21,905 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:21,905 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:21,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-19 23:22:22,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-19 23:22:22,119 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1122563567, now seen corresponding path program 67 times [2022-03-19 23:22:22,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:22,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509485084] [2022-03-19 23:22:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:22,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:22,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:22,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:22,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 23:22:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:22:22,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509485084] [2022-03-19 23:22:22,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509485084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451931999] [2022-03-19 23:22:22,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:22:22,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:22,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:22,473 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:22,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-19 23:22:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:22,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:22:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:22:23,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:22:24,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451931999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:24,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:24,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2022-03-19 23:22:24,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097546231] [2022-03-19 23:22:24,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:24,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-19 23:22:24,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:24,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-19 23:22:24,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 23:22:24,071 INFO L87 Difference]: Start difference. First operand 659 states and 747 transitions. Second operand has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:22:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:27,668 INFO L93 Difference]: Finished difference Result 674 states and 762 transitions. [2022-03-19 23:22:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 23:22:27,668 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-03-19 23:22:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:27,671 INFO L225 Difference]: With dead ends: 674 [2022-03-19 23:22:27,671 INFO L226 Difference]: Without dead ends: 662 [2022-03-19 23:22:27,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=740, Invalid=10602, Unknown=0, NotChecked=0, Total=11342 [2022-03-19 23:22:27,674 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 1199 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 7192 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 7318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 7192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:27,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 340 Invalid, 7318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 7192 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 23:22:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-19 23:22:27,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 660. [2022-03-19 23:22:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 573 states have (on average 1.1465968586387434) internal successors, (657), 625 states have internal predecessors, (657), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-03-19 23:22:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 744 transitions. [2022-03-19 23:22:27,861 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 744 transitions. Word has length 54 [2022-03-19 23:22:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:27,862 INFO L478 AbstractCegarLoop]: Abstraction has 660 states and 744 transitions. [2022-03-19 23:22:27,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:22:27,862 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 744 transitions. [2022-03-19 23:22:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 23:22:27,865 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:27,865 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:27,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-19 23:22:28,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-19 23:22:28,080 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash 334260941, now seen corresponding path program 68 times [2022-03-19 23:22:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:28,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084355551] [2022-03-19 23:22:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:28,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:28,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:28,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:22:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:22:28,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:28,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084355551] [2022-03-19 23:22:28,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084355551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:28,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52141394] [2022-03-19 23:22:28,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:22:28,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:28,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:28,141 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:28,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-19 23:22:28,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:22:28,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:28,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 23:22:28,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:22:28,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:22:28,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52141394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:28,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:28,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-03-19 23:22:28,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117792627] [2022-03-19 23:22:28,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:28,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 23:22:28,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 23:22:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-03-19 23:22:28,460 INFO L87 Difference]: Start difference. First operand 660 states and 744 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:22:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:29,052 INFO L93 Difference]: Finished difference Result 818 states and 933 transitions. [2022-03-19 23:22:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 23:22:29,053 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-03-19 23:22:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:29,056 INFO L225 Difference]: With dead ends: 818 [2022-03-19 23:22:29,056 INFO L226 Difference]: Without dead ends: 772 [2022-03-19 23:22:29,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 23:22:29,060 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 129 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:29,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 80 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:22:29,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-03-19 23:22:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 742. [2022-03-19 23:22:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 655 states have (on average 1.1450381679389312) internal successors, (750), 707 states have internal predecessors, (750), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-03-19 23:22:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 837 transitions. [2022-03-19 23:22:29,287 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 837 transitions. Word has length 54 [2022-03-19 23:22:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:29,287 INFO L478 AbstractCegarLoop]: Abstraction has 742 states and 837 transitions. [2022-03-19 23:22:29,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:22:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 837 transitions. [2022-03-19 23:22:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 23:22:29,292 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:29,292 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:29,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-19 23:22:29,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-19 23:22:29,505 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1144517490, now seen corresponding path program 69 times [2022-03-19 23:22:29,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213403386] [2022-03-19 23:22:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:29,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:29,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:29,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:29,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 23:22:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:22:29,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:29,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213403386] [2022-03-19 23:22:29,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213403386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:29,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295487170] [2022-03-19 23:22:29,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:22:29,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:29,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:29,567 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:29,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-19 23:22:29,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:22:29,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:29,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 23:22:29,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:22:29,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 23:22:29,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295487170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:29,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:29,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-03-19 23:22:29,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233744162] [2022-03-19 23:22:29,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:29,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 23:22:29,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:29,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 23:22:29,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-03-19 23:22:29,772 INFO L87 Difference]: Start difference. First operand 742 states and 837 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:30,292 INFO L93 Difference]: Finished difference Result 1298 states and 1460 transitions. [2022-03-19 23:22:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 23:22:30,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-03-19 23:22:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:30,300 INFO L225 Difference]: With dead ends: 1298 [2022-03-19 23:22:30,300 INFO L226 Difference]: Without dead ends: 854 [2022-03-19 23:22:30,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 23:22:30,304 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 176 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:30,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 80 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:22:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-03-19 23:22:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 824. [2022-03-19 23:22:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2022-03-19 23:22:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 930 transitions. [2022-03-19 23:22:30,563 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 930 transitions. Word has length 54 [2022-03-19 23:22:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:30,563 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 930 transitions. [2022-03-19 23:22:30,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 930 transitions. [2022-03-19 23:22:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 23:22:30,568 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:30,568 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:30,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-19 23:22:30,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:30,775 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:30,776 INFO L85 PathProgramCache]: Analyzing trace with hash -579740214, now seen corresponding path program 70 times [2022-03-19 23:22:30,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:30,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478375993] [2022-03-19 23:22:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:30,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:30,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:30,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:31,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 23:22:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:22:31,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:31,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478375993] [2022-03-19 23:22:31,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478375993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:31,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587370542] [2022-03-19 23:22:31,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:22:31,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:31,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:31,349 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:31,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-19 23:22:31,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:22:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:31,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:22:31,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:22:31,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:22:31,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587370542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:31,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:31,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 43 [2022-03-19 23:22:31,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801769541] [2022-03-19 23:22:31,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:31,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 23:22:31,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 23:22:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1713, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 23:22:31,817 INFO L87 Difference]: Start difference. First operand 824 states and 930 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:33,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:33,974 INFO L93 Difference]: Finished difference Result 940 states and 1061 transitions. [2022-03-19 23:22:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 23:22:33,974 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-03-19 23:22:33,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:33,979 INFO L225 Difference]: With dead ends: 940 [2022-03-19 23:22:33,979 INFO L226 Difference]: Without dead ends: 934 [2022-03-19 23:22:33,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=265, Invalid=5741, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 23:22:33,983 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 265 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 6233 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 6285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 6233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:33,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 293 Invalid, 6285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 6233 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 23:22:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-03-19 23:22:34,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 840. [2022-03-19 23:22:34,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 750 states have (on average 1.144) internal successors, (858), 804 states have internal predecessors, (858), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (59), 30 states have call predecessors, (59), 30 states have call successors, (59) [2022-03-19 23:22:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 949 transitions. [2022-03-19 23:22:34,260 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 949 transitions. Word has length 55 [2022-03-19 23:22:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:34,260 INFO L478 AbstractCegarLoop]: Abstraction has 840 states and 949 transitions. [2022-03-19 23:22:34,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:34,260 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 949 transitions. [2022-03-19 23:22:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 23:22:34,265 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:34,265 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:34,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-19 23:22:34,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:34,482 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:34,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2028236118, now seen corresponding path program 71 times [2022-03-19 23:22:34,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:34,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217404230] [2022-03-19 23:22:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:34,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:34,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:34,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:34,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 23:22:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:22:34,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:34,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217404230] [2022-03-19 23:22:34,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217404230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:34,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432345658] [2022-03-19 23:22:34,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:22:34,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:34,835 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:34,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-19 23:22:34,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:22:34,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:34,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:22:34,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:22:35,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:22:35,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432345658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:35,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:35,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 43 [2022-03-19 23:22:35,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267195471] [2022-03-19 23:22:35,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:35,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 23:22:35,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:35,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 23:22:35,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1709, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 23:22:35,666 INFO L87 Difference]: Start difference. First operand 840 states and 949 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:37,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:37,775 INFO L93 Difference]: Finished difference Result 846 states and 954 transitions. [2022-03-19 23:22:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 23:22:37,775 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-03-19 23:22:37,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:37,780 INFO L225 Difference]: With dead ends: 846 [2022-03-19 23:22:37,780 INFO L226 Difference]: Without dead ends: 824 [2022-03-19 23:22:37,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=267, Invalid=5433, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 23:22:37,783 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6002 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 6041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 6002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:37,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 298 Invalid, 6041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 6002 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 23:22:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-03-19 23:22:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 824. [2022-03-19 23:22:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2022-03-19 23:22:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 931 transitions. [2022-03-19 23:22:38,060 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 931 transitions. Word has length 55 [2022-03-19 23:22:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:38,060 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 931 transitions. [2022-03-19 23:22:38,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 931 transitions. [2022-03-19 23:22:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 23:22:38,065 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:38,065 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:38,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-19 23:22:38,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:38,281 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:38,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:38,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1858987446, now seen corresponding path program 72 times [2022-03-19 23:22:38,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:38,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650737734] [2022-03-19 23:22:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:38,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:38,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:38,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:38,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 23:22:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:22:38,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:38,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650737734] [2022-03-19 23:22:38,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650737734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:38,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129386521] [2022-03-19 23:22:38,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:22:38,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:38,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:38,598 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:38,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-19 23:22:38,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 23:22:38,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:38,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 23:22:38,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:22:39,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:22:39,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129386521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:39,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:39,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 43 [2022-03-19 23:22:39,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536054678] [2022-03-19 23:22:39,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:39,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 23:22:39,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:39,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 23:22:39,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1705, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 23:22:39,274 INFO L87 Difference]: Start difference. First operand 824 states and 931 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:40,779 INFO L93 Difference]: Finished difference Result 830 states and 936 transitions. [2022-03-19 23:22:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 23:22:40,780 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-03-19 23:22:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:40,783 INFO L225 Difference]: With dead ends: 830 [2022-03-19 23:22:40,783 INFO L226 Difference]: Without dead ends: 806 [2022-03-19 23:22:40,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=269, Invalid=5133, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 23:22:40,786 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 159 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3850 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 3888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:40,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 238 Invalid, 3888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3850 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:22:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-03-19 23:22:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2022-03-19 23:22:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 722 states have (on average 1.1440443213296398) internal successors, (826), 772 states have internal predecessors, (826), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2022-03-19 23:22:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 911 transitions. [2022-03-19 23:22:41,050 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 911 transitions. Word has length 55 [2022-03-19 23:22:41,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:41,051 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 911 transitions. [2022-03-19 23:22:41,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:41,051 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 911 transitions. [2022-03-19 23:22:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 23:22:41,055 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:41,055 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:41,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-19 23:22:41,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-19 23:22:41,273 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2070730282, now seen corresponding path program 73 times [2022-03-19 23:22:41,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:41,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711858301] [2022-03-19 23:22:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:41,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:41,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:41,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:41,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 23:22:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:22:41,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:41,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711858301] [2022-03-19 23:22:41,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711858301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:41,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547817118] [2022-03-19 23:22:41,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:22:41,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:41,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:41,641 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:41,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-19 23:22:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:41,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 23:22:41,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:22:42,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:22:42,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547817118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:42,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:42,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 43 [2022-03-19 23:22:42,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688821376] [2022-03-19 23:22:42,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:42,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 23:22:42,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:42,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 23:22:42,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1701, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 23:22:42,312 INFO L87 Difference]: Start difference. First operand 806 states and 911 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:43,932 INFO L93 Difference]: Finished difference Result 812 states and 916 transitions. [2022-03-19 23:22:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 23:22:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-03-19 23:22:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:43,935 INFO L225 Difference]: With dead ends: 812 [2022-03-19 23:22:43,935 INFO L226 Difference]: Without dead ends: 786 [2022-03-19 23:22:43,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=271, Invalid=4841, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 23:22:43,939 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 120 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2702 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:43,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 205 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2702 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:22:43,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-03-19 23:22:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2022-03-19 23:22:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 705 states have (on average 1.1446808510638298) internal successors, (807), 753 states have internal predecessors, (807), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2022-03-19 23:22:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 889 transitions. [2022-03-19 23:22:44,186 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 889 transitions. Word has length 55 [2022-03-19 23:22:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:44,186 INFO L478 AbstractCegarLoop]: Abstraction has 786 states and 889 transitions. [2022-03-19 23:22:44,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 889 transitions. [2022-03-19 23:22:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 23:22:44,190 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:44,190 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:44,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-19 23:22:44,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:44,405 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:44,405 INFO L85 PathProgramCache]: Analyzing trace with hash -827352577, now seen corresponding path program 74 times [2022-03-19 23:22:44,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:44,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839790338] [2022-03-19 23:22:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:44,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:44,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:44,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:44,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:22:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:22:44,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:44,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839790338] [2022-03-19 23:22:44,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839790338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:44,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572054102] [2022-03-19 23:22:44,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:22:44,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:44,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:44,678 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:44,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-19 23:22:44,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:22:44,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:44,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 23:22:44,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 23:22:45,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 23:22:45,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572054102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:45,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:45,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2022-03-19 23:22:45,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453173693] [2022-03-19 23:22:45,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:45,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 23:22:45,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:45,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 23:22:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:22:45,695 INFO L87 Difference]: Start difference. First operand 786 states and 889 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:22:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:47,193 INFO L93 Difference]: Finished difference Result 874 states and 995 transitions. [2022-03-19 23:22:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 23:22:47,193 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-19 23:22:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:47,205 INFO L225 Difference]: With dead ends: 874 [2022-03-19 23:22:47,206 INFO L226 Difference]: Without dead ends: 856 [2022-03-19 23:22:47,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=4288, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 23:22:47,210 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 463 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:47,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 200 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2638 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 23:22:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-03-19 23:22:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 851. [2022-03-19 23:22:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 743 states have (on average 1.135935397039031) internal successors, (844), 809 states have internal predecessors, (844), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2022-03-19 23:22:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 962 transitions. [2022-03-19 23:22:47,519 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 962 transitions. Word has length 55 [2022-03-19 23:22:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:47,519 INFO L478 AbstractCegarLoop]: Abstraction has 851 states and 962 transitions. [2022-03-19 23:22:47,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:22:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 962 transitions. [2022-03-19 23:22:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 23:22:47,527 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:47,527 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:47,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-19 23:22:47,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:47,743 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash -704555318, now seen corresponding path program 75 times [2022-03-19 23:22:47,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:47,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792717173] [2022-03-19 23:22:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:47,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:47,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:47,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:47,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 23:22:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:22:48,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:48,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792717173] [2022-03-19 23:22:48,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792717173] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:48,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226920802] [2022-03-19 23:22:48,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:22:48,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:48,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:48,148 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:48,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-19 23:22:48,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:22:48,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 23:22:48,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:22:48,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:22:48,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226920802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:48,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:48,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 43 [2022-03-19 23:22:48,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652677606] [2022-03-19 23:22:48,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:48,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 23:22:48,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:48,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 23:22:48,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 23:22:48,776 INFO L87 Difference]: Start difference. First operand 851 states and 962 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:49,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:49,753 INFO L93 Difference]: Finished difference Result 869 states and 984 transitions. [2022-03-19 23:22:49,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 23:22:49,753 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-03-19 23:22:49,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:49,757 INFO L225 Difference]: With dead ends: 869 [2022-03-19 23:22:49,757 INFO L226 Difference]: Without dead ends: 851 [2022-03-19 23:22:49,761 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=4557, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 23:22:49,762 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:49,762 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 208 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:22:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-19 23:22:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 846. [2022-03-19 23:22:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 738 states have (on average 1.1382113821138211) internal successors, (840), 804 states have internal predecessors, (840), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2022-03-19 23:22:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 958 transitions. [2022-03-19 23:22:50,032 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 958 transitions. Word has length 55 [2022-03-19 23:22:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:50,032 INFO L478 AbstractCegarLoop]: Abstraction has 846 states and 958 transitions. [2022-03-19 23:22:50,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:22:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 958 transitions. [2022-03-19 23:22:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 23:22:50,038 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:50,038 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:50,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-19 23:22:50,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-19 23:22:50,251 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash -77183301, now seen corresponding path program 76 times [2022-03-19 23:22:50,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:50,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261604853] [2022-03-19 23:22:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:50,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:50,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:50,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:50,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:22:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:22:50,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:50,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261604853] [2022-03-19 23:22:50,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261604853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:50,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990586924] [2022-03-19 23:22:50,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:22:50,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:50,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:50,429 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:50,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-19 23:22:50,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:22:50,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:50,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 23:22:50,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 23:22:50,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 23:22:51,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990586924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:51,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:51,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2022-03-19 23:22:51,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492228258] [2022-03-19 23:22:51,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:51,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 23:22:51,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 23:22:51,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:22:51,096 INFO L87 Difference]: Start difference. First operand 846 states and 958 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:22:52,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:52,483 INFO L93 Difference]: Finished difference Result 860 states and 971 transitions. [2022-03-19 23:22:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 23:22:52,491 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-19 23:22:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:52,495 INFO L225 Difference]: With dead ends: 860 [2022-03-19 23:22:52,495 INFO L226 Difference]: Without dead ends: 834 [2022-03-19 23:22:52,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=404, Invalid=4288, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 23:22:52,500 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 603 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2623 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:52,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 201 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2623 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:22:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-03-19 23:22:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 832. [2022-03-19 23:22:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 724 states have (on average 1.138121546961326) internal successors, (824), 790 states have internal predecessors, (824), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (72), 36 states have call predecessors, (72), 36 states have call successors, (72) [2022-03-19 23:22:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 934 transitions. [2022-03-19 23:22:52,749 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 934 transitions. Word has length 55 [2022-03-19 23:22:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:52,763 INFO L478 AbstractCegarLoop]: Abstraction has 832 states and 934 transitions. [2022-03-19 23:22:52,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:22:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 934 transitions. [2022-03-19 23:22:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 23:22:52,769 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:52,769 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:52,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-19 23:22:52,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:52,987 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:22:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:22:52,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1811549873, now seen corresponding path program 77 times [2022-03-19 23:22:52,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:22:52,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060862716] [2022-03-19 23:22:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:22:52,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:22:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:53,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:22:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:53,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:22:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:53,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 23:22:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:22:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:22:53,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:22:53,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060862716] [2022-03-19 23:22:53,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060862716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:22:53,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626359578] [2022-03-19 23:22:53,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:22:53,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:22:53,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:22:53,426 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:22:53,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-19 23:22:53,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-19 23:22:53,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:22:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 23:22:53,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:22:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:22:54,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:22:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:22:55,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626359578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:22:55,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:22:55,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2022-03-19 23:22:55,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446170440] [2022-03-19 23:22:55,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:22:55,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-19 23:22:55,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:22:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-19 23:22:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 23:22:55,234 INFO L87 Difference]: Start difference. First operand 832 states and 934 transitions. Second operand has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:22:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:22:59,488 INFO L93 Difference]: Finished difference Result 948 states and 1071 transitions. [2022-03-19 23:22:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 23:22:59,488 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-03-19 23:22:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:22:59,495 INFO L225 Difference]: With dead ends: 948 [2022-03-19 23:22:59,495 INFO L226 Difference]: Without dead ends: 934 [2022-03-19 23:22:59,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=846, Invalid=12726, Unknown=0, NotChecked=0, Total=13572 [2022-03-19 23:22:59,501 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 1454 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7558 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 7727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 7558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:22:59,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 336 Invalid, 7727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 7558 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 23:22:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-03-19 23:22:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 925. [2022-03-19 23:22:59,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 805 states have (on average 1.1366459627329193) internal successors, (915), 879 states have internal predecessors, (915), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (84), 40 states have call predecessors, (84), 40 states have call successors, (84) [2022-03-19 23:22:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1041 transitions. [2022-03-19 23:22:59,810 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1041 transitions. Word has length 56 [2022-03-19 23:22:59,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:22:59,810 INFO L478 AbstractCegarLoop]: Abstraction has 925 states and 1041 transitions. [2022-03-19 23:22:59,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:22:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1041 transitions. [2022-03-19 23:22:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 23:22:59,816 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:22:59,816 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:22:59,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-19 23:23:00,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:00,031 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:00,032 INFO L85 PathProgramCache]: Analyzing trace with hash -120213876, now seen corresponding path program 78 times [2022-03-19 23:23:00,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:00,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598210862] [2022-03-19 23:23:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:00,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:00,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:00,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:00,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:23:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:23:00,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598210862] [2022-03-19 23:23:00,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598210862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055708409] [2022-03-19 23:23:00,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:23:00,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:00,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:00,315 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:00,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-19 23:23:00,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 23:23:00,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:00,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 23:23:00,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:23:00,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:23:01,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055708409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:01,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:01,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2022-03-19 23:23:01,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551919268] [2022-03-19 23:23:01,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:01,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-19 23:23:01,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-19 23:23:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 23:23:01,892 INFO L87 Difference]: Start difference. First operand 925 states and 1041 transitions. Second operand has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:23:05,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:05,961 INFO L93 Difference]: Finished difference Result 940 states and 1056 transitions. [2022-03-19 23:23:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 23:23:05,961 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-03-19 23:23:05,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:05,965 INFO L225 Difference]: With dead ends: 940 [2022-03-19 23:23:05,965 INFO L226 Difference]: Without dead ends: 928 [2022-03-19 23:23:05,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=846, Invalid=12726, Unknown=0, NotChecked=0, Total=13572 [2022-03-19 23:23:05,970 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 1539 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 6750 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 6899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 6750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:05,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 315 Invalid, 6899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 6750 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 23:23:05,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-03-19 23:23:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 926. [2022-03-19 23:23:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 806 states have (on average 1.1364764267990075) internal successors, (916), 880 states have internal predecessors, (916), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2022-03-19 23:23:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1037 transitions. [2022-03-19 23:23:06,284 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1037 transitions. Word has length 56 [2022-03-19 23:23:06,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:06,284 INFO L478 AbstractCegarLoop]: Abstraction has 926 states and 1037 transitions. [2022-03-19 23:23:06,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:23:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1037 transitions. [2022-03-19 23:23:06,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 23:23:06,290 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:06,290 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:06,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-19 23:23:06,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:06,494 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:06,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:06,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2099731086, now seen corresponding path program 79 times [2022-03-19 23:23:06,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:06,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933030427] [2022-03-19 23:23:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:06,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:06,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:06,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:06,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 23:23:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:06,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:06,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933030427] [2022-03-19 23:23:06,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933030427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:06,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72551264] [2022-03-19 23:23:06,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:23:06,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:06,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:06,561 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:06,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-19 23:23:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:06,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:23:06,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:06,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:06,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72551264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:06,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:06,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 22 [2022-03-19 23:23:06,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846161131] [2022-03-19 23:23:06,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:06,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 23:23:06,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:06,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 23:23:06,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-03-19 23:23:06,828 INFO L87 Difference]: Start difference. First operand 926 states and 1037 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:07,436 INFO L93 Difference]: Finished difference Result 1404 states and 1549 transitions. [2022-03-19 23:23:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:23:07,436 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-03-19 23:23:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:07,444 INFO L225 Difference]: With dead ends: 1404 [2022-03-19 23:23:07,444 INFO L226 Difference]: Without dead ends: 925 [2022-03-19 23:23:07,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=764, Invalid=1686, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 23:23:07,450 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 103 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:07,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 74 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:23:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-03-19 23:23:07,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 917. [2022-03-19 23:23:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 803 states have (on average 1.13200498132005) internal successors, (909), 873 states have internal predecessors, (909), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2022-03-19 23:23:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1022 transitions. [2022-03-19 23:23:07,788 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1022 transitions. Word has length 56 [2022-03-19 23:23:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:07,788 INFO L478 AbstractCegarLoop]: Abstraction has 917 states and 1022 transitions. [2022-03-19 23:23:07,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:07,788 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1022 transitions. [2022-03-19 23:23:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 23:23:07,794 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:07,794 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:07,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-19 23:23:08,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-19 23:23:08,007 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1863657747, now seen corresponding path program 80 times [2022-03-19 23:23:08,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:08,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159435015] [2022-03-19 23:23:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:08,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:08,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:08,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:08,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:23:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:08,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:08,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159435015] [2022-03-19 23:23:08,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159435015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:08,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921563129] [2022-03-19 23:23:08,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:23:08,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:08,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:08,104 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:08,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-19 23:23:08,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:23:08,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:08,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:23:08,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:08,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:08,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921563129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:08,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:08,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 22 [2022-03-19 23:23:08,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421165828] [2022-03-19 23:23:08,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:08,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 23:23:08,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:08,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 23:23:08,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-03-19 23:23:08,381 INFO L87 Difference]: Start difference. First operand 917 states and 1022 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:23:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:09,043 INFO L93 Difference]: Finished difference Result 967 states and 1082 transitions. [2022-03-19 23:23:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:23:09,043 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2022-03-19 23:23:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:09,047 INFO L225 Difference]: With dead ends: 967 [2022-03-19 23:23:09,047 INFO L226 Difference]: Without dead ends: 928 [2022-03-19 23:23:09,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=764, Invalid=1686, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 23:23:09,053 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 127 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:09,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 74 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:23:09,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-03-19 23:23:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-03-19 23:23:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 814 states have (on average 1.1302211302211302) internal successors, (920), 884 states have internal predecessors, (920), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2022-03-19 23:23:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1033 transitions. [2022-03-19 23:23:09,362 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1033 transitions. Word has length 56 [2022-03-19 23:23:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:09,362 INFO L478 AbstractCegarLoop]: Abstraction has 928 states and 1033 transitions. [2022-03-19 23:23:09,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:23:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1033 transitions. [2022-03-19 23:23:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 23:23:09,368 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:09,368 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:09,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-19 23:23:09,572 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-19 23:23:09,572 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:09,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:09,573 INFO L85 PathProgramCache]: Analyzing trace with hash -451135283, now seen corresponding path program 81 times [2022-03-19 23:23:09,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:09,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538061809] [2022-03-19 23:23:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:09,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:09,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:09,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:09,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:23:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:23:09,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538061809] [2022-03-19 23:23:09,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538061809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033136335] [2022-03-19 23:23:09,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:23:09,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:09,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:09,977 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:09,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-19 23:23:10,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-19 23:23:10,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 23:23:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:23:10,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:23:10,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033136335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:10,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:10,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 45 [2022-03-19 23:23:10,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296935030] [2022-03-19 23:23:10,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:10,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 23:23:10,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:10,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 23:23:10,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1883, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:23:10,479 INFO L87 Difference]: Start difference. First operand 928 states and 1033 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:13,036 INFO L93 Difference]: Finished difference Result 1052 states and 1172 transitions. [2022-03-19 23:23:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 23:23:13,036 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-19 23:23:13,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:13,042 INFO L225 Difference]: With dead ends: 1052 [2022-03-19 23:23:13,042 INFO L226 Difference]: Without dead ends: 1046 [2022-03-19 23:23:13,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=277, Invalid=6365, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 23:23:13,054 INFO L913 BasicCegarLoop]: 129 mSDtfsCounter, 286 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 7498 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 7554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 7498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:13,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 321 Invalid, 7554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 7498 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 23:23:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-19 23:23:13,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 944. [2022-03-19 23:23:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 827 states have (on average 1.1305925030229746) internal successors, (935), 899 states have internal predecessors, (935), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (76), 39 states have call predecessors, (76), 39 states have call successors, (76) [2022-03-19 23:23:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1052 transitions. [2022-03-19 23:23:13,447 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1052 transitions. Word has length 57 [2022-03-19 23:23:13,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:13,448 INFO L478 AbstractCegarLoop]: Abstraction has 944 states and 1052 transitions. [2022-03-19 23:23:13,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:13,448 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1052 transitions. [2022-03-19 23:23:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 23:23:13,455 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:13,455 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:13,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-19 23:23:13,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:13,672 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -866207603, now seen corresponding path program 82 times [2022-03-19 23:23:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:13,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711784821] [2022-03-19 23:23:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:13,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:13,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:13,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:13,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:23:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:23:14,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:14,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711784821] [2022-03-19 23:23:14,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711784821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:14,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403533186] [2022-03-19 23:23:14,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:23:14,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:14,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:14,056 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:14,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-19 23:23:14,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:23:14,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:14,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:23:14,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:23:14,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:23:14,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403533186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:14,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:14,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 45 [2022-03-19 23:23:14,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202796498] [2022-03-19 23:23:14,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:14,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 23:23:14,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:14,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 23:23:14,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1879, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:23:14,724 INFO L87 Difference]: Start difference. First operand 944 states and 1052 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:16,626 INFO L93 Difference]: Finished difference Result 950 states and 1057 transitions. [2022-03-19 23:23:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 23:23:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-19 23:23:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:16,631 INFO L225 Difference]: With dead ends: 950 [2022-03-19 23:23:16,631 INFO L226 Difference]: Without dead ends: 928 [2022-03-19 23:23:16,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=6041, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 23:23:16,637 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 212 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6597 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 6636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 6597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:16,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 306 Invalid, 6636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 6597 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 23:23:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-03-19 23:23:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-03-19 23:23:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 814 states have (on average 1.1302211302211302) internal successors, (920), 884 states have internal predecessors, (920), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2022-03-19 23:23:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1034 transitions. [2022-03-19 23:23:16,975 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1034 transitions. Word has length 57 [2022-03-19 23:23:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:16,975 INFO L478 AbstractCegarLoop]: Abstraction has 928 states and 1034 transitions. [2022-03-19 23:23:16,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1034 transitions. [2022-03-19 23:23:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 23:23:16,981 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:16,981 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:17,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-19 23:23:17,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-19 23:23:17,195 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1830582477, now seen corresponding path program 83 times [2022-03-19 23:23:17,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:17,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272904383] [2022-03-19 23:23:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:17,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:17,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:17,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:17,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:23:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:23:17,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:17,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272904383] [2022-03-19 23:23:17,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272904383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:17,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125287864] [2022-03-19 23:23:17,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:23:17,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:17,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:17,720 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:17,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-19 23:23:17,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:23:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:17,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:23:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:23:18,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:23:18,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125287864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:18,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:18,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 45 [2022-03-19 23:23:18,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901032154] [2022-03-19 23:23:18,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:18,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 23:23:18,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:18,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 23:23:18,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1875, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:23:18,689 INFO L87 Difference]: Start difference. First operand 928 states and 1034 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:20,609 INFO L93 Difference]: Finished difference Result 934 states and 1039 transitions. [2022-03-19 23:23:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 23:23:20,610 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-19 23:23:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:20,613 INFO L225 Difference]: With dead ends: 934 [2022-03-19 23:23:20,613 INFO L226 Difference]: Without dead ends: 910 [2022-03-19 23:23:20,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=281, Invalid=5725, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 23:23:20,618 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 174 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5329 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 5367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 5329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:20,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 281 Invalid, 5367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 5329 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 23:23:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-03-19 23:23:20,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 910. [2022-03-19 23:23:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 799 states have (on average 1.130162703379224) internal successors, (903), 867 states have internal predecessors, (903), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (72), 37 states have call predecessors, (72), 37 states have call successors, (72) [2022-03-19 23:23:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1014 transitions. [2022-03-19 23:23:20,922 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1014 transitions. Word has length 57 [2022-03-19 23:23:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:20,922 INFO L478 AbstractCegarLoop]: Abstraction has 910 states and 1014 transitions. [2022-03-19 23:23:20,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1014 transitions. [2022-03-19 23:23:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 23:23:20,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:20,928 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:20,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-19 23:23:21,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:21,131 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash -381847411, now seen corresponding path program 84 times [2022-03-19 23:23:21,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:21,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574596308] [2022-03-19 23:23:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:21,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:21,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:21,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:23:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:23:21,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:21,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574596308] [2022-03-19 23:23:21,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574596308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:21,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545865310] [2022-03-19 23:23:21,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:23:21,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:21,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:21,480 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:21,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-19 23:23:21,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 23:23:21,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:21,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 23:23:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:23:22,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:23:22,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545865310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:22,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:22,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 45 [2022-03-19 23:23:22,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254547041] [2022-03-19 23:23:22,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:22,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 23:23:22,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:22,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 23:23:22,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1871, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:23:22,219 INFO L87 Difference]: Start difference. First operand 910 states and 1014 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:23,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:23,607 INFO L93 Difference]: Finished difference Result 916 states and 1019 transitions. [2022-03-19 23:23:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 23:23:23,607 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-19 23:23:23,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:23,610 INFO L225 Difference]: With dead ends: 916 [2022-03-19 23:23:23,610 INFO L226 Difference]: Without dead ends: 890 [2022-03-19 23:23:23,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=5417, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 23:23:23,615 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4012 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 4048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:23,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 251 Invalid, 4048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4012 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:23:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-03-19 23:23:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2022-03-19 23:23:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 782 states have (on average 1.1304347826086956) internal successors, (884), 848 states have internal predecessors, (884), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (70), 36 states have call predecessors, (70), 36 states have call successors, (70) [2022-03-19 23:23:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 992 transitions. [2022-03-19 23:23:23,906 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 992 transitions. Word has length 57 [2022-03-19 23:23:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:23,906 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 992 transitions. [2022-03-19 23:23:23,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 992 transitions. [2022-03-19 23:23:23,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 23:23:23,912 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:23,912 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:23,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-19 23:23:24,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:24,127 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:24,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:24,127 INFO L85 PathProgramCache]: Analyzing trace with hash -799098675, now seen corresponding path program 85 times [2022-03-19 23:23:24,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:24,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303127685] [2022-03-19 23:23:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:24,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:24,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:24,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:24,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:23:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:23:24,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:24,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303127685] [2022-03-19 23:23:24,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303127685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:24,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119309209] [2022-03-19 23:23:24,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:23:24,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:24,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:24,503 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:24,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-19 23:23:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:24,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 23:23:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:23:24,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:23:25,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119309209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:25,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:25,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 45 [2022-03-19 23:23:25,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040050647] [2022-03-19 23:23:25,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:25,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 23:23:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 23:23:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1867, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:23:25,148 INFO L87 Difference]: Start difference. First operand 890 states and 992 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:26,322 INFO L93 Difference]: Finished difference Result 896 states and 997 transitions. [2022-03-19 23:23:26,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 23:23:26,322 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-19 23:23:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:26,325 INFO L225 Difference]: With dead ends: 896 [2022-03-19 23:23:26,325 INFO L226 Difference]: Without dead ends: 868 [2022-03-19 23:23:26,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=285, Invalid=5117, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 23:23:26,330 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 96 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3053 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:26,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 236 Invalid, 3087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3053 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:23:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-03-19 23:23:26,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2022-03-19 23:23:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 763 states have (on average 1.1310615989515072) internal successors, (863), 827 states have internal predecessors, (863), 37 states have call successors, (37), 5 states have call predecessors, (37), 67 states have return successors, (68), 35 states have call predecessors, (68), 35 states have call successors, (68) [2022-03-19 23:23:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 968 transitions. [2022-03-19 23:23:26,621 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 968 transitions. Word has length 57 [2022-03-19 23:23:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:26,621 INFO L478 AbstractCegarLoop]: Abstraction has 868 states and 968 transitions. [2022-03-19 23:23:26,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:26,621 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 968 transitions. [2022-03-19 23:23:26,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 23:23:26,627 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:26,627 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:26,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-19 23:23:26,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:26,844 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:26,844 INFO L85 PathProgramCache]: Analyzing trace with hash -589678451, now seen corresponding path program 86 times [2022-03-19 23:23:26,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:26,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597964838] [2022-03-19 23:23:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:26,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:26,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:26,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:26,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:23:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:23:27,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:27,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597964838] [2022-03-19 23:23:27,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597964838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:27,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957393550] [2022-03-19 23:23:27,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:23:27,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:27,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:27,093 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:27,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-19 23:23:27,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:23:27,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:27,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 23:23:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:23:27,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:23:27,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957393550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:27,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:27,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 45 [2022-03-19 23:23:27,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090589400] [2022-03-19 23:23:27,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:27,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 23:23:27,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:27,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 23:23:27,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1863, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:23:27,933 INFO L87 Difference]: Start difference. First operand 868 states and 968 transitions. Second operand has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:28,991 INFO L93 Difference]: Finished difference Result 886 states and 989 transitions. [2022-03-19 23:23:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 23:23:28,991 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-03-19 23:23:28,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:28,996 INFO L225 Difference]: With dead ends: 886 [2022-03-19 23:23:28,996 INFO L226 Difference]: Without dead ends: 880 [2022-03-19 23:23:29,001 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=287, Invalid=4825, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 23:23:29,001 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:29,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 168 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:23:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-03-19 23:23:29,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 878. [2022-03-19 23:23:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 770 states have (on average 1.1324675324675324) internal successors, (872), 836 states have internal predecessors, (872), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (71), 36 states have call predecessors, (71), 36 states have call successors, (71) [2022-03-19 23:23:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 981 transitions. [2022-03-19 23:23:29,291 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 981 transitions. Word has length 57 [2022-03-19 23:23:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:29,291 INFO L478 AbstractCegarLoop]: Abstraction has 878 states and 981 transitions. [2022-03-19 23:23:29,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 39 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 981 transitions. [2022-03-19 23:23:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 23:23:29,297 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:29,297 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:29,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-19 23:23:29,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:29,511 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2119764308, now seen corresponding path program 87 times [2022-03-19 23:23:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122374924] [2022-03-19 23:23:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:29,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:29,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:29,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:29,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:23:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:23:29,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:29,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122374924] [2022-03-19 23:23:29,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122374924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:29,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321029256] [2022-03-19 23:23:29,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:23:29,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:29,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:29,999 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:29,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-19 23:23:30,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-19 23:23:30,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:30,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 23:23:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:23:31,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:23:32,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321029256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:32,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:32,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 79 [2022-03-19 23:23:32,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069649219] [2022-03-19 23:23:32,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:32,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-19 23:23:32,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:32,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-19 23:23:32,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5898, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 23:23:32,343 INFO L87 Difference]: Start difference. First operand 878 states and 981 transitions. Second operand has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:23:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:37,489 INFO L93 Difference]: Finished difference Result 996 states and 1120 transitions. [2022-03-19 23:23:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 23:23:37,490 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-03-19 23:23:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:37,498 INFO L225 Difference]: With dead ends: 996 [2022-03-19 23:23:37,499 INFO L226 Difference]: Without dead ends: 982 [2022-03-19 23:23:37,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=958, Invalid=15044, Unknown=0, NotChecked=0, Total=16002 [2022-03-19 23:23:37,504 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 1785 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8227 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 8423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 8227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:37,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1790 Valid, 341 Invalid, 8423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 8227 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 23:23:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-03-19 23:23:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 973. [2022-03-19 23:23:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 853 states have (on average 1.1313012895662369) internal successors, (965), 927 states have internal predecessors, (965), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (83), 40 states have call predecessors, (83), 40 states have call successors, (83) [2022-03-19 23:23:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1090 transitions. [2022-03-19 23:23:37,886 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1090 transitions. Word has length 58 [2022-03-19 23:23:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:37,886 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1090 transitions. [2022-03-19 23:23:37,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:23:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1090 transitions. [2022-03-19 23:23:37,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 23:23:37,893 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:37,893 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:37,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-19 23:23:38,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:38,103 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1227955953, now seen corresponding path program 88 times [2022-03-19 23:23:38,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:38,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641307762] [2022-03-19 23:23:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:38,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:38,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:38,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:38,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 23:23:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:23:38,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:38,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641307762] [2022-03-19 23:23:38,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641307762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:38,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22839154] [2022-03-19 23:23:38,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:23:38,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:38,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:38,577 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:38,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-19 23:23:38,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:23:38,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:38,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 23:23:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:23:39,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:23:40,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22839154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:40,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:40,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 79 [2022-03-19 23:23:40,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345115113] [2022-03-19 23:23:40,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:40,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-19 23:23:40,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:40,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-19 23:23:40,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5898, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 23:23:40,899 INFO L87 Difference]: Start difference. First operand 973 states and 1090 transitions. Second operand has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:23:45,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:45,786 INFO L93 Difference]: Finished difference Result 988 states and 1105 transitions. [2022-03-19 23:23:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 23:23:45,786 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-03-19 23:23:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:45,790 INFO L225 Difference]: With dead ends: 988 [2022-03-19 23:23:45,790 INFO L226 Difference]: Without dead ends: 976 [2022-03-19 23:23:45,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=958, Invalid=15044, Unknown=0, NotChecked=0, Total=16002 [2022-03-19 23:23:45,798 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 1786 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 8958 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1809 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 9132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 8958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:45,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1809 Valid, 375 Invalid, 9132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 8958 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 23:23:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-03-19 23:23:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 974. [2022-03-19 23:23:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 854 states have (on average 1.1311475409836065) internal successors, (966), 928 states have internal predecessors, (966), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-03-19 23:23:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1086 transitions. [2022-03-19 23:23:46,158 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1086 transitions. Word has length 58 [2022-03-19 23:23:46,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:46,158 INFO L478 AbstractCegarLoop]: Abstraction has 974 states and 1086 transitions. [2022-03-19 23:23:46,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 78 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:23:46,158 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1086 transitions. [2022-03-19 23:23:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 23:23:46,164 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:46,164 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:46,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-19 23:23:46,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-19 23:23:46,381 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:46,381 INFO L85 PathProgramCache]: Analyzing trace with hash 248974061, now seen corresponding path program 89 times [2022-03-19 23:23:46,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:46,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210402017] [2022-03-19 23:23:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:46,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:46,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:46,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:46,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:23:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:46,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:46,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210402017] [2022-03-19 23:23:46,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210402017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:46,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59271177] [2022-03-19 23:23:46,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:23:46,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:46,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:46,487 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:46,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-19 23:23:46,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:23:46,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:46,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 23:23:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:46,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:46,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59271177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:46,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:46,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-03-19 23:23:46,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725197190] [2022-03-19 23:23:46,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:46,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 23:23:46,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:46,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 23:23:46,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-03-19 23:23:46,816 INFO L87 Difference]: Start difference. First operand 974 states and 1086 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:23:47,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:47,810 INFO L93 Difference]: Finished difference Result 1174 states and 1323 transitions. [2022-03-19 23:23:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 23:23:47,810 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2022-03-19 23:23:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:47,821 INFO L225 Difference]: With dead ends: 1174 [2022-03-19 23:23:47,821 INFO L226 Difference]: Without dead ends: 1120 [2022-03-19 23:23:47,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:23:47,829 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 160 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:47,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 74 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:23:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-03-19 23:23:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1084. [2022-03-19 23:23:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 964 states have (on average 1.129668049792531) internal successors, (1089), 1038 states have internal predecessors, (1089), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-03-19 23:23:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1209 transitions. [2022-03-19 23:23:48,235 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1209 transitions. Word has length 58 [2022-03-19 23:23:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:48,235 INFO L478 AbstractCegarLoop]: Abstraction has 1084 states and 1209 transitions. [2022-03-19 23:23:48,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:23:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1209 transitions. [2022-03-19 23:23:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 23:23:48,281 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:48,281 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:48,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-19 23:23:48,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-19 23:23:48,496 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1022687022, now seen corresponding path program 90 times [2022-03-19 23:23:48,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:48,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016972580] [2022-03-19 23:23:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:48,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:48,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:48,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:48,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 23:23:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:48,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:48,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016972580] [2022-03-19 23:23:48,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016972580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:48,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615487418] [2022-03-19 23:23:48,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:23:48,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:48,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:48,592 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:48,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-19 23:23:48,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 23:23:48,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:48,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 23:23:48,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:48,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 23:23:48,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615487418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:48,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:48,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-03-19 23:23:48,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366570441] [2022-03-19 23:23:48,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:48,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 23:23:48,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:48,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 23:23:48,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-03-19 23:23:48,930 INFO L87 Difference]: Start difference. First operand 1084 states and 1209 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:49,944 INFO L93 Difference]: Finished difference Result 1860 states and 2065 transitions. [2022-03-19 23:23:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 23:23:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-03-19 23:23:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:49,959 INFO L225 Difference]: With dead ends: 1860 [2022-03-19 23:23:49,960 INFO L226 Difference]: Without dead ends: 1230 [2022-03-19 23:23:49,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:23:49,969 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:49,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 79 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:23:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-03-19 23:23:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1194. [2022-03-19 23:23:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1074 states have (on average 1.1284916201117319) internal successors, (1212), 1148 states have internal predecessors, (1212), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2022-03-19 23:23:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1332 transitions. [2022-03-19 23:23:50,437 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1332 transitions. Word has length 58 [2022-03-19 23:23:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:50,437 INFO L478 AbstractCegarLoop]: Abstraction has 1194 states and 1332 transitions. [2022-03-19 23:23:50,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:50,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1332 transitions. [2022-03-19 23:23:50,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:23:50,445 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:50,445 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:50,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-19 23:23:50,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-19 23:23:50,651 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash -431401302, now seen corresponding path program 91 times [2022-03-19 23:23:50,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:50,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358365436] [2022-03-19 23:23:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:50,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:50,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:50,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 23:23:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:23:51,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:51,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358365436] [2022-03-19 23:23:51,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358365436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:51,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366020610] [2022-03-19 23:23:51,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:23:51,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:51,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:51,259 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:51,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-19 23:23:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:51,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 23:23:51,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:23:51,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:23:52,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366020610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:52,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:52,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 47 [2022-03-19 23:23:52,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512573345] [2022-03-19 23:23:52,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:52,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 23:23:52,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:52,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 23:23:52,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2061, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 23:23:52,036 INFO L87 Difference]: Start difference. First operand 1194 states and 1332 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:54,784 INFO L93 Difference]: Finished difference Result 1336 states and 1491 transitions. [2022-03-19 23:23:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 23:23:54,784 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-19 23:23:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:54,791 INFO L225 Difference]: With dead ends: 1336 [2022-03-19 23:23:54,791 INFO L226 Difference]: Without dead ends: 1330 [2022-03-19 23:23:54,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=289, Invalid=7021, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 23:23:54,799 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 310 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 8181 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 8239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 8181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:54,799 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 333 Invalid, 8239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 8181 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 23:23:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-03-19 23:23:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1210. [2022-03-19 23:23:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1087 states have (on average 1.1287948482060717) internal successors, (1227), 1163 states have internal predecessors, (1227), 43 states have call successors, (43), 5 states have call predecessors, (43), 79 states have return successors, (81), 41 states have call predecessors, (81), 41 states have call successors, (81) [2022-03-19 23:23:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1351 transitions. [2022-03-19 23:23:55,278 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1351 transitions. Word has length 59 [2022-03-19 23:23:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:55,278 INFO L478 AbstractCegarLoop]: Abstraction has 1210 states and 1351 transitions. [2022-03-19 23:23:55,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1351 transitions. [2022-03-19 23:23:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:23:55,287 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:55,287 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:55,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-19 23:23:55,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-19 23:23:55,497 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:55,498 INFO L85 PathProgramCache]: Analyzing trace with hash -279498742, now seen corresponding path program 92 times [2022-03-19 23:23:55,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:55,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111481011] [2022-03-19 23:23:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:55,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:55,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:55,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:55,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 23:23:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:23:55,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:23:55,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111481011] [2022-03-19 23:23:55,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111481011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:23:55,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657224175] [2022-03-19 23:23:55,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:23:55,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:55,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:23:55,919 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:23:55,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-19 23:23:56,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:23:56,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:23:56,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 23:23:56,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:23:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:23:56,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:23:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:23:56,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657224175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:23:56,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:23:56,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 47 [2022-03-19 23:23:56,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132209482] [2022-03-19 23:23:56,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:23:56,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 23:23:56,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:23:56,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 23:23:56,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2057, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 23:23:56,559 INFO L87 Difference]: Start difference. First operand 1210 states and 1351 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:59,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:23:59,195 INFO L93 Difference]: Finished difference Result 1216 states and 1356 transitions. [2022-03-19 23:23:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 23:23:59,196 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-19 23:23:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:23:59,200 INFO L225 Difference]: With dead ends: 1216 [2022-03-19 23:23:59,200 INFO L226 Difference]: Without dead ends: 1194 [2022-03-19 23:23:59,207 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=291, Invalid=6681, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 23:23:59,207 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 237 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 7424 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 7467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 7424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:23:59,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 323 Invalid, 7467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 7424 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 23:23:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-03-19 23:23:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1194. [2022-03-19 23:23:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1074 states have (on average 1.1284916201117319) internal successors, (1212), 1148 states have internal predecessors, (1212), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2022-03-19 23:23:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1333 transitions. [2022-03-19 23:23:59,683 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1333 transitions. Word has length 59 [2022-03-19 23:23:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:23:59,684 INFO L478 AbstractCegarLoop]: Abstraction has 1194 states and 1333 transitions. [2022-03-19 23:23:59,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:23:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1333 transitions. [2022-03-19 23:23:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:23:59,692 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:23:59,692 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:23:59,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-19 23:23:59,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:23:59,901 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:23:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:23:59,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2125532374, now seen corresponding path program 93 times [2022-03-19 23:23:59,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:23:59,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658578454] [2022-03-19 23:23:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:23:59,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:23:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:59,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:23:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:23:59,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:23:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:00,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 23:24:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:24:00,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:00,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658578454] [2022-03-19 23:24:00,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658578454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:00,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843278567] [2022-03-19 23:24:00,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:24:00,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:00,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:00,363 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:00,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-19 23:24:00,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 23:24:00,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:00,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:24:00,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:24:00,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:24:01,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843278567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:01,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:01,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 47 [2022-03-19 23:24:01,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586668703] [2022-03-19 23:24:01,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:01,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 23:24:01,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 23:24:01,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2053, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 23:24:01,024 INFO L87 Difference]: Start difference. First operand 1194 states and 1333 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:03,288 INFO L93 Difference]: Finished difference Result 1200 states and 1338 transitions. [2022-03-19 23:24:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 23:24:03,288 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-19 23:24:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:03,293 INFO L225 Difference]: With dead ends: 1200 [2022-03-19 23:24:03,293 INFO L226 Difference]: Without dead ends: 1176 [2022-03-19 23:24:03,299 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=293, Invalid=6349, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 23:24:03,300 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6072 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 6114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:03,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 298 Invalid, 6114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6072 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:24:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-19 23:24:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-03-19 23:24:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1059 states have (on average 1.1284230406043436) internal successors, (1195), 1131 states have internal predecessors, (1195), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (77), 39 states have call predecessors, (77), 39 states have call successors, (77) [2022-03-19 23:24:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1313 transitions. [2022-03-19 23:24:03,764 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1313 transitions. Word has length 59 [2022-03-19 23:24:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:03,764 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1313 transitions. [2022-03-19 23:24:03,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:03,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1313 transitions. [2022-03-19 23:24:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:24:03,772 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:03,772 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:03,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:03,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-19 23:24:03,986 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:03,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:03,986 INFO L85 PathProgramCache]: Analyzing trace with hash 565515146, now seen corresponding path program 94 times [2022-03-19 23:24:03,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:03,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638637364] [2022-03-19 23:24:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:03,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:04,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:04,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:04,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 23:24:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:24:04,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:04,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638637364] [2022-03-19 23:24:04,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638637364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:04,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762078497] [2022-03-19 23:24:04,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:24:04,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:04,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:04,318 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:04,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-19 23:24:04,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:24:04,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:04,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:24:04,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:24:04,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:24:04,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762078497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:04,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:04,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 47 [2022-03-19 23:24:04,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209345335] [2022-03-19 23:24:04,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:04,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 23:24:04,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:04,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 23:24:04,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 23:24:04,937 INFO L87 Difference]: Start difference. First operand 1176 states and 1313 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:06,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:06,720 INFO L93 Difference]: Finished difference Result 1182 states and 1318 transitions. [2022-03-19 23:24:06,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 23:24:06,720 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-19 23:24:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:06,725 INFO L225 Difference]: With dead ends: 1182 [2022-03-19 23:24:06,725 INFO L226 Difference]: Without dead ends: 1156 [2022-03-19 23:24:06,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=6025, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 23:24:06,732 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4797 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 4837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:06,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 273 Invalid, 4837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4797 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:24:06,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-03-19 23:24:07,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1156. [2022-03-19 23:24:07,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1042 states have (on average 1.128598848368522) internal successors, (1176), 1112 states have internal predecessors, (1176), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (75), 38 states have call predecessors, (75), 38 states have call successors, (75) [2022-03-19 23:24:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1291 transitions. [2022-03-19 23:24:07,191 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1291 transitions. Word has length 59 [2022-03-19 23:24:07,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:07,191 INFO L478 AbstractCegarLoop]: Abstraction has 1156 states and 1291 transitions. [2022-03-19 23:24:07,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:07,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1291 transitions. [2022-03-19 23:24:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:24:07,199 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:07,199 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:07,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:07,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-19 23:24:07,415 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:07,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash -532705366, now seen corresponding path program 95 times [2022-03-19 23:24:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:07,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165548754] [2022-03-19 23:24:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:07,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:07,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:07,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:07,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 23:24:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:24:07,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:07,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165548754] [2022-03-19 23:24:07,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165548754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:07,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369239704] [2022-03-19 23:24:07,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:24:07,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:07,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:07,883 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:07,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-19 23:24:07,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-19 23:24:07,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:07,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 23:24:07,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:24:08,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:24:08,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369239704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:08,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:08,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2022-03-19 23:24:08,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263746192] [2022-03-19 23:24:08,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:08,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 23:24:08,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:08,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 23:24:08,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2045, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 23:24:08,899 INFO L87 Difference]: Start difference. First operand 1156 states and 1291 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:10,804 INFO L93 Difference]: Finished difference Result 1162 states and 1296 transitions. [2022-03-19 23:24:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 23:24:10,805 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-19 23:24:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:10,809 INFO L225 Difference]: With dead ends: 1162 [2022-03-19 23:24:10,809 INFO L226 Difference]: Without dead ends: 1134 [2022-03-19 23:24:10,815 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=297, Invalid=5709, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 23:24:10,815 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 121 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3750 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 3790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:10,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 260 Invalid, 3790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3750 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 23:24:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-03-19 23:24:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1134. [2022-03-19 23:24:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1023 states have (on average 1.1290322580645162) internal successors, (1155), 1091 states have internal predecessors, (1155), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (73), 37 states have call predecessors, (73), 37 states have call successors, (73) [2022-03-19 23:24:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1267 transitions. [2022-03-19 23:24:11,264 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1267 transitions. Word has length 59 [2022-03-19 23:24:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:11,264 INFO L478 AbstractCegarLoop]: Abstraction has 1134 states and 1267 transitions. [2022-03-19 23:24:11,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1267 transitions. [2022-03-19 23:24:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:24:11,271 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:11,271 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:11,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:11,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-03-19 23:24:11,488 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1671481989, now seen corresponding path program 96 times [2022-03-19 23:24:11,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:11,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449876228] [2022-03-19 23:24:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:11,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:11,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:11,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:24:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-19 23:24:11,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449876228] [2022-03-19 23:24:11,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449876228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966909702] [2022-03-19 23:24:11,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:24:11,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:11,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:11,777 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:11,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-19 23:24:11,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 23:24:11,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:11,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 23:24:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-19 23:24:12,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-19 23:24:12,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966909702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:12,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:12,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 51 [2022-03-19 23:24:12,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537987443] [2022-03-19 23:24:12,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:12,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:24:12,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:24:12,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:24:12,777 INFO L87 Difference]: Start difference. First operand 1134 states and 1267 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:14,707 INFO L93 Difference]: Finished difference Result 1238 states and 1393 transitions. [2022-03-19 23:24:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:24:14,707 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-03-19 23:24:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:14,723 INFO L225 Difference]: With dead ends: 1238 [2022-03-19 23:24:14,723 INFO L226 Difference]: Without dead ends: 1219 [2022-03-19 23:24:14,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=489, Invalid=5673, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 23:24:14,732 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 771 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:14,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 212 Invalid, 3461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3379 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:24:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-03-19 23:24:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1214. [2022-03-19 23:24:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1070 states have (on average 1.122429906542056) internal successors, (1201), 1160 states have internal predecessors, (1201), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2022-03-19 23:24:15,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1357 transitions. [2022-03-19 23:24:15,196 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1357 transitions. Word has length 59 [2022-03-19 23:24:15,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:15,196 INFO L478 AbstractCegarLoop]: Abstraction has 1214 states and 1357 transitions. [2022-03-19 23:24:15,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1357 transitions. [2022-03-19 23:24:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:24:15,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:15,205 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:15,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:15,422 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-19 23:24:15,422 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1489237770, now seen corresponding path program 97 times [2022-03-19 23:24:15,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:15,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987420298] [2022-03-19 23:24:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:15,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:15,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:15,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:15,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 23:24:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:24:15,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:15,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987420298] [2022-03-19 23:24:15,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987420298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:15,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139811178] [2022-03-19 23:24:15,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:24:15,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:15,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:15,838 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:15,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-19 23:24:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:15,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 23:24:15,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:24:16,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:24:16,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139811178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:16,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:16,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 47 [2022-03-19 23:24:16,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342777221] [2022-03-19 23:24:16,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:16,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 23:24:16,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 23:24:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2041, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 23:24:16,832 INFO L87 Difference]: Start difference. First operand 1214 states and 1357 transitions. Second operand has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:18,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:18,410 INFO L93 Difference]: Finished difference Result 1232 states and 1379 transitions. [2022-03-19 23:24:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 23:24:18,410 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-03-19 23:24:18,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:18,417 INFO L225 Difference]: With dead ends: 1232 [2022-03-19 23:24:18,417 INFO L226 Difference]: Without dead ends: 1213 [2022-03-19 23:24:18,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=299, Invalid=5401, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 23:24:18,425 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:18,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 203 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:24:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-03-19 23:24:18,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1208. [2022-03-19 23:24:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1064 states have (on average 1.1240601503759398) internal successors, (1196), 1154 states have internal predecessors, (1196), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2022-03-19 23:24:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1352 transitions. [2022-03-19 23:24:18,883 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1352 transitions. Word has length 59 [2022-03-19 23:24:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:18,883 INFO L478 AbstractCegarLoop]: Abstraction has 1208 states and 1352 transitions. [2022-03-19 23:24:18,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 41 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1352 transitions. [2022-03-19 23:24:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:24:18,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:18,892 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:18,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-19 23:24:19,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:19,107 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash 930505855, now seen corresponding path program 98 times [2022-03-19 23:24:19,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:19,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135973475] [2022-03-19 23:24:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:19,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:19,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:19,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:24:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-19 23:24:19,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:19,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135973475] [2022-03-19 23:24:19,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135973475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:19,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972828758] [2022-03-19 23:24:19,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:24:19,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:19,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:19,397 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:19,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-19 23:24:19,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:24:19,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:19,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 23:24:19,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-19 23:24:19,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-19 23:24:20,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972828758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:20,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:20,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 51 [2022-03-19 23:24:20,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281014166] [2022-03-19 23:24:20,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:20,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:24:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:20,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:24:20,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:24:20,270 INFO L87 Difference]: Start difference. First operand 1208 states and 1352 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:22,342 INFO L93 Difference]: Finished difference Result 1222 states and 1365 transitions. [2022-03-19 23:24:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:24:22,355 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-03-19 23:24:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:22,360 INFO L225 Difference]: With dead ends: 1222 [2022-03-19 23:24:22,361 INFO L226 Difference]: Without dead ends: 1194 [2022-03-19 23:24:22,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=489, Invalid=5673, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 23:24:22,368 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 820 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3642 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 3716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:22,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 233 Invalid, 3716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3642 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:24:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-03-19 23:24:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1192. [2022-03-19 23:24:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1048 states have (on average 1.1240458015267176) internal successors, (1178), 1138 states have internal predecessors, (1178), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (96), 48 states have call predecessors, (96), 48 states have call successors, (96) [2022-03-19 23:24:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1324 transitions. [2022-03-19 23:24:22,830 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1324 transitions. Word has length 59 [2022-03-19 23:24:22,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:22,830 INFO L478 AbstractCegarLoop]: Abstraction has 1192 states and 1324 transitions. [2022-03-19 23:24:22,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 50 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1324 transitions. [2022-03-19 23:24:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 23:24:22,839 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:22,840 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:22,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-19 23:24:23,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-19 23:24:23,055 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:23,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1508010897, now seen corresponding path program 99 times [2022-03-19 23:24:23,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:23,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056513516] [2022-03-19 23:24:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:23,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:23,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:23,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:23,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 23:24:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:23,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056513516] [2022-03-19 23:24:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056513516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147281790] [2022-03-19 23:24:23,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:24:23,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:23,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:23,565 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:23,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-19 23:24:23,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-19 23:24:23,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:23,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 23:24:23,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:24,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:26,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147281790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:26,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:26,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-03-19 23:24:26,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484219226] [2022-03-19 23:24:26,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:26,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-19 23:24:26,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-19 23:24:26,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6855, Unknown=0, NotChecked=0, Total=7140 [2022-03-19 23:24:26,069 INFO L87 Difference]: Start difference. First operand 1192 states and 1324 transitions. Second operand has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:32,902 INFO L93 Difference]: Finished difference Result 1336 states and 1493 transitions. [2022-03-19 23:24:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 23:24:32,902 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-03-19 23:24:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:32,916 INFO L225 Difference]: With dead ends: 1336 [2022-03-19 23:24:32,916 INFO L226 Difference]: Without dead ends: 1322 [2022-03-19 23:24:32,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1076, Invalid=17556, Unknown=0, NotChecked=0, Total=18632 [2022-03-19 23:24:32,926 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 2065 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 9689 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2070 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 9914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 9689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:32,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2070 Valid, 376 Invalid, 9914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 9689 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-19 23:24:32,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-03-19 23:24:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1313. [2022-03-19 23:24:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1154 states have (on average 1.123050259965338) internal successors, (1296), 1254 states have internal predecessors, (1296), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (111), 53 states have call predecessors, (111), 53 states have call successors, (111) [2022-03-19 23:24:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1462 transitions. [2022-03-19 23:24:33,463 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1462 transitions. Word has length 60 [2022-03-19 23:24:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:33,463 INFO L478 AbstractCegarLoop]: Abstraction has 1313 states and 1462 transitions. [2022-03-19 23:24:33,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1462 transitions. [2022-03-19 23:24:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 23:24:33,473 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:33,474 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:33,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:33,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:33,677 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:33,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:33,677 INFO L85 PathProgramCache]: Analyzing trace with hash 368244332, now seen corresponding path program 100 times [2022-03-19 23:24:33,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:33,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93151063] [2022-03-19 23:24:33,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:33,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:33,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:33,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:33,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:24:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:34,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:34,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93151063] [2022-03-19 23:24:34,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93151063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:34,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981214906] [2022-03-19 23:24:34,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:24:34,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:34,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:34,203 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:34,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-19 23:24:34,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:24:34,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:34,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 23:24:34,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:35,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:36,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981214906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:36,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:36,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-03-19 23:24:36,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332131823] [2022-03-19 23:24:36,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:36,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-19 23:24:36,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-19 23:24:36,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6855, Unknown=0, NotChecked=0, Total=7140 [2022-03-19 23:24:36,836 INFO L87 Difference]: Start difference. First operand 1313 states and 1462 transitions. Second operand has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:42,956 INFO L93 Difference]: Finished difference Result 1328 states and 1477 transitions. [2022-03-19 23:24:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 23:24:42,956 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-03-19 23:24:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:42,962 INFO L225 Difference]: With dead ends: 1328 [2022-03-19 23:24:42,963 INFO L226 Difference]: Without dead ends: 1316 [2022-03-19 23:24:42,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1076, Invalid=17556, Unknown=0, NotChecked=0, Total=18632 [2022-03-19 23:24:42,973 INFO L913 BasicCegarLoop]: 148 mSDtfsCounter, 2105 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9489 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2130 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 9690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 9489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:42,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2130 Valid, 375 Invalid, 9690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 9489 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-19 23:24:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-03-19 23:24:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1314. [2022-03-19 23:24:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1155 states have (on average 1.122943722943723) internal successors, (1297), 1255 states have internal predecessors, (1297), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2022-03-19 23:24:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1457 transitions. [2022-03-19 23:24:43,518 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1457 transitions. Word has length 60 [2022-03-19 23:24:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:43,518 INFO L478 AbstractCegarLoop]: Abstraction has 1314 states and 1457 transitions. [2022-03-19 23:24:43,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.388235294117647) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1457 transitions. [2022-03-19 23:24:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 23:24:43,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:43,529 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:43,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:43,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:43,746 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1252044946, now seen corresponding path program 101 times [2022-03-19 23:24:43,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:43,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728044890] [2022-03-19 23:24:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:43,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:43,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:43,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:43,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 23:24:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:24:43,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:43,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728044890] [2022-03-19 23:24:43,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728044890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:43,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341936713] [2022-03-19 23:24:43,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:24:43,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:43,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:43,820 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:43,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-19 23:24:43,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:24:43,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:43,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:24:43,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:24:44,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:24:44,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341936713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:44,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:44,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 25 [2022-03-19 23:24:44,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685655798] [2022-03-19 23:24:44,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:44,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 23:24:44,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 23:24:44,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-03-19 23:24:44,065 INFO L87 Difference]: Start difference. First operand 1314 states and 1457 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:45,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:45,010 INFO L93 Difference]: Finished difference Result 1985 states and 2169 transitions. [2022-03-19 23:24:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 23:24:45,010 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-03-19 23:24:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:45,028 INFO L225 Difference]: With dead ends: 1985 [2022-03-19 23:24:45,028 INFO L226 Difference]: Without dead ends: 1315 [2022-03-19 23:24:45,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1129, Invalid=2531, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 23:24:45,042 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 99 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:45,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 103 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-03-19 23:24:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1307. [2022-03-19 23:24:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1154 states have (on average 1.1195840554592722) internal successors, (1292), 1250 states have internal predecessors, (1292), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2022-03-19 23:24:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1444 transitions. [2022-03-19 23:24:45,610 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1444 transitions. Word has length 60 [2022-03-19 23:24:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:45,610 INFO L478 AbstractCegarLoop]: Abstraction has 1307 states and 1444 transitions. [2022-03-19 23:24:45,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1444 transitions. [2022-03-19 23:24:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 23:24:45,621 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:45,621 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:45,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:45,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:45,838 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:45,838 INFO L85 PathProgramCache]: Analyzing trace with hash 476370573, now seen corresponding path program 102 times [2022-03-19 23:24:45,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:45,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329363234] [2022-03-19 23:24:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:45,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:45,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:45,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:24:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:24:46,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:46,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329363234] [2022-03-19 23:24:46,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329363234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:46,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105514525] [2022-03-19 23:24:46,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:24:46,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:46,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:46,001 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:46,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-19 23:24:46,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 23:24:46,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:24:46,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:24:46,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:24:46,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105514525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:46,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:46,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 25 [2022-03-19 23:24:46,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114411433] [2022-03-19 23:24:46,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:46,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 23:24:46,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:46,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 23:24:46,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2022-03-19 23:24:46,346 INFO L87 Difference]: Start difference. First operand 1307 states and 1444 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:24:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:47,412 INFO L93 Difference]: Finished difference Result 1365 states and 1514 transitions. [2022-03-19 23:24:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 23:24:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-03-19 23:24:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:47,418 INFO L225 Difference]: With dead ends: 1365 [2022-03-19 23:24:47,418 INFO L226 Difference]: Without dead ends: 1320 [2022-03-19 23:24:47,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1129, Invalid=2531, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 23:24:47,428 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 135 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:47,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 76 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:24:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-03-19 23:24:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-03-19 23:24:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1167 states have (on average 1.1182519280205656) internal successors, (1305), 1263 states have internal predecessors, (1305), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2022-03-19 23:24:47,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1457 transitions. [2022-03-19 23:24:47,989 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1457 transitions. Word has length 60 [2022-03-19 23:24:47,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:47,989 INFO L478 AbstractCegarLoop]: Abstraction has 1320 states and 1457 transitions. [2022-03-19 23:24:47,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:24:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1457 transitions. [2022-03-19 23:24:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 23:24:47,999 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:47,999 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:48,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:48,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-19 23:24:48,216 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1806167277, now seen corresponding path program 103 times [2022-03-19 23:24:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079701117] [2022-03-19 23:24:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:48,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:48,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:48,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:48,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:24:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:24:48,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079701117] [2022-03-19 23:24:48,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079701117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229061916] [2022-03-19 23:24:48,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:24:48,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:48,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:48,869 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:48,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-19 23:24:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:48,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 23:24:48,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:24:49,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:24:49,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229061916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:49,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:49,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 49 [2022-03-19 23:24:49,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554004273] [2022-03-19 23:24:49,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:49,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 23:24:49,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:49,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 23:24:49,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2247, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 23:24:49,577 INFO L87 Difference]: Start difference. First operand 1320 states and 1457 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:52,683 INFO L93 Difference]: Finished difference Result 1470 states and 1624 transitions. [2022-03-19 23:24:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 23:24:52,683 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-19 23:24:52,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:52,693 INFO L225 Difference]: With dead ends: 1470 [2022-03-19 23:24:52,693 INFO L226 Difference]: Without dead ends: 1464 [2022-03-19 23:24:52,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=301, Invalid=7709, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 23:24:52,704 INFO L913 BasicCegarLoop]: 149 mSDtfsCounter, 331 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 10084 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 10146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 10084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:52,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 371 Invalid, 10146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 10084 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 23:24:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-19 23:24:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1336. [2022-03-19 23:24:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1180 states have (on average 1.11864406779661) internal successors, (1320), 1278 states have internal predecessors, (1320), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (102), 52 states have call predecessors, (102), 52 states have call successors, (102) [2022-03-19 23:24:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 1476 transitions. [2022-03-19 23:24:53,291 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 1476 transitions. Word has length 61 [2022-03-19 23:24:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:53,291 INFO L478 AbstractCegarLoop]: Abstraction has 1336 states and 1476 transitions. [2022-03-19 23:24:53,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:53,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 1476 transitions. [2022-03-19 23:24:53,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 23:24:53,305 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:53,305 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:53,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:53,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:53,522 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:53,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:53,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1360021805, now seen corresponding path program 104 times [2022-03-19 23:24:53,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:53,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003197096] [2022-03-19 23:24:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:53,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:53,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:53,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:53,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:24:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:24:53,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:53,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003197096] [2022-03-19 23:24:53,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003197096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:53,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635998802] [2022-03-19 23:24:53,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:24:53,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:53,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:53,968 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:53,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-19 23:24:54,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:24:54,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:54,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 23:24:54,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:24:54,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:24:54,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635998802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:54,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:54,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 49 [2022-03-19 23:24:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611742508] [2022-03-19 23:24:54,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:54,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 23:24:54,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 23:24:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2243, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 23:24:54,554 INFO L87 Difference]: Start difference. First operand 1336 states and 1476 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:57,722 INFO L93 Difference]: Finished difference Result 1342 states and 1481 transitions. [2022-03-19 23:24:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 23:24:57,723 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-19 23:24:57,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:57,729 INFO L225 Difference]: With dead ends: 1342 [2022-03-19 23:24:57,729 INFO L226 Difference]: Without dead ends: 1320 [2022-03-19 23:24:57,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=303, Invalid=7353, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 23:24:57,744 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 252 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 8622 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 8665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 8622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:57,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 346 Invalid, 8665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 8622 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 23:24:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-03-19 23:24:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-03-19 23:24:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1167 states have (on average 1.1182519280205656) internal successors, (1305), 1263 states have internal predecessors, (1305), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (100), 51 states have call predecessors, (100), 51 states have call successors, (100) [2022-03-19 23:24:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1458 transitions. [2022-03-19 23:24:58,369 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1458 transitions. Word has length 61 [2022-03-19 23:24:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:58,369 INFO L478 AbstractCegarLoop]: Abstraction has 1320 states and 1458 transitions. [2022-03-19 23:24:58,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1458 transitions. [2022-03-19 23:24:58,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 23:24:58,380 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:58,380 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:58,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:58,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:58,595 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:58,596 INFO L85 PathProgramCache]: Analyzing trace with hash -165892883, now seen corresponding path program 105 times [2022-03-19 23:24:58,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:58,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255823341] [2022-03-19 23:24:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:58,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:58,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:58,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:58,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:24:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:24:59,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:59,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255823341] [2022-03-19 23:24:59,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255823341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:59,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153292184] [2022-03-19 23:24:59,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:24:59,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:59,043 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:59,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-19 23:24:59,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-19 23:24:59,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:59,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 23:24:59,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:24:59,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:24:59,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153292184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:59,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:59,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 49 [2022-03-19 23:24:59,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378562518] [2022-03-19 23:24:59,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:59,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 23:24:59,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:59,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 23:24:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2239, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 23:24:59,771 INFO L87 Difference]: Start difference. First operand 1320 states and 1458 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:02,347 INFO L93 Difference]: Finished difference Result 1326 states and 1463 transitions. [2022-03-19 23:25:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 23:25:02,347 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-19 23:25:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:02,353 INFO L225 Difference]: With dead ends: 1326 [2022-03-19 23:25:02,353 INFO L226 Difference]: Without dead ends: 1302 [2022-03-19 23:25:02,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=305, Invalid=7005, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 23:25:02,380 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 213 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7374 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 7416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 7374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:02,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 326 Invalid, 7416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 7374 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 23:25:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-03-19 23:25:02,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2022-03-19 23:25:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1152 states have (on average 1.1180555555555556) internal successors, (1288), 1246 states have internal predecessors, (1288), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (98), 50 states have call predecessors, (98), 50 states have call successors, (98) [2022-03-19 23:25:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1438 transitions. [2022-03-19 23:25:02,946 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1438 transitions. Word has length 61 [2022-03-19 23:25:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:02,946 INFO L478 AbstractCegarLoop]: Abstraction has 1302 states and 1438 transitions. [2022-03-19 23:25:02,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1438 transitions. [2022-03-19 23:25:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 23:25:02,956 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:02,956 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:02,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-19 23:25:03,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-19 23:25:03,171 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:03,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:03,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1490253523, now seen corresponding path program 106 times [2022-03-19 23:25:03,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:03,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479564513] [2022-03-19 23:25:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:03,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:03,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:03,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:03,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:25:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:25:03,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479564513] [2022-03-19 23:25:03,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479564513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764798985] [2022-03-19 23:25:03,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:25:03,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:03,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:03,626 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:03,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-19 23:25:03,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:25:03,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:25:03,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:25:04,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:25:04,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764798985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:04,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:04,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 49 [2022-03-19 23:25:04,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489218607] [2022-03-19 23:25:04,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:04,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 23:25:04,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:04,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 23:25:04,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 23:25:04,330 INFO L87 Difference]: Start difference. First operand 1302 states and 1438 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:06,685 INFO L93 Difference]: Finished difference Result 1308 states and 1443 transitions. [2022-03-19 23:25:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 23:25:06,685 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-19 23:25:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:06,690 INFO L225 Difference]: With dead ends: 1308 [2022-03-19 23:25:06,690 INFO L226 Difference]: Without dead ends: 1282 [2022-03-19 23:25:06,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=307, Invalid=6665, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 23:25:06,705 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 174 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5425 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 5465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:06,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 281 Invalid, 5465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5425 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:25:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-03-19 23:25:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1282. [2022-03-19 23:25:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1135 states have (on average 1.1180616740088105) internal successors, (1269), 1227 states have internal predecessors, (1269), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (96), 49 states have call predecessors, (96), 49 states have call successors, (96) [2022-03-19 23:25:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1416 transitions. [2022-03-19 23:25:07,252 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1416 transitions. Word has length 61 [2022-03-19 23:25:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:07,252 INFO L478 AbstractCegarLoop]: Abstraction has 1282 states and 1416 transitions. [2022-03-19 23:25:07,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1416 transitions. [2022-03-19 23:25:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 23:25:07,262 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:07,262 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:07,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-19 23:25:07,478 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-19 23:25:07,479 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:07,479 INFO L85 PathProgramCache]: Analyzing trace with hash 779054317, now seen corresponding path program 107 times [2022-03-19 23:25:07,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:07,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099669543] [2022-03-19 23:25:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:07,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:07,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:07,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:07,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:25:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:25:07,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:07,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099669543] [2022-03-19 23:25:07,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099669543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:07,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900247829] [2022-03-19 23:25:07,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:25:07,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:07,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:07,976 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:07,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-19 23:25:08,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-19 23:25:08,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:08,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:25:08,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:25:08,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:25:09,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900247829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:09,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:09,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 49 [2022-03-19 23:25:09,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348220450] [2022-03-19 23:25:09,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:09,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 23:25:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 23:25:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2231, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 23:25:09,069 INFO L87 Difference]: Start difference. First operand 1282 states and 1416 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:11,079 INFO L93 Difference]: Finished difference Result 1288 states and 1421 transitions. [2022-03-19 23:25:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 23:25:11,079 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-19 23:25:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:11,084 INFO L225 Difference]: With dead ends: 1288 [2022-03-19 23:25:11,084 INFO L226 Difference]: Without dead ends: 1260 [2022-03-19 23:25:11,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=309, Invalid=6333, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 23:25:11,093 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 135 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4416 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 4454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:11,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 266 Invalid, 4454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4416 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 23:25:11,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-03-19 23:25:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1260. [2022-03-19 23:25:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1116 states have (on average 1.118279569892473) internal successors, (1248), 1206 states have internal predecessors, (1248), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (94), 48 states have call predecessors, (94), 48 states have call successors, (94) [2022-03-19 23:25:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1392 transitions. [2022-03-19 23:25:11,630 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1392 transitions. Word has length 61 [2022-03-19 23:25:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:11,630 INFO L478 AbstractCegarLoop]: Abstraction has 1260 states and 1392 transitions. [2022-03-19 23:25:11,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:11,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1392 transitions. [2022-03-19 23:25:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 23:25:11,639 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:11,639 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:11,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-19 23:25:11,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:11,851 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash 896190765, now seen corresponding path program 108 times [2022-03-19 23:25:11,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:11,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570852280] [2022-03-19 23:25:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:11,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:11,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:11,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:12,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:25:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:25:12,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:12,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570852280] [2022-03-19 23:25:12,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570852280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:12,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502740915] [2022-03-19 23:25:12,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:25:12,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:12,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:12,330 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:12,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-19 23:25:12,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 23:25:12,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:12,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 23:25:12,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:25:13,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:25:13,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502740915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:13,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:13,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 49 [2022-03-19 23:25:13,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059308617] [2022-03-19 23:25:13,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:13,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 23:25:13,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:13,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 23:25:13,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 23:25:13,439 INFO L87 Difference]: Start difference. First operand 1260 states and 1392 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:14,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:14,934 INFO L93 Difference]: Finished difference Result 1266 states and 1397 transitions. [2022-03-19 23:25:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 23:25:14,935 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-19 23:25:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:14,940 INFO L225 Difference]: With dead ends: 1266 [2022-03-19 23:25:14,940 INFO L226 Difference]: Without dead ends: 1236 [2022-03-19 23:25:14,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=311, Invalid=6009, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 23:25:14,948 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3040 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:14,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 231 Invalid, 3076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3040 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:25:14,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-03-19 23:25:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1236. [2022-03-19 23:25:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1095 states have (on average 1.1187214611872147) internal successors, (1225), 1183 states have internal predecessors, (1225), 49 states have call successors, (49), 5 states have call predecessors, (49), 91 states have return successors, (92), 47 states have call predecessors, (92), 47 states have call successors, (92) [2022-03-19 23:25:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1366 transitions. [2022-03-19 23:25:15,467 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1366 transitions. Word has length 61 [2022-03-19 23:25:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:15,467 INFO L478 AbstractCegarLoop]: Abstraction has 1236 states and 1366 transitions. [2022-03-19 23:25:15,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1366 transitions. [2022-03-19 23:25:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 23:25:15,475 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:15,476 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:15,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:15,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:15,677 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:15,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1063244563, now seen corresponding path program 109 times [2022-03-19 23:25:15,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:15,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794079607] [2022-03-19 23:25:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:15,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:15,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:15,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:25:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:25:16,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:16,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794079607] [2022-03-19 23:25:16,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794079607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:16,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908839393] [2022-03-19 23:25:16,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:25:16,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:16,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:16,015 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:16,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-19 23:25:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:16,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 23:25:16,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:25:16,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:25:16,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908839393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:16,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:16,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 49 [2022-03-19 23:25:16,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778544650] [2022-03-19 23:25:16,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:16,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 23:25:16,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 23:25:16,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 23:25:16,991 INFO L87 Difference]: Start difference. First operand 1236 states and 1366 transitions. Second operand has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:18,209 INFO L93 Difference]: Finished difference Result 1254 states and 1387 transitions. [2022-03-19 23:25:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 23:25:18,210 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-03-19 23:25:18,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:18,218 INFO L225 Difference]: With dead ends: 1254 [2022-03-19 23:25:18,218 INFO L226 Difference]: Without dead ends: 1248 [2022-03-19 23:25:18,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=5693, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 23:25:18,226 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:18,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 213 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:25:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-03-19 23:25:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1246. [2022-03-19 23:25:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1102 states have (on average 1.1197822141560798) internal successors, (1234), 1192 states have internal predecessors, (1234), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (95), 48 states have call predecessors, (95), 48 states have call successors, (95) [2022-03-19 23:25:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1379 transitions. [2022-03-19 23:25:18,755 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1379 transitions. Word has length 61 [2022-03-19 23:25:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:18,755 INFO L478 AbstractCegarLoop]: Abstraction has 1246 states and 1379 transitions. [2022-03-19 23:25:18,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.326086956521739) internal successors, (61), 43 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1379 transitions. [2022-03-19 23:25:18,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 23:25:18,765 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:18,765 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:18,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-19 23:25:18,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-19 23:25:18,975 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash -862861684, now seen corresponding path program 110 times [2022-03-19 23:25:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:18,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874966744] [2022-03-19 23:25:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:18,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:19,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:19,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:19,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:25:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:25:19,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:19,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874966744] [2022-03-19 23:25:19,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874966744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:19,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081084294] [2022-03-19 23:25:19,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:25:19,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:19,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:19,593 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:19,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-19 23:25:19,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:25:19,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:19,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 23:25:19,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:25:20,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:25:22,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081084294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:22,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:22,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 91 [2022-03-19 23:25:22,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255123607] [2022-03-19 23:25:22,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:22,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-19 23:25:22,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-19 23:25:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=7884, Unknown=0, NotChecked=0, Total=8190 [2022-03-19 23:25:22,491 INFO L87 Difference]: Start difference. First operand 1246 states and 1379 transitions. Second operand has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:28,445 INFO L93 Difference]: Finished difference Result 1392 states and 1550 transitions. [2022-03-19 23:25:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 23:25:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-03-19 23:25:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:28,463 INFO L225 Difference]: With dead ends: 1392 [2022-03-19 23:25:28,463 INFO L226 Difference]: Without dead ends: 1378 [2022-03-19 23:25:28,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1200, Invalid=20262, Unknown=0, NotChecked=0, Total=21462 [2022-03-19 23:25:28,474 INFO L913 BasicCegarLoop]: 154 mSDtfsCounter, 2415 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 11131 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2420 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 11387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 11131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:28,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2420 Valid, 411 Invalid, 11387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 11131 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 23:25:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-03-19 23:25:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1369. [2022-03-19 23:25:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1210 states have (on average 1.1190082644628099) internal successors, (1354), 1310 states have internal predecessors, (1354), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (110), 53 states have call predecessors, (110), 53 states have call successors, (110) [2022-03-19 23:25:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1519 transitions. [2022-03-19 23:25:29,078 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1519 transitions. Word has length 62 [2022-03-19 23:25:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:29,079 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 1519 transitions. [2022-03-19 23:25:29,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1519 transitions. [2022-03-19 23:25:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 23:25:29,089 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:29,089 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:29,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-19 23:25:29,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:29,302 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1466475567, now seen corresponding path program 111 times [2022-03-19 23:25:29,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:29,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826011579] [2022-03-19 23:25:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:29,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:29,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:29,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:29,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 23:25:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:25:29,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:29,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826011579] [2022-03-19 23:25:29,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826011579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:29,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122103054] [2022-03-19 23:25:29,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:25:29,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:29,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:29,814 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:29,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-19 23:25:29,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-19 23:25:29,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 23:25:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:25:30,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:25:32,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122103054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:32,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:32,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 91 [2022-03-19 23:25:32,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327680436] [2022-03-19 23:25:32,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:32,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-19 23:25:32,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-19 23:25:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=7884, Unknown=0, NotChecked=0, Total=8190 [2022-03-19 23:25:32,318 INFO L87 Difference]: Start difference. First operand 1369 states and 1519 transitions. Second operand has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:38,808 INFO L93 Difference]: Finished difference Result 1384 states and 1534 transitions. [2022-03-19 23:25:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 23:25:38,808 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-03-19 23:25:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:38,815 INFO L225 Difference]: With dead ends: 1384 [2022-03-19 23:25:38,815 INFO L226 Difference]: Without dead ends: 1372 [2022-03-19 23:25:38,825 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1200, Invalid=20262, Unknown=0, NotChecked=0, Total=21462 [2022-03-19 23:25:38,825 INFO L913 BasicCegarLoop]: 158 mSDtfsCounter, 2395 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 10619 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 10849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 10619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:38,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 395 Invalid, 10849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 10619 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-19 23:25:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-03-19 23:25:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1370. [2022-03-19 23:25:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1211 states have (on average 1.1189099917423617) internal successors, (1355), 1311 states have internal predecessors, (1355), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-03-19 23:25:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1514 transitions. [2022-03-19 23:25:39,456 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1514 transitions. Word has length 62 [2022-03-19 23:25:39,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:39,456 INFO L478 AbstractCegarLoop]: Abstraction has 1370 states and 1514 transitions. [2022-03-19 23:25:39,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 90 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:39,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1514 transitions. [2022-03-19 23:25:39,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 23:25:39,468 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:39,468 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:39,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-19 23:25:39,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:39,675 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:39,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:39,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1546673523, now seen corresponding path program 112 times [2022-03-19 23:25:39,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:39,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445347497] [2022-03-19 23:25:39,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:39,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:39,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:39,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:39,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:25:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:25:39,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:39,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445347497] [2022-03-19 23:25:39,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445347497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:39,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681584611] [2022-03-19 23:25:39,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:25:39,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:39,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:39,794 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:39,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-19 23:25:39,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:25:39,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:39,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:25:39,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:25:40,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:25:40,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681584611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:40,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:40,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-03-19 23:25:40,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834452164] [2022-03-19 23:25:40,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:40,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 23:25:40,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 23:25:40,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-03-19 23:25:40,114 INFO L87 Difference]: Start difference. First operand 1370 states and 1514 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:25:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:41,362 INFO L93 Difference]: Finished difference Result 1616 states and 1803 transitions. [2022-03-19 23:25:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 23:25:41,363 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2022-03-19 23:25:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:41,371 INFO L225 Difference]: With dead ends: 1616 [2022-03-19 23:25:41,371 INFO L226 Difference]: Without dead ends: 1554 [2022-03-19 23:25:41,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1216, Invalid=3754, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 23:25:41,385 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:41,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 103 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-03-19 23:25:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1512. [2022-03-19 23:25:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1353 states have (on average 1.1175166297117516) internal successors, (1512), 1453 states have internal predecessors, (1512), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-03-19 23:25:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1671 transitions. [2022-03-19 23:25:42,129 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1671 transitions. Word has length 62 [2022-03-19 23:25:42,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:42,129 INFO L478 AbstractCegarLoop]: Abstraction has 1512 states and 1671 transitions. [2022-03-19 23:25:42,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:25:42,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1671 transitions. [2022-03-19 23:25:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 23:25:42,143 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:42,143 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:42,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:42,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-03-19 23:25:42,355 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:42,356 INFO L85 PathProgramCache]: Analyzing trace with hash 494600014, now seen corresponding path program 113 times [2022-03-19 23:25:42,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:42,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373935477] [2022-03-19 23:25:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:42,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:42,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 23:25:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:25:42,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:42,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373935477] [2022-03-19 23:25:42,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373935477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:42,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346237453] [2022-03-19 23:25:42,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:25:42,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:42,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:42,462 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:42,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-19 23:25:42,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:25:42,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:42,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:25:42,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:25:42,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 23:25:42,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346237453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:42,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:42,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-03-19 23:25:42,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676365823] [2022-03-19 23:25:42,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:42,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 23:25:42,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 23:25:42,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-03-19 23:25:42,804 INFO L87 Difference]: Start difference. First operand 1512 states and 1671 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:44,382 INFO L93 Difference]: Finished difference Result 2555 states and 2807 transitions. [2022-03-19 23:25:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 23:25:44,382 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-03-19 23:25:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:44,414 INFO L225 Difference]: With dead ends: 2555 [2022-03-19 23:25:44,414 INFO L226 Difference]: Without dead ends: 1696 [2022-03-19 23:25:44,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1216, Invalid=3754, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 23:25:44,431 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 206 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:44,431 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 93 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-03-19 23:25:45,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1654. [2022-03-19 23:25:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1495 states have (on average 1.1163879598662207) internal successors, (1669), 1595 states have internal predecessors, (1669), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2022-03-19 23:25:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1828 transitions. [2022-03-19 23:25:45,245 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1828 transitions. Word has length 62 [2022-03-19 23:25:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:45,245 INFO L478 AbstractCegarLoop]: Abstraction has 1654 states and 1828 transitions. [2022-03-19 23:25:45,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1828 transitions. [2022-03-19 23:25:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 23:25:45,259 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:45,260 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:45,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:45,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:45,475 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:45,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1491597194, now seen corresponding path program 114 times [2022-03-19 23:25:45,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:45,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548997011] [2022-03-19 23:25:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:45,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:45,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:45,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:45,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 23:25:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:25:46,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:46,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548997011] [2022-03-19 23:25:46,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548997011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:46,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225693142] [2022-03-19 23:25:46,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:25:46,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:46,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:46,260 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:46,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-19 23:25:46,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 23:25:46,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:46,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 23:25:46,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:25:46,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:25:47,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225693142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:47,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:47,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 51 [2022-03-19 23:25:47,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811572052] [2022-03-19 23:25:47,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:47,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:25:47,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:47,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:25:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2441, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:25:47,056 INFO L87 Difference]: Start difference. First operand 1654 states and 1828 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:50,868 INFO L93 Difference]: Finished difference Result 1824 states and 2017 transitions. [2022-03-19 23:25:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 23:25:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-19 23:25:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:50,881 INFO L225 Difference]: With dead ends: 1824 [2022-03-19 23:25:50,881 INFO L226 Difference]: Without dead ends: 1818 [2022-03-19 23:25:50,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=313, Invalid=8429, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 23:25:50,895 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 354 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 11129 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 11193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 11129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:50,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 388 Invalid, 11193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 11129 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 23:25:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-03-19 23:25:51,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1670. [2022-03-19 23:25:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1508 states have (on average 1.1167108753315649) internal successors, (1684), 1610 states have internal predecessors, (1684), 56 states have call successors, (56), 5 states have call predecessors, (56), 105 states have return successors, (107), 54 states have call predecessors, (107), 54 states have call successors, (107) [2022-03-19 23:25:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 1847 transitions. [2022-03-19 23:25:51,755 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 1847 transitions. Word has length 63 [2022-03-19 23:25:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:51,755 INFO L478 AbstractCegarLoop]: Abstraction has 1670 states and 1847 transitions. [2022-03-19 23:25:51,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 1847 transitions. [2022-03-19 23:25:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 23:25:51,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:51,770 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:51,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-19 23:25:51,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-19 23:25:51,976 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:51,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:51,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1845015914, now seen corresponding path program 115 times [2022-03-19 23:25:51,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:51,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059246354] [2022-03-19 23:25:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:51,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:52,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:52,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:52,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 23:25:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:25:52,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:52,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059246354] [2022-03-19 23:25:52,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059246354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:52,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688496573] [2022-03-19 23:25:52,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:25:52,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:52,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:52,650 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:52,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-19 23:25:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:52,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 23:25:52,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:25:53,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:25:53,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688496573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:53,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:53,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 51 [2022-03-19 23:25:53,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482056996] [2022-03-19 23:25:53,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:53,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:25:53,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:53,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:25:53,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2437, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:25:53,632 INFO L87 Difference]: Start difference. First operand 1670 states and 1847 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:57,115 INFO L93 Difference]: Finished difference Result 1676 states and 1852 transitions. [2022-03-19 23:25:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 23:25:57,116 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-19 23:25:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:57,128 INFO L225 Difference]: With dead ends: 1676 [2022-03-19 23:25:57,128 INFO L226 Difference]: Without dead ends: 1654 [2022-03-19 23:25:57,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=315, Invalid=8057, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 23:25:57,143 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 276 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 9128 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 9175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 9128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:57,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 353 Invalid, 9175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 9128 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 23:25:57,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-03-19 23:25:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1654. [2022-03-19 23:25:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1495 states have (on average 1.1163879598662207) internal successors, (1669), 1595 states have internal predecessors, (1669), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2022-03-19 23:25:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1829 transitions. [2022-03-19 23:25:58,003 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1829 transitions. Word has length 63 [2022-03-19 23:25:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:58,004 INFO L478 AbstractCegarLoop]: Abstraction has 1654 states and 1829 transitions. [2022-03-19 23:25:58,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:25:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1829 transitions. [2022-03-19 23:25:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 23:25:58,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:58,020 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:58,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:58,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-19 23:25:58,238 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash 891221002, now seen corresponding path program 116 times [2022-03-19 23:25:58,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:58,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762567113] [2022-03-19 23:25:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:58,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:58,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:58,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:58,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 23:25:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:25:58,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:58,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762567113] [2022-03-19 23:25:58,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762567113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:58,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413243089] [2022-03-19 23:25:58,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:25:58,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:58,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:58,959 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:58,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-19 23:25:59,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:25:59,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:59,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 23:25:59,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:25:59,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:26:00,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413243089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:00,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:00,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 51 [2022-03-19 23:26:00,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121514874] [2022-03-19 23:26:00,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:00,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:26:00,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:00,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:26:00,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2433, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:26:00,022 INFO L87 Difference]: Start difference. First operand 1654 states and 1829 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:26:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:03,615 INFO L93 Difference]: Finished difference Result 1660 states and 1834 transitions. [2022-03-19 23:26:03,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 23:26:03,615 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-19 23:26:03,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:03,624 INFO L225 Difference]: With dead ends: 1660 [2022-03-19 23:26:03,624 INFO L226 Difference]: Without dead ends: 1636 [2022-03-19 23:26:03,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=317, Invalid=7693, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 23:26:03,638 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 237 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7883 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 7929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 7883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:03,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 333 Invalid, 7929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 7883 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 23:26:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-03-19 23:26:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2022-03-19 23:26:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1480 states have (on average 1.1162162162162161) internal successors, (1652), 1578 states have internal predecessors, (1652), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (103), 52 states have call predecessors, (103), 52 states have call successors, (103) [2022-03-19 23:26:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1809 transitions. [2022-03-19 23:26:04,451 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1809 transitions. Word has length 63 [2022-03-19 23:26:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:04,451 INFO L478 AbstractCegarLoop]: Abstraction has 1636 states and 1809 transitions. [2022-03-19 23:26:04,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:26:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1809 transitions. [2022-03-19 23:26:04,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 23:26:04,499 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:04,500 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:04,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:04,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-19 23:26:04,700 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1351141142, now seen corresponding path program 117 times [2022-03-19 23:26:04,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:04,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275423743] [2022-03-19 23:26:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:04,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:04,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:04,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:04,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 23:26:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:26:05,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:05,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275423743] [2022-03-19 23:26:05,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275423743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:05,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389043952] [2022-03-19 23:26:05,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:26:05,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:05,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:05,327 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:26:05,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-19 23:26:05,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 23:26:05,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:05,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 23:26:05,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:26:06,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:26:06,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389043952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:06,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:06,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 51 [2022-03-19 23:26:06,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037315664] [2022-03-19 23:26:06,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:06,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:26:06,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:26:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2429, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:26:06,362 INFO L87 Difference]: Start difference. First operand 1636 states and 1809 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:26:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:08,992 INFO L93 Difference]: Finished difference Result 1642 states and 1814 transitions. [2022-03-19 23:26:08,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 23:26:08,992 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-19 23:26:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:09,000 INFO L225 Difference]: With dead ends: 1642 [2022-03-19 23:26:09,000 INFO L226 Difference]: Without dead ends: 1616 [2022-03-19 23:26:09,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=319, Invalid=7337, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 23:26:09,013 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 198 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6191 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 6235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 6191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:09,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 298 Invalid, 6235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 6191 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:26:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-03-19 23:26:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1616. [2022-03-19 23:26:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1463 states have (on average 1.1161995898838004) internal successors, (1633), 1559 states have internal predecessors, (1633), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (101), 51 states have call predecessors, (101), 51 states have call successors, (101) [2022-03-19 23:26:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 1787 transitions. [2022-03-19 23:26:09,812 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 1787 transitions. Word has length 63 [2022-03-19 23:26:09,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:09,812 INFO L478 AbstractCegarLoop]: Abstraction has 1616 states and 1787 transitions. [2022-03-19 23:26:09,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:26:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 1787 transitions. [2022-03-19 23:26:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 23:26:09,827 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:09,827 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:09,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:10,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:10,046 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:10,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:10,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1646063754, now seen corresponding path program 118 times [2022-03-19 23:26:10,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:10,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136729677] [2022-03-19 23:26:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:10,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:10,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:10,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:10,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 23:26:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:26:10,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:10,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136729677] [2022-03-19 23:26:10,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136729677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:10,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139749367] [2022-03-19 23:26:10,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:26:10,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:10,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:10,584 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:26:10,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-19 23:26:10,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:26:10,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:10,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:26:10,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:26:11,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:26:11,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139749367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:11,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:11,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 51 [2022-03-19 23:26:11,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183186186] [2022-03-19 23:26:11,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:11,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:26:11,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:11,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:26:11,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2425, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:26:11,557 INFO L87 Difference]: Start difference. First operand 1616 states and 1787 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:26:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:14,112 INFO L93 Difference]: Finished difference Result 1622 states and 1792 transitions. [2022-03-19 23:26:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 23:26:14,113 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-19 23:26:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:14,121 INFO L225 Difference]: With dead ends: 1622 [2022-03-19 23:26:14,121 INFO L226 Difference]: Without dead ends: 1594 [2022-03-19 23:26:14,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=321, Invalid=6989, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 23:26:14,137 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5383 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 5425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:14,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 293 Invalid, 5425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5383 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:26:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-03-19 23:26:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2022-03-19 23:26:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1444 states have (on average 1.1163434903047091) internal successors, (1612), 1538 states have internal predecessors, (1612), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (99), 50 states have call predecessors, (99), 50 states have call successors, (99) [2022-03-19 23:26:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 1763 transitions. [2022-03-19 23:26:14,929 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 1763 transitions. Word has length 63 [2022-03-19 23:26:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:14,930 INFO L478 AbstractCegarLoop]: Abstraction has 1594 states and 1763 transitions. [2022-03-19 23:26:14,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:26:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 1763 transitions. [2022-03-19 23:26:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 23:26:14,943 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:14,943 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:14,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:15,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-19 23:26:15,161 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1439349866, now seen corresponding path program 119 times [2022-03-19 23:26:15,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:15,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364473716] [2022-03-19 23:26:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:15,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:15,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:15,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:15,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 23:26:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:26:15,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364473716] [2022-03-19 23:26:15,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364473716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944721023] [2022-03-19 23:26:15,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:26:15,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:15,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:15,724 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:26:15,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-19 23:26:15,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-19 23:26:15,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:15,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:26:15,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:26:16,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:26:16,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944721023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:16,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:16,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 51 [2022-03-19 23:26:16,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977212129] [2022-03-19 23:26:16,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:16,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:26:16,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:26:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2421, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:26:16,774 INFO L87 Difference]: Start difference. First operand 1594 states and 1763 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:26:18,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:18,874 INFO L93 Difference]: Finished difference Result 1600 states and 1768 transitions. [2022-03-19 23:26:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 23:26:18,875 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-19 23:26:18,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:18,881 INFO L225 Difference]: With dead ends: 1600 [2022-03-19 23:26:18,881 INFO L226 Difference]: Without dead ends: 1570 [2022-03-19 23:26:18,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=323, Invalid=6649, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 23:26:18,893 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 121 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3651 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:18,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 250 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3651 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:26:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2022-03-19 23:26:19,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1570. [2022-03-19 23:26:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1423 states have (on average 1.1166549543218551) internal successors, (1589), 1515 states have internal predecessors, (1589), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (97), 49 states have call predecessors, (97), 49 states have call successors, (97) [2022-03-19 23:26:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 1737 transitions. [2022-03-19 23:26:19,661 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 1737 transitions. Word has length 63 [2022-03-19 23:26:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:19,661 INFO L478 AbstractCegarLoop]: Abstraction has 1570 states and 1737 transitions. [2022-03-19 23:26:19,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:26:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 1737 transitions. [2022-03-19 23:26:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 23:26:19,673 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:19,673 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:19,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-19 23:26:19,889 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-19 23:26:19,890 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:19,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1543877185, now seen corresponding path program 120 times [2022-03-19 23:26:19,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:19,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900973391] [2022-03-19 23:26:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:19,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:19,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:19,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:20,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:26:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 23:26:20,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:20,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900973391] [2022-03-19 23:26:20,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900973391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:20,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035067115] [2022-03-19 23:26:20,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:26:20,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:20,189 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:26:20,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-19 23:26:20,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 23:26:20,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:20,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 23:26:20,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 23:26:20,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 23:26:21,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035067115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:21,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:21,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 57 [2022-03-19 23:26:21,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812730053] [2022-03-19 23:26:21,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:21,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:26:21,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:21,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:26:21,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:26:21,619 INFO L87 Difference]: Start difference. First operand 1570 states and 1737 transitions. Second operand has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:24,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:24,786 INFO L93 Difference]: Finished difference Result 1690 states and 1883 transitions. [2022-03-19 23:26:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:26:24,786 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-03-19 23:26:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:24,821 INFO L225 Difference]: With dead ends: 1690 [2022-03-19 23:26:24,821 INFO L226 Difference]: Without dead ends: 1670 [2022-03-19 23:26:24,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=580, Invalid=7252, Unknown=0, NotChecked=0, Total=7832 [2022-03-19 23:26:24,836 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 848 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4949 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 5043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 4949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:24,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 274 Invalid, 5043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 4949 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:26:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-03-19 23:26:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1665. [2022-03-19 23:26:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1479 states have (on average 1.1115618661257607) internal successors, (1644), 1597 states have internal predecessors, (1644), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2022-03-19 23:26:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 1844 transitions. [2022-03-19 23:26:25,639 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 1844 transitions. Word has length 63 [2022-03-19 23:26:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:25,639 INFO L478 AbstractCegarLoop]: Abstraction has 1665 states and 1844 transitions. [2022-03-19 23:26:25,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 1844 transitions. [2022-03-19 23:26:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 23:26:25,654 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:25,654 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:25,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-19 23:26:25,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-19 23:26:25,859 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:25,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1599476470, now seen corresponding path program 121 times [2022-03-19 23:26:25,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:25,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501235826] [2022-03-19 23:26:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:25,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:25,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:25,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:26,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 23:26:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:26:26,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:26,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501235826] [2022-03-19 23:26:26,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501235826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:26,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106012917] [2022-03-19 23:26:26,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:26:26,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:26,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:26,359 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:26:26,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-19 23:26:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:26,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 23:26:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:26:27,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:26:27,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106012917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:27,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:27,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 51 [2022-03-19 23:26:27,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471929622] [2022-03-19 23:26:27,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:27,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:26:27,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:26:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2417, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:26:27,579 INFO L87 Difference]: Start difference. First operand 1665 states and 1844 transitions. Second operand has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:26:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:29,613 INFO L93 Difference]: Finished difference Result 1683 states and 1866 transitions. [2022-03-19 23:26:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 23:26:29,613 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2022-03-19 23:26:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:29,625 INFO L225 Difference]: With dead ends: 1683 [2022-03-19 23:26:29,625 INFO L226 Difference]: Without dead ends: 1663 [2022-03-19 23:26:29,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=325, Invalid=6317, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 23:26:29,641 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2606 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:29,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 228 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2606 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:26:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-03-19 23:26:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1658. [2022-03-19 23:26:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1472 states have (on average 1.1127717391304348) internal successors, (1638), 1590 states have internal predecessors, (1638), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2022-03-19 23:26:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 1838 transitions. [2022-03-19 23:26:30,433 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 1838 transitions. Word has length 63 [2022-03-19 23:26:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:30,434 INFO L478 AbstractCegarLoop]: Abstraction has 1658 states and 1838 transitions. [2022-03-19 23:26:30,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.3125) internal successors, (63), 45 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:26:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 1838 transitions. [2022-03-19 23:26:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 23:26:30,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:30,449 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:30,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:30,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:30,653 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:30,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1883683963, now seen corresponding path program 122 times [2022-03-19 23:26:30,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:30,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71933752] [2022-03-19 23:26:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:30,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:30,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:30,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:30,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:26:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 23:26:31,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:31,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71933752] [2022-03-19 23:26:31,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71933752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:31,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326579165] [2022-03-19 23:26:31,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:26:31,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:31,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:31,039 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:26:31,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-19 23:26:31,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:26:31,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:31,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 23:26:31,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 23:26:31,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 23:26:32,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326579165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:32,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:32,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 57 [2022-03-19 23:26:32,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333287290] [2022-03-19 23:26:32,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:32,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:26:32,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:32,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:26:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:26:32,106 INFO L87 Difference]: Start difference. First operand 1658 states and 1838 transitions. Second operand has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:34,808 INFO L93 Difference]: Finished difference Result 1672 states and 1851 transitions. [2022-03-19 23:26:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:26:34,809 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-03-19 23:26:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:34,817 INFO L225 Difference]: With dead ends: 1672 [2022-03-19 23:26:34,817 INFO L226 Difference]: Without dead ends: 1642 [2022-03-19 23:26:34,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=580, Invalid=7252, Unknown=0, NotChecked=0, Total=7832 [2022-03-19 23:26:34,832 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 1144 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4384 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 4477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:34,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 250 Invalid, 4477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4384 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 23:26:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-03-19 23:26:35,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2022-03-19 23:26:35,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1454 states have (on average 1.1127922971114168) internal successors, (1618), 1572 states have internal predecessors, (1618), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (124), 62 states have call predecessors, (124), 62 states have call successors, (124) [2022-03-19 23:26:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1806 transitions. [2022-03-19 23:26:35,631 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1806 transitions. Word has length 63 [2022-03-19 23:26:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:35,631 INFO L478 AbstractCegarLoop]: Abstraction has 1640 states and 1806 transitions. [2022-03-19 23:26:35,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 56 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1806 transitions. [2022-03-19 23:26:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 23:26:35,646 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:35,646 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:35,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-19 23:26:35,862 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:35,862 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:35,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2024599665, now seen corresponding path program 123 times [2022-03-19 23:26:35,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:35,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620588572] [2022-03-19 23:26:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:35,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:35,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:35,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:36,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 23:26:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:26:36,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:36,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620588572] [2022-03-19 23:26:36,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620588572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:36,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848828653] [2022-03-19 23:26:36,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:26:36,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:36,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:36,513 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:26:36,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-19 23:26:36,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-19 23:26:36,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:36,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 23:26:36,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:26:37,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:26:38,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848828653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:38,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:38,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 97 [2022-03-19 23:26:38,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274845928] [2022-03-19 23:26:38,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:38,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-19 23:26:38,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-19 23:26:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=8985, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 23:26:38,798 INFO L87 Difference]: Start difference. First operand 1640 states and 1806 transitions. Second operand has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:47,151 INFO L93 Difference]: Finished difference Result 1814 states and 2009 transitions. [2022-03-19 23:26:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 23:26:47,151 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-03-19 23:26:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:47,175 INFO L225 Difference]: With dead ends: 1814 [2022-03-19 23:26:47,175 INFO L226 Difference]: Without dead ends: 1800 [2022-03-19 23:26:47,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3617 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1330, Invalid=23162, Unknown=0, NotChecked=0, Total=24492 [2022-03-19 23:26:47,194 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 2708 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12532 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2713 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 12821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 12532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:47,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2713 Valid, 426 Invalid, 12821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 12532 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-19 23:26:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-03-19 23:26:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1791. [2022-03-19 23:26:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1587 states have (on average 1.1121613106490233) internal successors, (1765), 1717 states have internal predecessors, (1765), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (142), 68 states have call predecessors, (142), 68 states have call successors, (142) [2022-03-19 23:26:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 1977 transitions. [2022-03-19 23:26:48,148 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 1977 transitions. Word has length 64 [2022-03-19 23:26:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:48,148 INFO L478 AbstractCegarLoop]: Abstraction has 1791 states and 1977 transitions. [2022-03-19 23:26:48,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 1977 transitions. [2022-03-19 23:26:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 23:26:48,165 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:48,165 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:48,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-19 23:26:48,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:48,375 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:48,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1465378380, now seen corresponding path program 124 times [2022-03-19 23:26:48,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:48,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180765639] [2022-03-19 23:26:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:48,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:48,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:48,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:48,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:26:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:26:49,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180765639] [2022-03-19 23:26:49,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180765639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605136652] [2022-03-19 23:26:49,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:26:49,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:49,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:49,030 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:26:49,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-19 23:26:49,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:26:49,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 23:26:49,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:26:50,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:26:51,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605136652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:51,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:51,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 97 [2022-03-19 23:26:51,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470219285] [2022-03-19 23:26:51,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:51,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-19 23:26:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-19 23:26:51,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=8985, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 23:26:51,562 INFO L87 Difference]: Start difference. First operand 1791 states and 1977 transitions. Second operand has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:00,035 INFO L93 Difference]: Finished difference Result 1806 states and 1992 transitions. [2022-03-19 23:27:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 23:27:00,036 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-03-19 23:27:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:00,044 INFO L225 Difference]: With dead ends: 1806 [2022-03-19 23:27:00,044 INFO L226 Difference]: Without dead ends: 1794 [2022-03-19 23:27:00,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3635 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1330, Invalid=23162, Unknown=0, NotChecked=0, Total=24492 [2022-03-19 23:27:00,062 INFO L913 BasicCegarLoop]: 168 mSDtfsCounter, 2740 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12639 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2769 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 12900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 12639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:00,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2769 Valid, 430 Invalid, 12900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 12639 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-19 23:27:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-03-19 23:27:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1792. [2022-03-19 23:27:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1588 states have (on average 1.1120906801007557) internal successors, (1766), 1718 states have internal predecessors, (1766), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (135), 68 states have call predecessors, (135), 68 states have call successors, (135) [2022-03-19 23:27:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 1971 transitions. [2022-03-19 23:27:01,012 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 1971 transitions. Word has length 64 [2022-03-19 23:27:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:01,012 INFO L478 AbstractCegarLoop]: Abstraction has 1792 states and 1971 transitions. [2022-03-19 23:27:01,012 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 1971 transitions. [2022-03-19 23:27:01,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 23:27:01,030 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:01,030 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:01,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:01,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-19 23:27:01,247 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:01,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1431947726, now seen corresponding path program 125 times [2022-03-19 23:27:01,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:01,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338984007] [2022-03-19 23:27:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:01,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:01,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:01,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:01,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 23:27:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:27:01,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:01,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338984007] [2022-03-19 23:27:01,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338984007] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:01,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529910990] [2022-03-19 23:27:01,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:27:01,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:01,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:01,398 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:01,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-19 23:27:01,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:27:01,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:01,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 23:27:01,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:27:01,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:27:01,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529910990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:01,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:01,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 28 [2022-03-19 23:27:01,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522536054] [2022-03-19 23:27:01,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:01,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 23:27:01,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:01,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 23:27:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2022-03-19 23:27:01,766 INFO L87 Difference]: Start difference. First operand 1792 states and 1971 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:03,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:03,217 INFO L93 Difference]: Finished difference Result 2699 states and 2926 transitions. [2022-03-19 23:27:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 23:27:03,217 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 64 [2022-03-19 23:27:03,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:03,253 INFO L225 Difference]: With dead ends: 2699 [2022-03-19 23:27:03,253 INFO L226 Difference]: Without dead ends: 1795 [2022-03-19 23:27:03,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1609, Invalid=3647, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 23:27:03,280 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 109 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:03,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 102 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:27:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-03-19 23:27:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1787. [2022-03-19 23:27:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1589 states have (on average 1.1095028319697924) internal successors, (1763), 1715 states have internal predecessors, (1763), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (129), 66 states have call predecessors, (129), 66 states have call successors, (129) [2022-03-19 23:27:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 1960 transitions. [2022-03-19 23:27:04,259 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 1960 transitions. Word has length 64 [2022-03-19 23:27:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:04,259 INFO L478 AbstractCegarLoop]: Abstraction has 1787 states and 1960 transitions. [2022-03-19 23:27:04,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 1960 transitions. [2022-03-19 23:27:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 23:27:04,276 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:04,276 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:04,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-19 23:27:04,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-19 23:27:04,492 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1759884717, now seen corresponding path program 126 times [2022-03-19 23:27:04,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:04,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943129378] [2022-03-19 23:27:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:04,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:04,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:04,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:04,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:27:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:27:04,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:04,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943129378] [2022-03-19 23:27:04,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943129378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:04,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738767781] [2022-03-19 23:27:04,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:27:04,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:04,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:04,628 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:04,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-19 23:27:04,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 23:27:04,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:04,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 23:27:04,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:27:04,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:27:05,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738767781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:05,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:05,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 28 [2022-03-19 23:27:05,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424004727] [2022-03-19 23:27:05,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:05,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 23:27:05,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:05,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 23:27:05,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2022-03-19 23:27:05,032 INFO L87 Difference]: Start difference. First operand 1787 states and 1960 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:27:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:06,685 INFO L93 Difference]: Finished difference Result 1853 states and 2040 transitions. [2022-03-19 23:27:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 23:27:06,685 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-03-19 23:27:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:06,694 INFO L225 Difference]: With dead ends: 1853 [2022-03-19 23:27:06,694 INFO L226 Difference]: Without dead ends: 1802 [2022-03-19 23:27:06,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1609, Invalid=3647, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 23:27:06,713 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 184 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:06,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 83 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:27:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-03-19 23:27:07,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1802. [2022-03-19 23:27:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1604 states have (on average 1.1084788029925188) internal successors, (1778), 1730 states have internal predecessors, (1778), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (129), 66 states have call predecessors, (129), 66 states have call successors, (129) [2022-03-19 23:27:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1975 transitions. [2022-03-19 23:27:07,692 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1975 transitions. Word has length 64 [2022-03-19 23:27:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:07,692 INFO L478 AbstractCegarLoop]: Abstraction has 1802 states and 1975 transitions. [2022-03-19 23:27:07,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:27:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1975 transitions. [2022-03-19 23:27:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 23:27:07,710 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:07,711 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:07,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:07,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-19 23:27:07,927 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:07,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:07,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1457584397, now seen corresponding path program 127 times [2022-03-19 23:27:07,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:07,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432967594] [2022-03-19 23:27:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:07,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:07,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:07,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:08,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:27:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:27:08,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:08,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432967594] [2022-03-19 23:27:08,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432967594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:08,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419480248] [2022-03-19 23:27:08,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:27:08,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:08,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:08,796 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:08,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-19 23:27:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:08,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 23:27:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:27:09,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:27:09,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419480248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:09,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:09,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 53 [2022-03-19 23:27:09,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719968313] [2022-03-19 23:27:09,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:09,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 23:27:09,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:09,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 23:27:09,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2643, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 23:27:09,639 INFO L87 Difference]: Start difference. First operand 1802 states and 1975 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:13,982 INFO L93 Difference]: Finished difference Result 1980 states and 2172 transitions. [2022-03-19 23:27:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 23:27:13,982 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-19 23:27:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:13,997 INFO L225 Difference]: With dead ends: 1980 [2022-03-19 23:27:13,997 INFO L226 Difference]: Without dead ends: 1974 [2022-03-19 23:27:14,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=325, Invalid=9181, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 23:27:14,016 INFO L913 BasicCegarLoop]: 169 mSDtfsCounter, 375 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 12265 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 12333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 12265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:14,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 406 Invalid, 12333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 12265 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-19 23:27:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2022-03-19 23:27:14,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1818. [2022-03-19 23:27:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1617 states have (on average 1.1088435374149659) internal successors, (1793), 1745 states have internal predecessors, (1793), 69 states have call successors, (69), 5 states have call predecessors, (69), 131 states have return successors, (132), 67 states have call predecessors, (132), 67 states have call successors, (132) [2022-03-19 23:27:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 1994 transitions. [2022-03-19 23:27:14,975 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 1994 transitions. Word has length 65 [2022-03-19 23:27:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:14,975 INFO L478 AbstractCegarLoop]: Abstraction has 1818 states and 1994 transitions. [2022-03-19 23:27:14,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 1994 transitions. [2022-03-19 23:27:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 23:27:14,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:14,994 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:15,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:15,210 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-19 23:27:15,210 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1334309325, now seen corresponding path program 128 times [2022-03-19 23:27:15,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:15,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987175873] [2022-03-19 23:27:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:15,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:15,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:15,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:15,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:27:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:27:15,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:15,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987175873] [2022-03-19 23:27:15,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987175873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:15,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901628986] [2022-03-19 23:27:15,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:27:15,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:15,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:15,969 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:15,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-19 23:27:16,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:27:16,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 23:27:16,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:27:16,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:27:16,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901628986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:16,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:16,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 53 [2022-03-19 23:27:16,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576903194] [2022-03-19 23:27:16,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:16,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 23:27:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:16,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 23:27:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2639, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 23:27:16,868 INFO L87 Difference]: Start difference. First operand 1818 states and 1994 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:20,266 INFO L93 Difference]: Finished difference Result 1824 states and 1999 transitions. [2022-03-19 23:27:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 23:27:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-19 23:27:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:20,275 INFO L225 Difference]: With dead ends: 1824 [2022-03-19 23:27:20,275 INFO L226 Difference]: Without dead ends: 1802 [2022-03-19 23:27:20,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=327, Invalid=8793, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 23:27:20,294 INFO L913 BasicCegarLoop]: 154 mSDtfsCounter, 290 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 10682 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 10729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 10682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:20,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 381 Invalid, 10729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 10682 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 23:27:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-03-19 23:27:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1802. [2022-03-19 23:27:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1604 states have (on average 1.1084788029925188) internal successors, (1778), 1730 states have internal predecessors, (1778), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (130), 66 states have call predecessors, (130), 66 states have call successors, (130) [2022-03-19 23:27:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1976 transitions. [2022-03-19 23:27:21,334 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1976 transitions. Word has length 65 [2022-03-19 23:27:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:21,334 INFO L478 AbstractCegarLoop]: Abstraction has 1802 states and 1976 transitions. [2022-03-19 23:27:21,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1976 transitions. [2022-03-19 23:27:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 23:27:21,351 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:21,351 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:21,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-19 23:27:21,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-03-19 23:27:21,568 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:21,568 INFO L85 PathProgramCache]: Analyzing trace with hash -848414451, now seen corresponding path program 129 times [2022-03-19 23:27:21,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:21,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254794241] [2022-03-19 23:27:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:21,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:21,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:21,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:21,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:27:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:27:22,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:22,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254794241] [2022-03-19 23:27:22,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254794241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:22,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500796842] [2022-03-19 23:27:22,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:27:22,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:22,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:22,343 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:22,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-19 23:27:22,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-19 23:27:22,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:22,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 23:27:22,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:27:23,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:27:23,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500796842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:23,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:23,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 53 [2022-03-19 23:27:23,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081660296] [2022-03-19 23:27:23,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:23,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 23:27:23,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:23,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 23:27:23,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2635, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 23:27:23,390 INFO L87 Difference]: Start difference. First operand 1802 states and 1976 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:27,006 INFO L93 Difference]: Finished difference Result 1808 states and 1981 transitions. [2022-03-19 23:27:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 23:27:27,006 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-19 23:27:27,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:27,016 INFO L225 Difference]: With dead ends: 1808 [2022-03-19 23:27:27,016 INFO L226 Difference]: Without dead ends: 1784 [2022-03-19 23:27:27,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=329, Invalid=8413, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 23:27:27,034 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 251 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9339 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 9385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 9339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:27,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 361 Invalid, 9385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 9339 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 23:27:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-03-19 23:27:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1784. [2022-03-19 23:27:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1589 states have (on average 1.1082441787287602) internal successors, (1761), 1713 states have internal predecessors, (1761), 67 states have call successors, (67), 5 states have call predecessors, (67), 127 states have return successors, (128), 65 states have call predecessors, (128), 65 states have call successors, (128) [2022-03-19 23:27:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 1956 transitions. [2022-03-19 23:27:27,959 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 1956 transitions. Word has length 65 [2022-03-19 23:27:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:27,959 INFO L478 AbstractCegarLoop]: Abstraction has 1784 states and 1956 transitions. [2022-03-19 23:27:27,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 1956 transitions. [2022-03-19 23:27:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 23:27:27,975 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:27,975 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:27,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-19 23:27:28,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-19 23:27:28,187 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:28,188 INFO L85 PathProgramCache]: Analyzing trace with hash 675131853, now seen corresponding path program 130 times [2022-03-19 23:27:28,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:28,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110995303] [2022-03-19 23:27:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:28,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:28,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:28,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:28,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:27:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:27:28,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:28,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110995303] [2022-03-19 23:27:28,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110995303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:28,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383833598] [2022-03-19 23:27:28,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:27:28,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:28,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:28,880 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:28,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-19 23:27:29,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:27:29,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:29,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 23:27:29,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:27:29,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:27:29,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383833598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:29,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:29,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 53 [2022-03-19 23:27:29,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221572076] [2022-03-19 23:27:29,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:29,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 23:27:29,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 23:27:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2631, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 23:27:29,786 INFO L87 Difference]: Start difference. First operand 1784 states and 1956 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:32,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:32,603 INFO L93 Difference]: Finished difference Result 1790 states and 1961 transitions. [2022-03-19 23:27:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 23:27:32,604 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-19 23:27:32,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:32,614 INFO L225 Difference]: With dead ends: 1790 [2022-03-19 23:27:32,614 INFO L226 Difference]: Without dead ends: 1764 [2022-03-19 23:27:32,636 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=331, Invalid=8041, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 23:27:32,636 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 212 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7467 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 7511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 7467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:32,636 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 326 Invalid, 7511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 7467 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 23:27:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-03-19 23:27:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1764. [2022-03-19 23:27:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1572 states have (on average 1.1081424936386768) internal successors, (1742), 1694 states have internal predecessors, (1742), 66 states have call successors, (66), 5 states have call predecessors, (66), 125 states have return successors, (126), 64 states have call predecessors, (126), 64 states have call successors, (126) [2022-03-19 23:27:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 1934 transitions. [2022-03-19 23:27:33,605 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 1934 transitions. Word has length 65 [2022-03-19 23:27:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:33,605 INFO L478 AbstractCegarLoop]: Abstraction has 1764 states and 1934 transitions. [2022-03-19 23:27:33,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 1934 transitions. [2022-03-19 23:27:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 23:27:33,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:33,622 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:33,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:33,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:33,829 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:33,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:33,829 INFO L85 PathProgramCache]: Analyzing trace with hash -294291187, now seen corresponding path program 131 times [2022-03-19 23:27:33,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:33,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422385397] [2022-03-19 23:27:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:33,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:33,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:33,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:34,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:27:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:27:34,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422385397] [2022-03-19 23:27:34,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422385397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902914911] [2022-03-19 23:27:34,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:27:34,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:34,414 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:34,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-19 23:27:34,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:27:34,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:34,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 23:27:34,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:27:35,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:27:35,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902914911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:35,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:35,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 53 [2022-03-19 23:27:35,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106903078] [2022-03-19 23:27:35,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:35,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 23:27:35,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:35,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 23:27:35,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2627, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 23:27:35,401 INFO L87 Difference]: Start difference. First operand 1764 states and 1934 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:38,099 INFO L93 Difference]: Finished difference Result 1770 states and 1939 transitions. [2022-03-19 23:27:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 23:27:38,100 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-19 23:27:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:38,122 INFO L225 Difference]: With dead ends: 1770 [2022-03-19 23:27:38,122 INFO L226 Difference]: Without dead ends: 1742 [2022-03-19 23:27:38,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=7677, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 23:27:38,144 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 173 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6073 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 6115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:38,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 301 Invalid, 6115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6073 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:27:38,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-03-19 23:27:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1742. [2022-03-19 23:27:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1553 states have (on average 1.1081777205408887) internal successors, (1721), 1673 states have internal predecessors, (1721), 65 states have call successors, (65), 5 states have call predecessors, (65), 123 states have return successors, (124), 63 states have call predecessors, (124), 63 states have call successors, (124) [2022-03-19 23:27:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 1910 transitions. [2022-03-19 23:27:39,055 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 1910 transitions. Word has length 65 [2022-03-19 23:27:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:39,055 INFO L478 AbstractCegarLoop]: Abstraction has 1742 states and 1910 transitions. [2022-03-19 23:27:39,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 1910 transitions. [2022-03-19 23:27:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 23:27:39,072 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:39,072 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:39,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:39,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:39,288 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1350136269, now seen corresponding path program 132 times [2022-03-19 23:27:39,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:39,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929186357] [2022-03-19 23:27:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:39,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:39,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:39,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:39,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:27:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:27:39,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929186357] [2022-03-19 23:27:39,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929186357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950626522] [2022-03-19 23:27:39,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:27:39,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:39,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:39,790 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:39,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-19 23:27:39,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 23:27:39,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:39,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:27:39,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:27:40,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:27:40,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950626522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:40,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:40,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 53 [2022-03-19 23:27:40,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943616162] [2022-03-19 23:27:40,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:40,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 23:27:40,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 23:27:40,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2623, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 23:27:40,850 INFO L87 Difference]: Start difference. First operand 1742 states and 1910 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:43,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:43,255 INFO L93 Difference]: Finished difference Result 1748 states and 1915 transitions. [2022-03-19 23:27:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 23:27:43,256 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-19 23:27:43,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:43,264 INFO L225 Difference]: With dead ends: 1748 [2022-03-19 23:27:43,264 INFO L226 Difference]: Without dead ends: 1718 [2022-03-19 23:27:43,281 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=335, Invalid=7321, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 23:27:43,281 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 135 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4300 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:43,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 256 Invalid, 4340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4300 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 23:27:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-03-19 23:27:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1718. [2022-03-19 23:27:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1532 states have (on average 1.108355091383812) internal successors, (1698), 1650 states have internal predecessors, (1698), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (122), 62 states have call predecessors, (122), 62 states have call successors, (122) [2022-03-19 23:27:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 1884 transitions. [2022-03-19 23:27:44,184 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 1884 transitions. Word has length 65 [2022-03-19 23:27:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:44,184 INFO L478 AbstractCegarLoop]: Abstraction has 1718 states and 1884 transitions. [2022-03-19 23:27:44,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 1884 transitions. [2022-03-19 23:27:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 23:27:44,202 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:44,202 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:44,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-19 23:27:44,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:44,403 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1376339699, now seen corresponding path program 133 times [2022-03-19 23:27:44,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:44,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313766771] [2022-03-19 23:27:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:44,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:44,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:44,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:44,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:27:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:27:44,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:44,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313766771] [2022-03-19 23:27:44,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313766771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:44,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275698682] [2022-03-19 23:27:44,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:27:44,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:44,879 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:44,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-19 23:27:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:45,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:27:45,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:27:45,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:27:46,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275698682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:46,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:46,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 53 [2022-03-19 23:27:46,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195485075] [2022-03-19 23:27:46,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:46,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 23:27:46,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:46,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 23:27:46,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2619, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 23:27:46,008 INFO L87 Difference]: Start difference. First operand 1718 states and 1884 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:48,283 INFO L93 Difference]: Finished difference Result 1724 states and 1889 transitions. [2022-03-19 23:27:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 23:27:48,283 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-19 23:27:48,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:48,292 INFO L225 Difference]: With dead ends: 1724 [2022-03-19 23:27:48,292 INFO L226 Difference]: Without dead ends: 1692 [2022-03-19 23:27:48,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=337, Invalid=6973, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 23:27:48,309 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3593 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:48,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 256 Invalid, 3631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3593 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:27:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-03-19 23:27:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1692. [2022-03-19 23:27:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1509 states have (on average 1.1086812458581843) internal successors, (1673), 1625 states have internal predecessors, (1673), 63 states have call successors, (63), 5 states have call predecessors, (63), 119 states have return successors, (120), 61 states have call predecessors, (120), 61 states have call successors, (120) [2022-03-19 23:27:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 1856 transitions. [2022-03-19 23:27:49,195 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 1856 transitions. Word has length 65 [2022-03-19 23:27:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:49,195 INFO L478 AbstractCegarLoop]: Abstraction has 1692 states and 1856 transitions. [2022-03-19 23:27:49,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 1856 transitions. [2022-03-19 23:27:49,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 23:27:49,212 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:49,212 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:49,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:49,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:49,429 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash 70988237, now seen corresponding path program 134 times [2022-03-19 23:27:49,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:49,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813440426] [2022-03-19 23:27:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:49,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:49,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:49,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:49,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:27:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:27:49,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:49,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813440426] [2022-03-19 23:27:49,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813440426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:49,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530319522] [2022-03-19 23:27:49,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:27:49,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:49,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:49,935 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:49,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-19 23:27:50,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:27:50,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:50,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 23:27:50,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:27:50,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:27:51,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530319522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:51,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:51,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 53 [2022-03-19 23:27:51,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477690425] [2022-03-19 23:27:51,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:51,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 23:27:51,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 23:27:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2615, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 23:27:51,219 INFO L87 Difference]: Start difference. First operand 1692 states and 1856 transitions. Second operand has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:52,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:52,960 INFO L93 Difference]: Finished difference Result 1710 states and 1877 transitions. [2022-03-19 23:27:52,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 23:27:52,960 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-03-19 23:27:52,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:52,980 INFO L225 Difference]: With dead ends: 1710 [2022-03-19 23:27:52,980 INFO L226 Difference]: Without dead ends: 1704 [2022-03-19 23:27:52,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=339, Invalid=6633, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 23:27:52,997 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:52,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 193 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:27:52,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-03-19 23:27:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1702. [2022-03-19 23:27:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1516 states have (on average 1.1094986807387863) internal successors, (1682), 1634 states have internal predecessors, (1682), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (123), 62 states have call predecessors, (123), 62 states have call successors, (123) [2022-03-19 23:27:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 1869 transitions. [2022-03-19 23:27:53,922 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 1869 transitions. Word has length 65 [2022-03-19 23:27:53,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:53,922 INFO L478 AbstractCegarLoop]: Abstraction has 1702 states and 1869 transitions. [2022-03-19 23:27:53,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.3) internal successors, (65), 47 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:27:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 1869 transitions. [2022-03-19 23:27:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 23:27:53,940 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:53,940 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:53,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:54,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:54,152 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1215970924, now seen corresponding path program 135 times [2022-03-19 23:27:54,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:54,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004733663] [2022-03-19 23:27:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:54,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:54,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:54,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:54,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:27:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:27:54,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:54,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004733663] [2022-03-19 23:27:54,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004733663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:54,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075118995] [2022-03-19 23:27:54,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:27:54,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:54,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:54,874 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:54,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-19 23:27:55,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-19 23:27:55,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:55,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 23:27:55,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:27:56,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:27:58,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075118995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:58,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:58,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 103 [2022-03-19 23:27:58,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576976550] [2022-03-19 23:27:58,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:58,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-19 23:27:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-19 23:27:58,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=10158, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 23:27:58,690 INFO L87 Difference]: Start difference. First operand 1702 states and 1869 transitions. Second operand has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:08,508 INFO L93 Difference]: Finished difference Result 1878 states and 2074 transitions. [2022-03-19 23:28:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 23:28:08,509 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-03-19 23:28:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:08,554 INFO L225 Difference]: With dead ends: 1878 [2022-03-19 23:28:08,554 INFO L226 Difference]: Without dead ends: 1864 [2022-03-19 23:28:08,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4114 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1466, Invalid=26256, Unknown=0, NotChecked=0, Total=27722 [2022-03-19 23:28:08,632 INFO L913 BasicCegarLoop]: 174 mSDtfsCounter, 3049 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 14660 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3054 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 14984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 14660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:08,632 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3054 Valid, 476 Invalid, 14984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 14660 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-19 23:28:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-03-19 23:28:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1855. [2022-03-19 23:28:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1651 states have (on average 1.1090248334342823) internal successors, (1831), 1781 states have internal predecessors, (1831), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (141), 68 states have call predecessors, (141), 68 states have call successors, (141) [2022-03-19 23:28:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2042 transitions. [2022-03-19 23:28:09,699 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2042 transitions. Word has length 66 [2022-03-19 23:28:09,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:09,699 INFO L478 AbstractCegarLoop]: Abstraction has 1855 states and 2042 transitions. [2022-03-19 23:28:09,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2042 transitions. [2022-03-19 23:28:09,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 23:28:09,720 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:09,720 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:09,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:09,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:09,924 INFO L403 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:09,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:09,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2031107919, now seen corresponding path program 136 times [2022-03-19 23:28:09,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:09,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137646928] [2022-03-19 23:28:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:09,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:09,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:09,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:10,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:28:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:28:10,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:10,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137646928] [2022-03-19 23:28:10,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137646928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:10,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121769262] [2022-03-19 23:28:10,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:28:10,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:10,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:10,703 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:28:10,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-19 23:28:10,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:28:10,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:10,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 23:28:10,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:28:12,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:28:13,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121769262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:13,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:13,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 103 [2022-03-19 23:28:13,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086860417] [2022-03-19 23:28:13,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:13,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-19 23:28:13,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:13,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-19 23:28:13,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=10158, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 23:28:13,880 INFO L87 Difference]: Start difference. First operand 1855 states and 2042 transitions. Second operand has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:23,789 INFO L93 Difference]: Finished difference Result 1870 states and 2057 transitions. [2022-03-19 23:28:23,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 23:28:23,790 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-03-19 23:28:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:23,800 INFO L225 Difference]: With dead ends: 1870 [2022-03-19 23:28:23,801 INFO L226 Difference]: Without dead ends: 1858 [2022-03-19 23:28:23,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1466, Invalid=26256, Unknown=0, NotChecked=0, Total=27722 [2022-03-19 23:28:23,845 INFO L913 BasicCegarLoop]: 178 mSDtfsCounter, 3019 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 15547 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3050 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 15841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 15547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:23,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3050 Valid, 490 Invalid, 15841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 15547 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-19 23:28:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-03-19 23:28:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1856. [2022-03-19 23:28:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1652 states have (on average 1.1089588377723971) internal successors, (1832), 1782 states have internal predecessors, (1832), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-03-19 23:28:24,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2036 transitions. [2022-03-19 23:28:24,920 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2036 transitions. Word has length 66 [2022-03-19 23:28:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:24,920 INFO L478 AbstractCegarLoop]: Abstraction has 1856 states and 2036 transitions. [2022-03-19 23:28:24,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 102 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2036 transitions. [2022-03-19 23:28:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 23:28:24,942 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:24,942 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:24,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:25,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-19 23:28:25,155 INFO L403 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash -745195091, now seen corresponding path program 137 times [2022-03-19 23:28:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:25,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850230153] [2022-03-19 23:28:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:25,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:25,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:25,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:28:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:28:25,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:25,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850230153] [2022-03-19 23:28:25,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850230153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:25,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145048099] [2022-03-19 23:28:25,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:28:25,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:25,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:25,315 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:28:25,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-19 23:28:25,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-19 23:28:25,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:25,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 23:28:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:28:25,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:28:25,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145048099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:25,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:25,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 30 [2022-03-19 23:28:25,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213520248] [2022-03-19 23:28:25,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:25,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 23:28:25,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:25,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 23:28:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-03-19 23:28:25,788 INFO L87 Difference]: Start difference. First operand 1856 states and 2036 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:28:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:28,001 INFO L93 Difference]: Finished difference Result 2152 states and 2381 transitions. [2022-03-19 23:28:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 23:28:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 66 [2022-03-19 23:28:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:28,015 INFO L225 Difference]: With dead ends: 2152 [2022-03-19 23:28:28,015 INFO L226 Difference]: Without dead ends: 2082 [2022-03-19 23:28:28,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1673, Invalid=5299, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 23:28:28,102 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 215 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:28,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 92 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:28:28,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-03-19 23:28:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2034. [2022-03-19 23:28:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1830 states have (on average 1.1076502732240436) internal successors, (2027), 1960 states have internal predecessors, (2027), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-03-19 23:28:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 2231 transitions. [2022-03-19 23:28:29,362 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 2231 transitions. Word has length 66 [2022-03-19 23:28:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:29,362 INFO L478 AbstractCegarLoop]: Abstraction has 2034 states and 2231 transitions. [2022-03-19 23:28:29,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:28:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 2231 transitions. [2022-03-19 23:28:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 23:28:29,389 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:29,389 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:29,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-19 23:28:29,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-19 23:28:29,597 INFO L403 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash -582637166, now seen corresponding path program 138 times [2022-03-19 23:28:29,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:29,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319574128] [2022-03-19 23:28:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:29,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:29,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:29,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:29,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:28:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:28:29,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:29,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319574128] [2022-03-19 23:28:29,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319574128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:29,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522932878] [2022-03-19 23:28:29,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:28:29,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:29,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:29,734 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:28:29,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-19 23:28:29,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 23:28:29,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:29,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 23:28:29,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:28:30,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 23:28:30,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522932878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:30,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:30,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 30 [2022-03-19 23:28:30,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022607293] [2022-03-19 23:28:30,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:30,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 23:28:30,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 23:28:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-03-19 23:28:30,225 INFO L87 Difference]: Start difference. First operand 2034 states and 2231 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:28:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:32,617 INFO L93 Difference]: Finished difference Result 3395 states and 3698 transitions. [2022-03-19 23:28:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 23:28:32,617 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2022-03-19 23:28:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:32,678 INFO L225 Difference]: With dead ends: 3395 [2022-03-19 23:28:32,679 INFO L226 Difference]: Without dead ends: 2260 [2022-03-19 23:28:32,706 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1673, Invalid=5299, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 23:28:32,707 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 243 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:32,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 107 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:28:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-03-19 23:28:34,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2212. [2022-03-19 23:28:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2008 states have (on average 1.1065737051792828) internal successors, (2222), 2138 states have internal predecessors, (2222), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (134), 68 states have call predecessors, (134), 68 states have call successors, (134) [2022-03-19 23:28:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2426 transitions. [2022-03-19 23:28:34,084 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2426 transitions. Word has length 66 [2022-03-19 23:28:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:34,084 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2426 transitions. [2022-03-19 23:28:34,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:28:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2426 transitions. [2022-03-19 23:28:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:28:34,171 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:34,171 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:34,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:34,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-19 23:28:34,383 INFO L403 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1815330922, now seen corresponding path program 139 times [2022-03-19 23:28:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784890741] [2022-03-19 23:28:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:34,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:34,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:34,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:34,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:28:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:28:35,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:35,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784890741] [2022-03-19 23:28:35,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784890741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:35,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257042654] [2022-03-19 23:28:35,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:28:35,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:35,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:35,316 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:28:35,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-19 23:28:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:35,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-19 23:28:35,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:28:35,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:28:35,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257042654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:35,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:35,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 55 [2022-03-19 23:28:35,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759994015] [2022-03-19 23:28:35,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:35,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 23:28:35,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 23:28:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2853, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:28:35,986 INFO L87 Difference]: Start difference. First operand 2212 states and 2426 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:28:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:40,910 INFO L93 Difference]: Finished difference Result 2412 states and 2647 transitions. [2022-03-19 23:28:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 23:28:40,911 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-19 23:28:40,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:40,935 INFO L225 Difference]: With dead ends: 2412 [2022-03-19 23:28:40,935 INFO L226 Difference]: Without dead ends: 2406 [2022-03-19 23:28:40,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=337, Invalid=9965, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 23:28:40,966 INFO L913 BasicCegarLoop]: 181 mSDtfsCounter, 400 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 12823 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 12893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 12823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:40,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 413 Invalid, 12893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 12823 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-19 23:28:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2022-03-19 23:28:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2228. [2022-03-19 23:28:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2021 states have (on average 1.106877783275606) internal successors, (2237), 2153 states have internal predecessors, (2237), 71 states have call successors, (71), 5 states have call predecessors, (71), 135 states have return successors, (137), 69 states have call predecessors, (137), 69 states have call successors, (137) [2022-03-19 23:28:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2445 transitions. [2022-03-19 23:28:42,368 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2445 transitions. Word has length 67 [2022-03-19 23:28:42,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:42,368 INFO L478 AbstractCegarLoop]: Abstraction has 2228 states and 2445 transitions. [2022-03-19 23:28:42,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:28:42,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2445 transitions. [2022-03-19 23:28:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:28:42,396 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:42,396 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:42,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-19 23:28:42,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-19 23:28:42,611 INFO L403 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1329996490, now seen corresponding path program 140 times [2022-03-19 23:28:42,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:42,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404793808] [2022-03-19 23:28:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:42,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:42,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:42,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:42,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:28:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:28:43,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404793808] [2022-03-19 23:28:43,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404793808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137062916] [2022-03-19 23:28:43,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:28:43,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:43,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:43,575 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:28:43,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-19 23:28:43,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:28:43,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:43,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 23:28:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:28:44,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:28:44,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137062916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:44,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:44,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 55 [2022-03-19 23:28:44,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056547427] [2022-03-19 23:28:44,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:44,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 23:28:44,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 23:28:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2849, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:28:44,545 INFO L87 Difference]: Start difference. First operand 2228 states and 2445 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:28:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:48,954 INFO L93 Difference]: Finished difference Result 2234 states and 2450 transitions. [2022-03-19 23:28:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 23:28:48,954 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-19 23:28:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:48,966 INFO L225 Difference]: With dead ends: 2234 [2022-03-19 23:28:48,967 INFO L226 Difference]: Without dead ends: 2212 [2022-03-19 23:28:48,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=339, Invalid=9561, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 23:28:48,991 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 314 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 11957 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 12008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 11957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:48,991 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 403 Invalid, 12008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 11957 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 23:28:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2022-03-19 23:28:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2212. [2022-03-19 23:28:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2008 states have (on average 1.1065737051792828) internal successors, (2222), 2138 states have internal predecessors, (2222), 70 states have call successors, (70), 5 states have call predecessors, (70), 133 states have return successors, (135), 68 states have call predecessors, (135), 68 states have call successors, (135) [2022-03-19 23:28:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2427 transitions. [2022-03-19 23:28:50,464 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2427 transitions. Word has length 67 [2022-03-19 23:28:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:50,464 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2427 transitions. [2022-03-19 23:28:50,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:28:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2427 transitions. [2022-03-19 23:28:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:28:50,489 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:50,489 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:50,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:50,705 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:50,706 INFO L403 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:50,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:50,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1769464598, now seen corresponding path program 141 times [2022-03-19 23:28:50,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:50,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38005050] [2022-03-19 23:28:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:50,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:50,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:50,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:51,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:28:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:28:51,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:51,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38005050] [2022-03-19 23:28:51,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38005050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:51,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356479427] [2022-03-19 23:28:51,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:28:51,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:51,451 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:28:51,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-19 23:28:51,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-19 23:28:51,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:51,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 23:28:51,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:28:52,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:28:52,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356479427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:52,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:52,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 55 [2022-03-19 23:28:52,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040883385] [2022-03-19 23:28:52,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:52,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 23:28:52,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:52,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 23:28:52,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2845, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:28:52,554 INFO L87 Difference]: Start difference. First operand 2212 states and 2427 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:28:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:57,141 INFO L93 Difference]: Finished difference Result 2218 states and 2432 transitions. [2022-03-19 23:28:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 23:28:57,142 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-19 23:28:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:57,153 INFO L225 Difference]: With dead ends: 2218 [2022-03-19 23:28:57,154 INFO L226 Difference]: Without dead ends: 2194 [2022-03-19 23:28:57,176 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=341, Invalid=9165, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 23:28:57,177 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 275 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 9663 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 9713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 9663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:57,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 363 Invalid, 9713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 9663 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 23:28:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2022-03-19 23:28:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2194. [2022-03-19 23:28:58,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1993 states have (on average 1.1063723030607124) internal successors, (2205), 2121 states have internal predecessors, (2205), 69 states have call successors, (69), 5 states have call predecessors, (69), 131 states have return successors, (133), 67 states have call predecessors, (133), 67 states have call successors, (133) [2022-03-19 23:28:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2407 transitions. [2022-03-19 23:28:58,527 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2407 transitions. Word has length 67 [2022-03-19 23:28:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:58,527 INFO L478 AbstractCegarLoop]: Abstraction has 2194 states and 2407 transitions. [2022-03-19 23:28:58,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:28:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2407 transitions. [2022-03-19 23:28:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:28:58,553 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:58,553 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:58,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:58,769 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:58,769 INFO L403 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:58,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:58,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1039746634, now seen corresponding path program 142 times [2022-03-19 23:28:58,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:58,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655988239] [2022-03-19 23:28:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:58,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:58,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:58,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:59,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:28:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:28:59,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:59,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655988239] [2022-03-19 23:28:59,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655988239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:59,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329330966] [2022-03-19 23:28:59,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:28:59,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:59,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:59,458 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:28:59,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-19 23:28:59,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:28:59,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:59,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 23:28:59,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:29:00,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:29:00,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329330966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:00,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:00,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 55 [2022-03-19 23:29:00,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120505480] [2022-03-19 23:29:00,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:00,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 23:29:00,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:00,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 23:29:00,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2841, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:29:00,304 INFO L87 Difference]: Start difference. First operand 2194 states and 2407 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:29:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:04,070 INFO L93 Difference]: Finished difference Result 2200 states and 2412 transitions. [2022-03-19 23:29:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 23:29:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-19 23:29:04,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:04,082 INFO L225 Difference]: With dead ends: 2200 [2022-03-19 23:29:04,082 INFO L226 Difference]: Without dead ends: 2174 [2022-03-19 23:29:04,105 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=343, Invalid=8777, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 23:29:04,106 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 236 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 8178 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 8226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 8178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:04,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 338 Invalid, 8226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 8178 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 23:29:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-03-19 23:29:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2174. [2022-03-19 23:29:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 1976 states have (on average 1.1062753036437247) internal successors, (2186), 2102 states have internal predecessors, (2186), 68 states have call successors, (68), 5 states have call predecessors, (68), 129 states have return successors, (131), 66 states have call predecessors, (131), 66 states have call successors, (131) [2022-03-19 23:29:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 2385 transitions. [2022-03-19 23:29:05,463 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 2385 transitions. Word has length 67 [2022-03-19 23:29:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:05,463 INFO L478 AbstractCegarLoop]: Abstraction has 2174 states and 2385 transitions. [2022-03-19 23:29:05,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:29:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 2385 transitions. [2022-03-19 23:29:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:29:05,485 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:05,485 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:05,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-19 23:29:05,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:05,699 INFO L403 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:05,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:05,699 INFO L85 PathProgramCache]: Analyzing trace with hash -125863574, now seen corresponding path program 143 times [2022-03-19 23:29:05,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:05,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176790656] [2022-03-19 23:29:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:05,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:05,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:05,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:06,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:29:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:29:06,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:06,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176790656] [2022-03-19 23:29:06,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176790656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:06,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424021875] [2022-03-19 23:29:06,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:29:06,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:06,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:06,509 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:29:06,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-19 23:29:06,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:29:06,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:06,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 23:29:06,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:29:07,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:29:07,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424021875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:07,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:07,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 55 [2022-03-19 23:29:07,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123290419] [2022-03-19 23:29:07,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:07,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 23:29:07,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:07,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 23:29:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2837, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:29:07,460 INFO L87 Difference]: Start difference. First operand 2174 states and 2385 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:29:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:10,599 INFO L93 Difference]: Finished difference Result 2180 states and 2390 transitions. [2022-03-19 23:29:10,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 23:29:10,599 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-19 23:29:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:10,610 INFO L225 Difference]: With dead ends: 2180 [2022-03-19 23:29:10,610 INFO L226 Difference]: Without dead ends: 2152 [2022-03-19 23:29:10,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=345, Invalid=8397, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 23:29:10,634 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 198 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6573 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 6619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:10,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 308 Invalid, 6619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6573 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:29:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-03-19 23:29:11,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 2152. [2022-03-19 23:29:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1957 states have (on average 1.1062851303014818) internal successors, (2165), 2081 states have internal predecessors, (2165), 67 states have call successors, (67), 5 states have call predecessors, (67), 127 states have return successors, (129), 65 states have call predecessors, (129), 65 states have call successors, (129) [2022-03-19 23:29:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2361 transitions. [2022-03-19 23:29:11,964 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2361 transitions. Word has length 67 [2022-03-19 23:29:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:11,964 INFO L478 AbstractCegarLoop]: Abstraction has 2152 states and 2361 transitions. [2022-03-19 23:29:11,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:29:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2361 transitions. [2022-03-19 23:29:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:29:11,990 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:11,990 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:12,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-19 23:29:12,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:12,205 INFO L403 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash 933587402, now seen corresponding path program 144 times [2022-03-19 23:29:12,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:12,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456231914] [2022-03-19 23:29:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:12,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:12,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:12,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:12,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:29:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:29:12,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:12,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456231914] [2022-03-19 23:29:12,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456231914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:12,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924709083] [2022-03-19 23:29:12,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:29:12,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:12,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:12,634 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:29:12,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-19 23:29:12,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 23:29:12,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 23:29:12,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:29:13,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:29:13,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924709083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:13,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:13,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 55 [2022-03-19 23:29:13,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564800518] [2022-03-19 23:29:13,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:13,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 23:29:13,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:13,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 23:29:13,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2833, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:29:13,529 INFO L87 Difference]: Start difference. First operand 2152 states and 2361 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:29:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:16,937 INFO L93 Difference]: Finished difference Result 2158 states and 2366 transitions. [2022-03-19 23:29:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 23:29:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-19 23:29:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:16,950 INFO L225 Difference]: With dead ends: 2158 [2022-03-19 23:29:16,950 INFO L226 Difference]: Without dead ends: 2128 [2022-03-19 23:29:16,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=347, Invalid=8025, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 23:29:16,985 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 159 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5466 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 5510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:16,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 293 Invalid, 5510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5466 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 23:29:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2022-03-19 23:29:18,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 2128. [2022-03-19 23:29:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1936 states have (on average 1.1064049586776858) internal successors, (2142), 2058 states have internal predecessors, (2142), 66 states have call successors, (66), 5 states have call predecessors, (66), 125 states have return successors, (127), 64 states have call predecessors, (127), 64 states have call successors, (127) [2022-03-19 23:29:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 2335 transitions. [2022-03-19 23:29:18,307 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 2335 transitions. Word has length 67 [2022-03-19 23:29:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:18,307 INFO L478 AbstractCegarLoop]: Abstraction has 2128 states and 2335 transitions. [2022-03-19 23:29:18,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:29:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 2335 transitions. [2022-03-19 23:29:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:29:18,331 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:18,332 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:18,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-03-19 23:29:18,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:18,533 INFO L403 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:18,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:18,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1461594646, now seen corresponding path program 145 times [2022-03-19 23:29:18,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:18,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57800656] [2022-03-19 23:29:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:18,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:18,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:18,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:18,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:29:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:29:19,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:19,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57800656] [2022-03-19 23:29:19,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57800656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:19,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627614279] [2022-03-19 23:29:19,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:29:19,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:19,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:19,211 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:29:19,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-19 23:29:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:19,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:29:19,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:29:20,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:29:20,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627614279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:20,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:20,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 55 [2022-03-19 23:29:20,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395368532] [2022-03-19 23:29:20,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:20,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 23:29:20,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 23:29:20,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2829, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:29:20,338 INFO L87 Difference]: Start difference. First operand 2128 states and 2335 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:29:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:23,406 INFO L93 Difference]: Finished difference Result 2134 states and 2340 transitions. [2022-03-19 23:29:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 23:29:23,406 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-19 23:29:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:23,418 INFO L225 Difference]: With dead ends: 2134 [2022-03-19 23:29:23,418 INFO L226 Difference]: Without dead ends: 2102 [2022-03-19 23:29:23,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=349, Invalid=7661, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 23:29:23,451 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 121 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3870 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 3914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:23,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 255 Invalid, 3914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3870 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:29:23,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-03-19 23:29:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 2102. [2022-03-19 23:29:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 1913 states have (on average 1.1066387872451646) internal successors, (2117), 2033 states have internal predecessors, (2117), 65 states have call successors, (65), 5 states have call predecessors, (65), 123 states have return successors, (125), 63 states have call predecessors, (125), 63 states have call successors, (125) [2022-03-19 23:29:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2307 transitions. [2022-03-19 23:29:24,816 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2307 transitions. Word has length 67 [2022-03-19 23:29:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:24,816 INFO L478 AbstractCegarLoop]: Abstraction has 2102 states and 2307 transitions. [2022-03-19 23:29:24,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:29:24,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2307 transitions. [2022-03-19 23:29:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:29:24,837 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:24,837 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:24,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-19 23:29:25,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:25,044 INFO L403 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:25,044 INFO L85 PathProgramCache]: Analyzing trace with hash 528374587, now seen corresponding path program 146 times [2022-03-19 23:29:25,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:25,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632117741] [2022-03-19 23:29:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:25,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:25,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:25,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:25,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:29:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-19 23:29:25,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:25,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632117741] [2022-03-19 23:29:25,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632117741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:25,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894544660] [2022-03-19 23:29:25,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:29:25,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:25,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:25,507 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:29:25,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-19 23:29:25,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:29:25,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:25,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 23:29:25,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-19 23:29:26,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-19 23:29:26,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894544660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:26,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:26,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 63 [2022-03-19 23:29:26,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593528641] [2022-03-19 23:29:26,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:26,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-19 23:29:26,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:26,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-19 23:29:26,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3680, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 23:29:26,817 INFO L87 Difference]: Start difference. First operand 2102 states and 2307 transitions. Second operand has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:30,803 INFO L93 Difference]: Finished difference Result 2238 states and 2473 transitions. [2022-03-19 23:29:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 23:29:30,804 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-03-19 23:29:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:30,899 INFO L225 Difference]: With dead ends: 2238 [2022-03-19 23:29:30,899 INFO L226 Difference]: Without dead ends: 2217 [2022-03-19 23:29:30,928 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=677, Invalid=9025, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 23:29:30,929 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 1316 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 5915 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 6042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 5915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:30,929 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1320 Valid, 286 Invalid, 6042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 5915 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 23:29:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2022-03-19 23:29:32,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2212. [2022-03-19 23:29:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1978 states have (on average 1.10262891809909) internal successors, (2181), 2128 states have internal predecessors, (2181), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (170), 78 states have call predecessors, (170), 78 states have call successors, (170) [2022-03-19 23:29:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2431 transitions. [2022-03-19 23:29:32,373 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2431 transitions. Word has length 67 [2022-03-19 23:29:32,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:32,373 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2431 transitions. [2022-03-19 23:29:32,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:32,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2431 transitions. [2022-03-19 23:29:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:29:32,398 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:32,398 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:32,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-19 23:29:32,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-19 23:29:32,615 INFO L403 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:32,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1568836938, now seen corresponding path program 147 times [2022-03-19 23:29:32,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:32,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071087438] [2022-03-19 23:29:32,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:32,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:32,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:32,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:32,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:29:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:29:33,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:33,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071087438] [2022-03-19 23:29:33,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071087438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:33,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664210792] [2022-03-19 23:29:33,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:29:33,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:33,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:33,084 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:29:33,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-19 23:29:33,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 23:29:33,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:29:33,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:29:34,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:29:34,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664210792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:34,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:34,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 55 [2022-03-19 23:29:34,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609773618] [2022-03-19 23:29:34,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:34,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 23:29:34,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 23:29:34,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2825, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:29:34,471 INFO L87 Difference]: Start difference. First operand 2212 states and 2431 transitions. Second operand has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:29:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:36,992 INFO L93 Difference]: Finished difference Result 2230 states and 2453 transitions. [2022-03-19 23:29:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 23:29:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-03-19 23:29:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:37,014 INFO L225 Difference]: With dead ends: 2230 [2022-03-19 23:29:37,015 INFO L226 Difference]: Without dead ends: 2209 [2022-03-19 23:29:37,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=351, Invalid=7305, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 23:29:37,055 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 2953 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:37,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 248 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2953 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 23:29:37,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-03-19 23:29:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2204. [2022-03-19 23:29:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 1970 states have (on average 1.1035532994923858) internal successors, (2174), 2120 states have internal predecessors, (2174), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (170), 78 states have call predecessors, (170), 78 states have call successors, (170) [2022-03-19 23:29:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2424 transitions. [2022-03-19 23:29:38,619 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2424 transitions. Word has length 67 [2022-03-19 23:29:38,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:38,619 INFO L478 AbstractCegarLoop]: Abstraction has 2204 states and 2424 transitions. [2022-03-19 23:29:38,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 49 states have internal predecessors, (67), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:29:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2424 transitions. [2022-03-19 23:29:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:29:38,645 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:38,645 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:38,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-19 23:29:38,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-19 23:29:38,860 INFO L403 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:38,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1013254207, now seen corresponding path program 148 times [2022-03-19 23:29:38,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:38,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199087489] [2022-03-19 23:29:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:38,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:38,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:38,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:39,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:29:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-19 23:29:39,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:39,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199087489] [2022-03-19 23:29:39,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199087489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:39,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260922] [2022-03-19 23:29:39,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:29:39,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:39,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:39,218 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:29:39,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-19 23:29:39,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:29:39,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 23:29:39,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-19 23:29:40,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-19 23:29:40,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:40,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:40,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 63 [2022-03-19 23:29:40,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35976194] [2022-03-19 23:29:40,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:40,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-19 23:29:40,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:40,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-19 23:29:40,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3680, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 23:29:40,926 INFO L87 Difference]: Start difference. First operand 2204 states and 2424 transitions. Second operand has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:45,537 INFO L93 Difference]: Finished difference Result 2218 states and 2437 transitions. [2022-03-19 23:29:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 23:29:45,556 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-03-19 23:29:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:45,569 INFO L225 Difference]: With dead ends: 2218 [2022-03-19 23:29:45,569 INFO L226 Difference]: Without dead ends: 2186 [2022-03-19 23:29:45,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=677, Invalid=9025, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 23:29:45,596 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 1309 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 5412 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 5521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 5412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:45,596 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1326 Valid, 272 Invalid, 5521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 5412 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 23:29:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2022-03-19 23:29:46,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2022-03-19 23:29:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 1950 states have (on average 1.1035897435897435) internal successors, (2152), 2100 states have internal predecessors, (2152), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (156), 78 states have call predecessors, (156), 78 states have call successors, (156) [2022-03-19 23:29:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 2388 transitions. [2022-03-19 23:29:46,918 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 2388 transitions. Word has length 67 [2022-03-19 23:29:46,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:46,918 INFO L478 AbstractCegarLoop]: Abstraction has 2184 states and 2388 transitions. [2022-03-19 23:29:46,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 62 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:46,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 2388 transitions. [2022-03-19 23:29:46,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 23:29:46,942 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:46,942 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:46,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-19 23:29:47,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-19 23:29:47,157 INFO L403 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:47,157 INFO L85 PathProgramCache]: Analyzing trace with hash -578788689, now seen corresponding path program 149 times [2022-03-19 23:29:47,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:47,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985010060] [2022-03-19 23:29:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:47,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:47,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:47,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:47,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:29:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:29:48,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:48,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985010060] [2022-03-19 23:29:48,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985010060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:48,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135763822] [2022-03-19 23:29:48,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:29:48,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:48,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:48,010 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:29:48,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-19 23:29:48,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-19 23:29:48,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:48,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 23:29:48,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:29:49,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:29:52,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135763822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:52,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:52,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 109 [2022-03-19 23:29:52,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094792114] [2022-03-19 23:29:52,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:52,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-19 23:29:52,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:52,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-19 23:29:52,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=11403, Unknown=0, NotChecked=0, Total=11772 [2022-03-19 23:29:52,077 INFO L87 Difference]: Start difference. First operand 2184 states and 2388 transitions. Second operand has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:03,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:03,993 INFO L93 Difference]: Finished difference Result 2390 states and 2627 transitions. [2022-03-19 23:30:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 23:30:03,994 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-03-19 23:30:03,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:04,041 INFO L225 Difference]: With dead ends: 2390 [2022-03-19 23:30:04,041 INFO L226 Difference]: Without dead ends: 2376 [2022-03-19 23:30:04,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1608, Invalid=29544, Unknown=0, NotChecked=0, Total=31152 [2022-03-19 23:30:04,074 INFO L913 BasicCegarLoop]: 184 mSDtfsCounter, 3404 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 15871 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 16232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 15871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:04,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3409 Valid, 486 Invalid, 16232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 15871 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-03-19 23:30:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-03-19 23:30:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2367. [2022-03-19 23:30:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2112 states have (on average 1.103219696969697) internal successors, (2330), 2276 states have internal predecessors, (2330), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (177), 85 states have call predecessors, (177), 85 states have call successors, (177) [2022-03-19 23:30:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 2594 transitions. [2022-03-19 23:30:05,607 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 2594 transitions. Word has length 68 [2022-03-19 23:30:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:05,607 INFO L478 AbstractCegarLoop]: Abstraction has 2367 states and 2594 transitions. [2022-03-19 23:30:05,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 2594 transitions. [2022-03-19 23:30:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 23:30:05,634 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:05,634 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:05,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-19 23:30:05,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-19 23:30:05,851 INFO L403 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1079345620, now seen corresponding path program 150 times [2022-03-19 23:30:05,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:05,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832867757] [2022-03-19 23:30:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:05,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:05,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:05,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:06,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:30:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:30:06,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:06,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832867757] [2022-03-19 23:30:06,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832867757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:06,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851874121] [2022-03-19 23:30:06,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:30:06,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:06,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:06,596 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:30:06,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-19 23:30:06,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 23:30:06,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 23:30:06,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:30:07,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:30:09,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851874121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:09,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:09,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 109 [2022-03-19 23:30:09,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911966193] [2022-03-19 23:30:09,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:09,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-19 23:30:09,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:09,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-19 23:30:09,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=11403, Unknown=0, NotChecked=0, Total=11772 [2022-03-19 23:30:09,561 INFO L87 Difference]: Start difference. First operand 2367 states and 2594 transitions. Second operand has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:20,283 INFO L93 Difference]: Finished difference Result 2382 states and 2609 transitions. [2022-03-19 23:30:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 23:30:20,284 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-03-19 23:30:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:20,299 INFO L225 Difference]: With dead ends: 2382 [2022-03-19 23:30:20,300 INFO L226 Difference]: Without dead ends: 2370 [2022-03-19 23:30:20,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4663 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1608, Invalid=29544, Unknown=0, NotChecked=0, Total=31152 [2022-03-19 23:30:20,334 INFO L913 BasicCegarLoop]: 188 mSDtfsCounter, 3487 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 16182 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3520 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 16511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 16182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:20,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3520 Valid, 485 Invalid, 16511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 16182 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-19 23:30:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-03-19 23:30:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2368. [2022-03-19 23:30:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2113 states have (on average 1.1031708471367723) internal successors, (2331), 2277 states have internal predecessors, (2331), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (169), 85 states have call predecessors, (169), 85 states have call successors, (169) [2022-03-19 23:30:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 2587 transitions. [2022-03-19 23:30:21,865 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 2587 transitions. Word has length 68 [2022-03-19 23:30:21,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:21,866 INFO L478 AbstractCegarLoop]: Abstraction has 2368 states and 2587 transitions. [2022-03-19 23:30:21,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:21,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 2587 transitions. [2022-03-19 23:30:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 23:30:21,894 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:21,894 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:21,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-19 23:30:22,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:22,095 INFO L403 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:22,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1538600402, now seen corresponding path program 151 times [2022-03-19 23:30:22,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:22,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926839020] [2022-03-19 23:30:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:22,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:22,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:22,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:22,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 23:30:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:30:22,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:22,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926839020] [2022-03-19 23:30:22,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926839020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:22,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519345566] [2022-03-19 23:30:22,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:30:22,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:22,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:22,256 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:30:22,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-19 23:30:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:22,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 23:30:22,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:30:22,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:30:22,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519345566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:22,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:22,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 31 [2022-03-19 23:30:22,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595926865] [2022-03-19 23:30:22,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:22,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 23:30:22,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:22,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 23:30:22,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:30:22,620 INFO L87 Difference]: Start difference. First operand 2368 states and 2587 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:30:24,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:24,804 INFO L93 Difference]: Finished difference Result 3558 states and 3832 transitions. [2022-03-19 23:30:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 23:30:24,805 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-03-19 23:30:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:24,908 INFO L225 Difference]: With dead ends: 3558 [2022-03-19 23:30:24,908 INFO L226 Difference]: Without dead ends: 2373 [2022-03-19 23:30:24,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2226, Invalid=5084, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 23:30:24,946 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 138 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:24,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 81 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:30:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2022-03-19 23:30:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2365. [2022-03-19 23:30:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2116 states have (on average 1.1011342155009451) internal successors, (2330), 2276 states have internal predecessors, (2330), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (163), 83 states have call predecessors, (163), 83 states have call successors, (163) [2022-03-19 23:30:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 2578 transitions. [2022-03-19 23:30:26,597 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 2578 transitions. Word has length 68 [2022-03-19 23:30:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:26,597 INFO L478 AbstractCegarLoop]: Abstraction has 2365 states and 2578 transitions. [2022-03-19 23:30:26,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:30:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 2578 transitions. [2022-03-19 23:30:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 23:30:26,623 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:26,623 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:26,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-19 23:30:26,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-03-19 23:30:26,839 INFO L403 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:26,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:26,840 INFO L85 PathProgramCache]: Analyzing trace with hash 504471117, now seen corresponding path program 152 times [2022-03-19 23:30:26,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:26,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573532214] [2022-03-19 23:30:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:26,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:26,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:26,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:26,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:30:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:30:27,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573532214] [2022-03-19 23:30:27,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573532214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826589829] [2022-03-19 23:30:27,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:30:27,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:27,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:27,020 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:30:27,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-19 23:30:27,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:30:27,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:27,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 23:30:27,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:30:27,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:30:27,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826589829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:27,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:27,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 31 [2022-03-19 23:30:27,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660734795] [2022-03-19 23:30:27,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:27,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 23:30:27,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:27,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 23:30:27,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:30:27,515 INFO L87 Difference]: Start difference. First operand 2365 states and 2578 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:30:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:30,059 INFO L93 Difference]: Finished difference Result 2439 states and 2668 transitions. [2022-03-19 23:30:30,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 23:30:30,059 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2022-03-19 23:30:30,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:30,075 INFO L225 Difference]: With dead ends: 2439 [2022-03-19 23:30:30,075 INFO L226 Difference]: Without dead ends: 2382 [2022-03-19 23:30:30,124 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2226, Invalid=5084, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 23:30:30,124 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 168 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:30,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 70 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:30:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-03-19 23:30:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2382. [2022-03-19 23:30:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2133 states have (on average 1.1003281762775434) internal successors, (2347), 2293 states have internal predecessors, (2347), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (163), 83 states have call predecessors, (163), 83 states have call successors, (163) [2022-03-19 23:30:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 2595 transitions. [2022-03-19 23:30:31,705 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 2595 transitions. Word has length 68 [2022-03-19 23:30:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:31,705 INFO L478 AbstractCegarLoop]: Abstraction has 2382 states and 2595 transitions. [2022-03-19 23:30:31,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:30:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 2595 transitions. [2022-03-19 23:30:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:30:31,738 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:31,738 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:31,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-19 23:30:31,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:31,951 INFO L403 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash -119448275, now seen corresponding path program 153 times [2022-03-19 23:30:31,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:31,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559215397] [2022-03-19 23:30:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:31,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:32,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:32,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:32,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:30:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:30:32,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:32,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559215397] [2022-03-19 23:30:32,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559215397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:32,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979874647] [2022-03-19 23:30:32,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:30:32,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:32,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:32,950 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:30:32,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-19 23:30:33,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-19 23:30:33,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:33,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-19 23:30:33,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:30:33,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:30:33,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979874647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:33,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:33,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 57 [2022-03-19 23:30:33,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552628856] [2022-03-19 23:30:33,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:33,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:30:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:33,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:30:33,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3071, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:30:33,876 INFO L87 Difference]: Start difference. First operand 2382 states and 2595 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:30:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:39,862 INFO L93 Difference]: Finished difference Result 2590 states and 2824 transitions. [2022-03-19 23:30:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 23:30:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-19 23:30:39,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:39,887 INFO L225 Difference]: With dead ends: 2590 [2022-03-19 23:30:39,887 INFO L226 Difference]: Without dead ends: 2584 [2022-03-19 23:30:39,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=349, Invalid=10781, Unknown=0, NotChecked=0, Total=11130 [2022-03-19 23:30:39,938 INFO L913 BasicCegarLoop]: 189 mSDtfsCounter, 421 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 14344 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 14418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 14344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:39,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 436 Invalid, 14418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 14344 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-19 23:30:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-03-19 23:30:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2398. [2022-03-19 23:30:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2146 states have (on average 1.1006523765144456) internal successors, (2362), 2308 states have internal predecessors, (2362), 86 states have call successors, (86), 5 states have call predecessors, (86), 165 states have return successors, (166), 84 states have call predecessors, (166), 84 states have call successors, (166) [2022-03-19 23:30:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 2614 transitions. [2022-03-19 23:30:41,709 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 2614 transitions. Word has length 69 [2022-03-19 23:30:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:41,709 INFO L478 AbstractCegarLoop]: Abstraction has 2398 states and 2614 transitions. [2022-03-19 23:30:41,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:30:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 2614 transitions. [2022-03-19 23:30:41,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:30:41,743 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:41,743 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:41,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-19 23:30:41,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:41,959 INFO L403 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:41,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:41,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1262505363, now seen corresponding path program 154 times [2022-03-19 23:30:41,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:41,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056566269] [2022-03-19 23:30:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:41,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:42,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:42,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:42,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:30:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:30:42,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:42,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056566269] [2022-03-19 23:30:42,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056566269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:42,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387628509] [2022-03-19 23:30:42,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:30:42,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:42,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:42,588 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:30:42,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-19 23:30:42,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:30:42,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-19 23:30:42,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:30:43,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:30:43,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387628509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:43,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:43,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 57 [2022-03-19 23:30:43,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261743] [2022-03-19 23:30:43,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:43,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:30:43,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:43,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:30:43,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3067, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:30:43,343 INFO L87 Difference]: Start difference. First operand 2398 states and 2614 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:30:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:49,098 INFO L93 Difference]: Finished difference Result 2404 states and 2619 transitions. [2022-03-19 23:30:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 23:30:49,098 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-19 23:30:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:49,114 INFO L225 Difference]: With dead ends: 2404 [2022-03-19 23:30:49,114 INFO L226 Difference]: Without dead ends: 2382 [2022-03-19 23:30:49,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 126 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=351, Invalid=10361, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 23:30:49,146 INFO L913 BasicCegarLoop]: 174 mSDtfsCounter, 330 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 13177 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 13228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 13177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:49,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 421 Invalid, 13228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 13177 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-19 23:30:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-03-19 23:30:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2382. [2022-03-19 23:30:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2133 states have (on average 1.1003281762775434) internal successors, (2347), 2293 states have internal predecessors, (2347), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (164), 83 states have call predecessors, (164), 83 states have call successors, (164) [2022-03-19 23:30:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 2596 transitions. [2022-03-19 23:30:50,720 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 2596 transitions. Word has length 69 [2022-03-19 23:30:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:50,720 INFO L478 AbstractCegarLoop]: Abstraction has 2382 states and 2596 transitions. [2022-03-19 23:30:50,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:30:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 2596 transitions. [2022-03-19 23:30:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:30:50,750 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:50,751 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:50,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-19 23:30:50,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:50,969 INFO L403 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:50,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:50,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1781210413, now seen corresponding path program 155 times [2022-03-19 23:30:50,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:50,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856766748] [2022-03-19 23:30:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:50,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:51,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:51,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:51,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:30:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:30:51,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:51,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856766748] [2022-03-19 23:30:51,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856766748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623936922] [2022-03-19 23:30:51,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:30:51,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:51,801 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:30:51,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-19 23:30:51,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-19 23:30:51,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:51,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 23:30:51,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:30:52,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:30:53,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623936922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:53,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:53,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 57 [2022-03-19 23:30:53,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239075240] [2022-03-19 23:30:53,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:53,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:30:53,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:53,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:30:53,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=3063, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:30:53,016 INFO L87 Difference]: Start difference. First operand 2382 states and 2596 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:30:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:58,661 INFO L93 Difference]: Finished difference Result 2388 states and 2601 transitions. [2022-03-19 23:30:58,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 23:30:58,662 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-19 23:30:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:58,677 INFO L225 Difference]: With dead ends: 2388 [2022-03-19 23:30:58,677 INFO L226 Difference]: Without dead ends: 2364 [2022-03-19 23:30:58,710 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=353, Invalid=9949, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 23:30:58,711 INFO L913 BasicCegarLoop]: 154 mSDtfsCounter, 291 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 10534 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 10584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 10534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:58,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 376 Invalid, 10584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 10534 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-19 23:30:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2022-03-19 23:31:00,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2022-03-19 23:31:00,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2118 states have (on average 1.1000944287063268) internal successors, (2330), 2276 states have internal predecessors, (2330), 84 states have call successors, (84), 5 states have call predecessors, (84), 161 states have return successors, (162), 82 states have call predecessors, (162), 82 states have call successors, (162) [2022-03-19 23:31:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 2576 transitions. [2022-03-19 23:31:00,261 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 2576 transitions. Word has length 69 [2022-03-19 23:31:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:00,262 INFO L478 AbstractCegarLoop]: Abstraction has 2364 states and 2576 transitions. [2022-03-19 23:31:00,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 2576 transitions. [2022-03-19 23:31:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:31:00,292 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:00,292 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:00,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-19 23:31:00,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:00,508 INFO L403 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:00,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1268059539, now seen corresponding path program 156 times [2022-03-19 23:31:00,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:00,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234000133] [2022-03-19 23:31:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:00,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:00,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:00,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:00,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:31:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:31:01,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:01,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234000133] [2022-03-19 23:31:01,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234000133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:01,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198386405] [2022-03-19 23:31:01,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:31:01,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:01,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:01,373 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:01,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-19 23:31:01,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 23:31:01,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:01,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 23:31:01,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:31:02,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:31:02,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198386405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:02,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:02,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 57 [2022-03-19 23:31:02,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033169670] [2022-03-19 23:31:02,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:02,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:31:02,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:31:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=3059, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:31:02,754 INFO L87 Difference]: Start difference. First operand 2364 states and 2576 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:07,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:07,196 INFO L93 Difference]: Finished difference Result 2370 states and 2581 transitions. [2022-03-19 23:31:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 23:31:07,197 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-19 23:31:07,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:07,212 INFO L225 Difference]: With dead ends: 2370 [2022-03-19 23:31:07,212 INFO L226 Difference]: Without dead ends: 2344 [2022-03-19 23:31:07,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=355, Invalid=9545, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 23:31:07,247 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 251 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 9844 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 9892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 9844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:07,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 371 Invalid, 9892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 9844 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 23:31:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-03-19 23:31:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2344. [2022-03-19 23:31:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2101 states have (on average 1.0999524036173252) internal successors, (2311), 2257 states have internal predecessors, (2311), 83 states have call successors, (83), 5 states have call predecessors, (83), 159 states have return successors, (160), 81 states have call predecessors, (160), 81 states have call successors, (160) [2022-03-19 23:31:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 2554 transitions. [2022-03-19 23:31:08,880 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 2554 transitions. Word has length 69 [2022-03-19 23:31:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:08,881 INFO L478 AbstractCegarLoop]: Abstraction has 2344 states and 2554 transitions. [2022-03-19 23:31:08,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 2554 transitions. [2022-03-19 23:31:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:31:08,909 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:08,909 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:08,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-19 23:31:09,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:09,123 INFO L403 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1400185555, now seen corresponding path program 157 times [2022-03-19 23:31:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:09,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700023017] [2022-03-19 23:31:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:09,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:09,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:09,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:31:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:31:09,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:09,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700023017] [2022-03-19 23:31:09,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700023017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:09,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300796014] [2022-03-19 23:31:09,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:31:09,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:09,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:09,821 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:09,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-19 23:31:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 23:31:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:31:10,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:31:10,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300796014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:10,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:10,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 57 [2022-03-19 23:31:10,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584235960] [2022-03-19 23:31:10,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:10,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:31:10,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:31:10,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:31:10,803 INFO L87 Difference]: Start difference. First operand 2344 states and 2554 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:14,827 INFO L93 Difference]: Finished difference Result 2350 states and 2559 transitions. [2022-03-19 23:31:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 23:31:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-19 23:31:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:14,842 INFO L225 Difference]: With dead ends: 2350 [2022-03-19 23:31:14,842 INFO L226 Difference]: Without dead ends: 2322 [2022-03-19 23:31:14,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=357, Invalid=9149, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 23:31:14,893 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 213 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 8266 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 8312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 8266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:14,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 346 Invalid, 8312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 8266 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 23:31:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-03-19 23:31:16,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2322. [2022-03-19 23:31:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2082 states have (on average 1.0999039385206533) internal successors, (2290), 2236 states have internal predecessors, (2290), 82 states have call successors, (82), 5 states have call predecessors, (82), 157 states have return successors, (158), 80 states have call predecessors, (158), 80 states have call successors, (158) [2022-03-19 23:31:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 2530 transitions. [2022-03-19 23:31:16,482 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 2530 transitions. Word has length 69 [2022-03-19 23:31:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:16,483 INFO L478 AbstractCegarLoop]: Abstraction has 2322 states and 2530 transitions. [2022-03-19 23:31:16,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 2530 transitions. [2022-03-19 23:31:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:31:16,511 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:16,511 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:16,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:16,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-19 23:31:16,727 INFO L403 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash -788516243, now seen corresponding path program 158 times [2022-03-19 23:31:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:16,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261283050] [2022-03-19 23:31:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:16,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:16,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:16,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:16,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:31:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:31:17,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261283050] [2022-03-19 23:31:17,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261283050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519513048] [2022-03-19 23:31:17,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:31:17,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:17,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:17,355 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:17,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-19 23:31:17,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:31:17,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:17,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 23:31:17,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:31:18,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:31:18,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519513048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:18,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:18,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 57 [2022-03-19 23:31:18,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815635491] [2022-03-19 23:31:18,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:18,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:31:18,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:18,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:31:18,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3051, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:31:18,365 INFO L87 Difference]: Start difference. First operand 2322 states and 2530 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:21,932 INFO L93 Difference]: Finished difference Result 2328 states and 2535 transitions. [2022-03-19 23:31:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 23:31:21,932 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-19 23:31:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:21,947 INFO L225 Difference]: With dead ends: 2328 [2022-03-19 23:31:21,947 INFO L226 Difference]: Without dead ends: 2298 [2022-03-19 23:31:21,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=359, Invalid=8761, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 23:31:21,978 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 173 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 6633 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 6677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 6633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:21,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 316 Invalid, 6677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 6633 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 23:31:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-03-19 23:31:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2298. [2022-03-19 23:31:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2061 states have (on average 1.0999514798641437) internal successors, (2267), 2213 states have internal predecessors, (2267), 81 states have call successors, (81), 5 states have call predecessors, (81), 155 states have return successors, (156), 79 states have call predecessors, (156), 79 states have call successors, (156) [2022-03-19 23:31:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 2504 transitions. [2022-03-19 23:31:23,541 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 2504 transitions. Word has length 69 [2022-03-19 23:31:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:23,542 INFO L478 AbstractCegarLoop]: Abstraction has 2298 states and 2504 transitions. [2022-03-19 23:31:23,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 2504 transitions. [2022-03-19 23:31:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:31:23,566 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:23,566 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:23,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:23,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:23,779 INFO L403 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:23,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:23,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1006673197, now seen corresponding path program 159 times [2022-03-19 23:31:23,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:23,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127594258] [2022-03-19 23:31:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:23,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:23,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:23,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:24,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:31:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:31:24,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:24,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127594258] [2022-03-19 23:31:24,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127594258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:24,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224884819] [2022-03-19 23:31:24,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:31:24,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:24,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:24,406 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:24,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-19 23:31:24,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 23:31:24,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:24,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 23:31:24,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:31:25,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:31:25,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224884819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:25,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:25,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 57 [2022-03-19 23:31:25,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878600460] [2022-03-19 23:31:25,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:25,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:31:25,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:25,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:31:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3047, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:31:25,649 INFO L87 Difference]: Start difference. First operand 2298 states and 2504 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:28,989 INFO L93 Difference]: Finished difference Result 2304 states and 2509 transitions. [2022-03-19 23:31:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 23:31:28,989 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-19 23:31:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:29,006 INFO L225 Difference]: With dead ends: 2304 [2022-03-19 23:31:29,006 INFO L226 Difference]: Without dead ends: 2272 [2022-03-19 23:31:29,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=361, Invalid=8381, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 23:31:29,113 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 135 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5050 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 5092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:29,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 286 Invalid, 5092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5050 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 23:31:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2022-03-19 23:31:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2272. [2022-03-19 23:31:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2038 states have (on average 1.100098135426889) internal successors, (2242), 2188 states have internal predecessors, (2242), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (154), 78 states have call predecessors, (154), 78 states have call successors, (154) [2022-03-19 23:31:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2476 transitions. [2022-03-19 23:31:30,578 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2476 transitions. Word has length 69 [2022-03-19 23:31:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:30,578 INFO L478 AbstractCegarLoop]: Abstraction has 2272 states and 2476 transitions. [2022-03-19 23:31:30,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2476 transitions. [2022-03-19 23:31:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:31:30,601 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:30,601 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:30,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:30,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:30,815 INFO L403 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:30,815 INFO L85 PathProgramCache]: Analyzing trace with hash -562072979, now seen corresponding path program 160 times [2022-03-19 23:31:30,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:30,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527315232] [2022-03-19 23:31:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:30,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:30,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:30,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:31,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:31:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:31:31,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:31,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527315232] [2022-03-19 23:31:31,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527315232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:31,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937032462] [2022-03-19 23:31:31,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:31:31,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:31,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:31,349 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:31,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-19 23:31:31,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:31:31,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:31,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:31:31,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:31:32,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:31:32,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937032462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:32,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:32,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 57 [2022-03-19 23:31:32,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131178309] [2022-03-19 23:31:32,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:32,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:31:32,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:32,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:31:32,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:31:32,765 INFO L87 Difference]: Start difference. First operand 2272 states and 2476 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:35,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:35,897 INFO L93 Difference]: Finished difference Result 2278 states and 2481 transitions. [2022-03-19 23:31:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 23:31:35,898 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-19 23:31:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:35,914 INFO L225 Difference]: With dead ends: 2278 [2022-03-19 23:31:35,914 INFO L226 Difference]: Without dead ends: 2244 [2022-03-19 23:31:35,964 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=363, Invalid=8009, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 23:31:35,964 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3649 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:35,964 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 256 Invalid, 3689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3649 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 23:31:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2022-03-19 23:31:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2244. [2022-03-19 23:31:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2013 states have (on average 1.100347739692002) internal successors, (2215), 2161 states have internal predecessors, (2215), 79 states have call successors, (79), 5 states have call predecessors, (79), 151 states have return successors, (152), 77 states have call predecessors, (152), 77 states have call successors, (152) [2022-03-19 23:31:37,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 2446 transitions. [2022-03-19 23:31:37,558 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 2446 transitions. Word has length 69 [2022-03-19 23:31:37,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:37,558 INFO L478 AbstractCegarLoop]: Abstraction has 2244 states and 2446 transitions. [2022-03-19 23:31:37,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 2446 transitions. [2022-03-19 23:31:37,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:31:37,586 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:37,586 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:37,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:37,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-19 23:31:37,799 INFO L403 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash -192127699, now seen corresponding path program 161 times [2022-03-19 23:31:37,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:37,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695750407] [2022-03-19 23:31:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:37,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:37,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:37,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:38,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:31:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-19 23:31:38,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:38,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695750407] [2022-03-19 23:31:38,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695750407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:38,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144932377] [2022-03-19 23:31:38,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:31:38,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:38,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:38,377 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:38,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-19 23:31:38,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-19 23:31:38,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:31:38,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-19 23:31:39,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-19 23:31:39,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144932377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:39,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:39,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 57 [2022-03-19 23:31:39,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255871996] [2022-03-19 23:31:39,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:39,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:31:39,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:39,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:31:39,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3039, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:31:39,838 INFO L87 Difference]: Start difference. First operand 2244 states and 2446 transitions. Second operand has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:42,668 INFO L93 Difference]: Finished difference Result 2262 states and 2467 transitions. [2022-03-19 23:31:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 23:31:42,668 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-19 23:31:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:42,691 INFO L225 Difference]: With dead ends: 2262 [2022-03-19 23:31:42,691 INFO L226 Difference]: Without dead ends: 2256 [2022-03-19 23:31:42,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=365, Invalid=7645, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 23:31:42,720 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:42,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 233 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:31:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-19 23:31:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2254. [2022-03-19 23:31:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2020 states have (on average 1.100990099009901) internal successors, (2224), 2170 states have internal predecessors, (2224), 80 states have call successors, (80), 5 states have call predecessors, (80), 153 states have return successors, (155), 78 states have call predecessors, (155), 78 states have call successors, (155) [2022-03-19 23:31:44,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2459 transitions. [2022-03-19 23:31:44,239 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2459 transitions. Word has length 69 [2022-03-19 23:31:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:44,239 INFO L478 AbstractCegarLoop]: Abstraction has 2254 states and 2459 transitions. [2022-03-19 23:31:44,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:31:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2459 transitions. [2022-03-19 23:31:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 23:31:44,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:44,263 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:44,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:44,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:44,480 INFO L403 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:44,480 INFO L85 PathProgramCache]: Analyzing trace with hash -427401652, now seen corresponding path program 162 times [2022-03-19 23:31:44,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:44,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493100533] [2022-03-19 23:31:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:44,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:44,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:44,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:44,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:31:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:31:45,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:45,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493100533] [2022-03-19 23:31:45,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493100533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:45,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344297371] [2022-03-19 23:31:45,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:31:45,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:45,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:45,400 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:45,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-19 23:31:45,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 23:31:45,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:45,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 23:31:45,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:31:47,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:31:49,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344297371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:49,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:49,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 115 [2022-03-19 23:31:49,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903261496] [2022-03-19 23:31:49,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:49,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-19 23:31:49,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:49,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-19 23:31:49,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=12720, Unknown=0, NotChecked=0, Total=13110 [2022-03-19 23:31:49,999 INFO L87 Difference]: Start difference. First operand 2254 states and 2459 transitions. Second operand has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:03,946 INFO L93 Difference]: Finished difference Result 2462 states and 2700 transitions. [2022-03-19 23:32:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 23:32:03,947 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 70 [2022-03-19 23:32:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:04,020 INFO L225 Difference]: With dead ends: 2462 [2022-03-19 23:32:04,021 INFO L226 Difference]: Without dead ends: 2448 [2022-03-19 23:32:04,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5204 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1756, Invalid=33026, Unknown=0, NotChecked=0, Total=34782 [2022-03-19 23:32:04,055 INFO L913 BasicCegarLoop]: 194 mSDtfsCounter, 3819 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 19612 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3824 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 20012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 19612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:04,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3824 Valid, 551 Invalid, 20012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 19612 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-03-19 23:32:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2022-03-19 23:32:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2439. [2022-03-19 23:32:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2184 states have (on average 1.1007326007326008) internal successors, (2404), 2348 states have internal predecessors, (2404), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (176), 85 states have call predecessors, (176), 85 states have call successors, (176) [2022-03-19 23:32:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 2667 transitions. [2022-03-19 23:32:05,656 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 2667 transitions. Word has length 70 [2022-03-19 23:32:05,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:05,656 INFO L478 AbstractCegarLoop]: Abstraction has 2439 states and 2667 transitions. [2022-03-19 23:32:05,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:05,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 2667 transitions. [2022-03-19 23:32:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 23:32:05,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:05,682 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:05,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:05,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-03-19 23:32:05,900 INFO L403 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1235202671, now seen corresponding path program 163 times [2022-03-19 23:32:05,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:05,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410835001] [2022-03-19 23:32:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:05,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:05,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:05,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:32:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:06,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:32:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:32:06,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:06,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410835001] [2022-03-19 23:32:06,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410835001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:06,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157252483] [2022-03-19 23:32:06,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:32:06,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:06,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:06,731 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:32:06,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-19 23:32:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:06,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 23:32:06,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:32:08,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:32:11,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157252483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:11,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:11,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 115 [2022-03-19 23:32:11,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096061540] [2022-03-19 23:32:11,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:11,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-19 23:32:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-19 23:32:11,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=12720, Unknown=0, NotChecked=0, Total=13110 [2022-03-19 23:32:11,468 INFO L87 Difference]: Start difference. First operand 2439 states and 2667 transitions. Second operand has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:24,585 INFO L93 Difference]: Finished difference Result 2454 states and 2682 transitions. [2022-03-19 23:32:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 23:32:24,585 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 70 [2022-03-19 23:32:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:24,602 INFO L225 Difference]: With dead ends: 2454 [2022-03-19 23:32:24,602 INFO L226 Difference]: Without dead ends: 2442 [2022-03-19 23:32:24,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1756, Invalid=33026, Unknown=0, NotChecked=0, Total=34782 [2022-03-19 23:32:24,638 INFO L913 BasicCegarLoop]: 198 mSDtfsCounter, 3768 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 19315 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3803 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 19681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 19315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:24,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3803 Valid, 535 Invalid, 19681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 19315 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-03-19 23:32:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2022-03-19 23:32:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2022-03-19 23:32:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2185 states have (on average 1.1006864988558351) internal successors, (2405), 2349 states have internal predecessors, (2405), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (168), 85 states have call predecessors, (168), 85 states have call successors, (168) [2022-03-19 23:32:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 2660 transitions. [2022-03-19 23:32:26,374 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 2660 transitions. Word has length 70 [2022-03-19 23:32:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:26,374 INFO L478 AbstractCegarLoop]: Abstraction has 2440 states and 2660 transitions. [2022-03-19 23:32:26,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 2660 transitions. [2022-03-19 23:32:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 23:32:26,407 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:26,408 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:26,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:26,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:26,626 INFO L403 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:26,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:26,626 INFO L85 PathProgramCache]: Analyzing trace with hash -311854515, now seen corresponding path program 164 times [2022-03-19 23:32:26,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:26,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456243190] [2022-03-19 23:32:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:26,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:26,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:26,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:32:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:26,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:32:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:32:26,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:26,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456243190] [2022-03-19 23:32:26,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456243190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:26,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384797576] [2022-03-19 23:32:26,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:32:26,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:26,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:26,782 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:32:26,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-19 23:32:26,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:32:26,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:32:26,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 23:32:26,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:32:27,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:32:27,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384797576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:27,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:27,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-03-19 23:32:27,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011827849] [2022-03-19 23:32:27,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:27,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 23:32:27,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 23:32:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 23:32:27,245 INFO L87 Difference]: Start difference. First operand 2440 states and 2660 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:32:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:30,345 INFO L93 Difference]: Finished difference Result 2790 states and 3065 transitions. [2022-03-19 23:32:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-19 23:32:30,346 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 70 [2022-03-19 23:32:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:30,364 INFO L225 Difference]: With dead ends: 2790 [2022-03-19 23:32:30,364 INFO L226 Difference]: Without dead ends: 2712 [2022-03-19 23:32:30,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2242, Invalid=7264, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 23:32:30,408 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 214 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:30,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 91 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:32:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2022-03-19 23:32:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2658. [2022-03-19 23:32:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2403 states have (on average 1.0994590095713692) internal successors, (2642), 2567 states have internal predecessors, (2642), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (168), 85 states have call predecessors, (168), 85 states have call successors, (168) [2022-03-19 23:32:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 2897 transitions. [2022-03-19 23:32:32,297 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 2897 transitions. Word has length 70 [2022-03-19 23:32:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:32,297 INFO L478 AbstractCegarLoop]: Abstraction has 2658 states and 2897 transitions. [2022-03-19 23:32:32,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:32:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 2897 transitions. [2022-03-19 23:32:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 23:32:32,337 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:32,337 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:32,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:32,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:32,555 INFO L403 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:32,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:32,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1401146866, now seen corresponding path program 165 times [2022-03-19 23:32:32,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:32,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318766372] [2022-03-19 23:32:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:32,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:32,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:32,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:32:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:32,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:32:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:32:32,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:32,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318766372] [2022-03-19 23:32:32,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318766372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:32,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034228731] [2022-03-19 23:32:32,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:32:32,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:32,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:32,723 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:32:32,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-19 23:32:32,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-19 23:32:32,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:32:32,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 23:32:32,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:32:33,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:32:33,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034228731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:33,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:33,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-03-19 23:32:33,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344119817] [2022-03-19 23:32:33,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:33,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 23:32:33,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:33,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 23:32:33,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 23:32:33,178 INFO L87 Difference]: Start difference. First operand 2658 states and 2897 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:32:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:36,280 INFO L93 Difference]: Finished difference Result 4392 states and 4750 transitions. [2022-03-19 23:32:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-19 23:32:36,280 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2022-03-19 23:32:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:36,457 INFO L225 Difference]: With dead ends: 4392 [2022-03-19 23:32:36,458 INFO L226 Difference]: Without dead ends: 2930 [2022-03-19 23:32:36,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2242, Invalid=7264, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 23:32:36,638 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 323 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:36,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 106 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:32:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2022-03-19 23:32:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2876. [2022-03-19 23:32:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2621 states have (on average 1.098435711560473) internal successors, (2879), 2785 states have internal predecessors, (2879), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (168), 85 states have call predecessors, (168), 85 states have call successors, (168) [2022-03-19 23:32:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 3134 transitions. [2022-03-19 23:32:38,723 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 3134 transitions. Word has length 70 [2022-03-19 23:32:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:38,723 INFO L478 AbstractCegarLoop]: Abstraction has 2876 states and 3134 transitions. [2022-03-19 23:32:38,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:32:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 3134 transitions. [2022-03-19 23:32:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:32:38,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:38,895 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:38,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:39,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:39,111 INFO L403 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1382895286, now seen corresponding path program 166 times [2022-03-19 23:32:39,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:39,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135626375] [2022-03-19 23:32:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:39,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:39,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:39,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:32:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:39,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:32:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:32:40,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:40,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135626375] [2022-03-19 23:32:40,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135626375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:40,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587534070] [2022-03-19 23:32:40,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:32:40,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:40,222 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:32:40,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-19 23:32:40,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:32:40,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:32:40,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-19 23:32:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:32:40,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:32:41,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587534070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:41,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:41,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 59 [2022-03-19 23:32:41,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619205031] [2022-03-19 23:32:41,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:41,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 23:32:41,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:41,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 23:32:41,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3297, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:32:41,069 INFO L87 Difference]: Start difference. First operand 2876 states and 3134 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:32:47,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:47,633 INFO L93 Difference]: Finished difference Result 3108 states and 3389 transitions. [2022-03-19 23:32:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-19 23:32:47,634 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-19 23:32:47,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:47,665 INFO L225 Difference]: With dead ends: 3108 [2022-03-19 23:32:47,665 INFO L226 Difference]: Without dead ends: 3102 [2022-03-19 23:32:47,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=361, Invalid=11629, Unknown=0, NotChecked=0, Total=11990 [2022-03-19 23:32:47,709 INFO L913 BasicCegarLoop]: 201 mSDtfsCounter, 445 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 15857 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 15933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 15857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:47,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 458 Invalid, 15933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 15857 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-19 23:32:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2022-03-19 23:32:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 2892. [2022-03-19 23:32:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2634 states have (on average 1.0987091875474564) internal successors, (2894), 2800 states have internal predecessors, (2894), 88 states have call successors, (88), 5 states have call predecessors, (88), 169 states have return successors, (171), 86 states have call predecessors, (171), 86 states have call successors, (171) [2022-03-19 23:32:49,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 3153 transitions. [2022-03-19 23:32:49,918 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 3153 transitions. Word has length 71 [2022-03-19 23:32:49,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:49,919 INFO L478 AbstractCegarLoop]: Abstraction has 2892 states and 3153 transitions. [2022-03-19 23:32:49,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:32:49,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 3153 transitions. [2022-03-19 23:32:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:32:49,960 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:49,960 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:49,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-19 23:32:50,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:50,163 INFO L403 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:50,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:50,163 INFO L85 PathProgramCache]: Analyzing trace with hash -704284630, now seen corresponding path program 167 times [2022-03-19 23:32:50,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:50,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592017023] [2022-03-19 23:32:50,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:50,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:50,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:50,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:32:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:50,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:32:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:32:50,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:50,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592017023] [2022-03-19 23:32:50,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592017023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:50,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516806638] [2022-03-19 23:32:50,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:32:50,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:50,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:50,916 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:32:50,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-19 23:32:51,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-19 23:32:51,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:32:51,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-19 23:32:51,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:32:51,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 23:32:52,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516806638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:52,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:52,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 59 [2022-03-19 23:32:52,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078176825] [2022-03-19 23:32:52,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:52,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 23:32:52,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:52,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 23:32:52,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=3293, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:32:52,036 INFO L87 Difference]: Start difference. First operand 2892 states and 3153 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:32:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:57,851 INFO L93 Difference]: Finished difference Result 2898 states and 3158 transitions. [2022-03-19 23:32:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 23:32:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-19 23:32:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:57,869 INFO L225 Difference]: With dead ends: 2898 [2022-03-19 23:32:57,870 INFO L226 Difference]: Without dead ends: 2876 [2022-03-19 23:32:57,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=363, Invalid=11193, Unknown=0, NotChecked=0, Total=11556 [2022-03-19 23:32:57,911 INFO L913 BasicCegarLoop]: 181 mSDtfsCounter, 354 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 14329 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 14384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 14329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:57,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 438 Invalid, 14384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 14329 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-19 23:32:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2022-03-19 23:33:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2876. [2022-03-19 23:33:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2621 states have (on average 1.098435711560473) internal successors, (2879), 2785 states have internal predecessors, (2879), 87 states have call successors, (87), 5 states have call predecessors, (87), 167 states have return successors, (169), 85 states have call predecessors, (169), 85 states have call successors, (169) [2022-03-19 23:33:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 3135 transitions. [2022-03-19 23:33:00,036 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 3135 transitions. Word has length 71 [2022-03-19 23:33:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:00,036 INFO L478 AbstractCegarLoop]: Abstraction has 2876 states and 3135 transitions. [2022-03-19 23:33:00,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 3135 transitions. [2022-03-19 23:33:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:33:00,074 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:00,075 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:00,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-19 23:33:00,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-03-19 23:33:00,287 INFO L403 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:00,288 INFO L85 PathProgramCache]: Analyzing trace with hash 636513738, now seen corresponding path program 168 times [2022-03-19 23:33:00,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:00,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687216291] [2022-03-19 23:33:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:00,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:00,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:00,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:00,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:33:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:33:01,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:01,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687216291] [2022-03-19 23:33:01,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687216291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:01,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875154503] [2022-03-19 23:33:01,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:33:01,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:01,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:01,185 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:01,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-19 23:33:01,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 23:33:01,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:01,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-19 23:33:01,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:33:01,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:33:02,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875154503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:02,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:02,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 59 [2022-03-19 23:33:02,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574527573] [2022-03-19 23:33:02,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:02,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 23:33:02,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:02,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 23:33:02,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=3289, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:33:02,232 INFO L87 Difference]: Start difference. First operand 2876 states and 3135 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:07,660 INFO L93 Difference]: Finished difference Result 2882 states and 3140 transitions. [2022-03-19 23:33:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 23:33:07,660 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-19 23:33:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:07,680 INFO L225 Difference]: With dead ends: 2882 [2022-03-19 23:33:07,680 INFO L226 Difference]: Without dead ends: 2858 [2022-03-19 23:33:07,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 128 SyntacticMatches, 9 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=365, Invalid=10765, Unknown=0, NotChecked=0, Total=11130 [2022-03-19 23:33:07,723 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 315 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 11815 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 11869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 11815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:07,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 398 Invalid, 11869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 11815 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 23:33:07,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2022-03-19 23:33:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2858. [2022-03-19 23:33:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2606 states have (on average 1.0982348426707598) internal successors, (2862), 2768 states have internal predecessors, (2862), 86 states have call successors, (86), 5 states have call predecessors, (86), 165 states have return successors, (167), 84 states have call predecessors, (167), 84 states have call successors, (167) [2022-03-19 23:33:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 3115 transitions. [2022-03-19 23:33:09,841 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 3115 transitions. Word has length 71 [2022-03-19 23:33:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:09,841 INFO L478 AbstractCegarLoop]: Abstraction has 2858 states and 3115 transitions. [2022-03-19 23:33:09,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 3115 transitions. [2022-03-19 23:33:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:33:09,879 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:09,879 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:09,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-03-19 23:33:10,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:10,097 INFO L403 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:10,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1660863574, now seen corresponding path program 169 times [2022-03-19 23:33:10,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:10,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409328764] [2022-03-19 23:33:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:10,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:10,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:10,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:10,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:33:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:33:10,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409328764] [2022-03-19 23:33:10,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409328764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569604374] [2022-03-19 23:33:10,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:33:10,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:10,855 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:10,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-19 23:33:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:11,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 23:33:11,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:33:11,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 23:33:12,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569604374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:12,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:12,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 59 [2022-03-19 23:33:12,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490307692] [2022-03-19 23:33:12,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:12,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 23:33:12,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 23:33:12,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3285, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:33:12,027 INFO L87 Difference]: Start difference. First operand 2858 states and 3115 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:17,517 INFO L93 Difference]: Finished difference Result 2864 states and 3120 transitions. [2022-03-19 23:33:17,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 23:33:17,517 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-19 23:33:17,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:17,536 INFO L225 Difference]: With dead ends: 2864 [2022-03-19 23:33:17,536 INFO L226 Difference]: Without dead ends: 2838 [2022-03-19 23:33:17,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 126 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=367, Invalid=10345, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 23:33:17,579 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 276 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 10190 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 10242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 10190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:17,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 373 Invalid, 10242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 10190 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 23:33:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2022-03-19 23:33:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2838. [2022-03-19 23:33:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2589 states have (on average 1.0981073773657783) internal successors, (2843), 2749 states have internal predecessors, (2843), 85 states have call successors, (85), 5 states have call predecessors, (85), 163 states have return successors, (165), 83 states have call predecessors, (165), 83 states have call successors, (165) [2022-03-19 23:33:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 3093 transitions. [2022-03-19 23:33:19,574 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 3093 transitions. Word has length 71 [2022-03-19 23:33:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:19,574 INFO L478 AbstractCegarLoop]: Abstraction has 2838 states and 3093 transitions. [2022-03-19 23:33:19,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 3093 transitions. [2022-03-19 23:33:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:33:19,612 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:19,612 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:19,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-19 23:33:19,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-03-19 23:33:19,830 INFO L403 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:19,830 INFO L85 PathProgramCache]: Analyzing trace with hash 382544458, now seen corresponding path program 170 times [2022-03-19 23:33:19,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:19,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289024448] [2022-03-19 23:33:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:19,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:19,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:20,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:33:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:33:20,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:20,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289024448] [2022-03-19 23:33:20,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289024448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:20,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465670666] [2022-03-19 23:33:20,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:33:20,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:20,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:20,488 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:20,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-19 23:33:20,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:33:20,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:20,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 23:33:20,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:33:21,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 23:33:21,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465670666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:21,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:21,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 59 [2022-03-19 23:33:21,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695352194] [2022-03-19 23:33:21,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:21,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 23:33:21,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:21,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 23:33:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3281, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:33:21,465 INFO L87 Difference]: Start difference. First operand 2838 states and 3093 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:25,989 INFO L93 Difference]: Finished difference Result 2844 states and 3098 transitions. [2022-03-19 23:33:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 23:33:25,989 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-19 23:33:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:26,007 INFO L225 Difference]: With dead ends: 2844 [2022-03-19 23:33:26,007 INFO L226 Difference]: Without dead ends: 2816 [2022-03-19 23:33:26,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=369, Invalid=9933, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 23:33:26,049 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 237 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 8825 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 8875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 8825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:26,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 353 Invalid, 8875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 8825 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 23:33:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2022-03-19 23:33:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2816. [2022-03-19 23:33:28,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2570 states have (on average 1.0980544747081713) internal successors, (2822), 2728 states have internal predecessors, (2822), 84 states have call successors, (84), 5 states have call predecessors, (84), 161 states have return successors, (163), 82 states have call predecessors, (163), 82 states have call successors, (163) [2022-03-19 23:33:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 3069 transitions. [2022-03-19 23:33:28,143 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 3069 transitions. Word has length 71 [2022-03-19 23:33:28,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:28,143 INFO L478 AbstractCegarLoop]: Abstraction has 2816 states and 3069 transitions. [2022-03-19 23:33:28,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:28,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 3069 transitions. [2022-03-19 23:33:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:33:28,180 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:28,180 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:28,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-19 23:33:28,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-19 23:33:28,384 INFO L403 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1528430378, now seen corresponding path program 171 times [2022-03-19 23:33:28,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:28,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702872979] [2022-03-19 23:33:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:28,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:28,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:28,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:28,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:33:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:33:29,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:29,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702872979] [2022-03-19 23:33:29,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702872979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:29,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340725611] [2022-03-19 23:33:29,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:33:29,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:29,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:29,159 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:29,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-19 23:33:29,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 23:33:29,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:29,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 23:33:29,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:33:30,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-19 23:33:30,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340725611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:30,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:30,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 59 [2022-03-19 23:33:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957229784] [2022-03-19 23:33:30,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:30,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 23:33:30,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:30,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 23:33:30,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3277, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:33:30,535 INFO L87 Difference]: Start difference. First operand 2816 states and 3069 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:35,199 INFO L93 Difference]: Finished difference Result 2822 states and 3074 transitions. [2022-03-19 23:33:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 23:33:35,199 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-19 23:33:35,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:35,217 INFO L225 Difference]: With dead ends: 2822 [2022-03-19 23:33:35,217 INFO L226 Difference]: Without dead ends: 2792 [2022-03-19 23:33:35,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=371, Invalid=9529, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 23:33:35,286 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 198 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 7625 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 7673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 7625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:35,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 338 Invalid, 7673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 7625 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 23:33:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2022-03-19 23:33:37,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2792. [2022-03-19 23:33:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2549 states have (on average 1.0980776775205963) internal successors, (2799), 2705 states have internal predecessors, (2799), 83 states have call successors, (83), 5 states have call predecessors, (83), 159 states have return successors, (161), 81 states have call predecessors, (161), 81 states have call successors, (161) [2022-03-19 23:33:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 3043 transitions. [2022-03-19 23:33:37,266 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 3043 transitions. Word has length 71 [2022-03-19 23:33:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:37,266 INFO L478 AbstractCegarLoop]: Abstraction has 2792 states and 3043 transitions. [2022-03-19 23:33:37,266 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 3043 transitions. [2022-03-19 23:33:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:33:37,303 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:37,303 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:37,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-19 23:33:37,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2022-03-19 23:33:37,519 INFO L403 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:37,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1393498422, now seen corresponding path program 172 times [2022-03-19 23:33:37,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:37,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209990602] [2022-03-19 23:33:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:37,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:37,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:37,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:37,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:33:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:33:37,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:37,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209990602] [2022-03-19 23:33:37,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209990602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:37,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601769390] [2022-03-19 23:33:37,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:33:37,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:37,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:37,979 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:37,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-19 23:33:38,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:33:38,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 23:33:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:33:38,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 23:33:38,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601769390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:38,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:38,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 59 [2022-03-19 23:33:38,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855120883] [2022-03-19 23:33:38,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:38,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 23:33:38,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:38,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 23:33:38,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3273, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:33:38,942 INFO L87 Difference]: Start difference. First operand 2792 states and 3043 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:42,733 INFO L93 Difference]: Finished difference Result 2798 states and 3048 transitions. [2022-03-19 23:33:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 23:33:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-19 23:33:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:42,751 INFO L225 Difference]: With dead ends: 2798 [2022-03-19 23:33:42,751 INFO L226 Difference]: Without dead ends: 2766 [2022-03-19 23:33:42,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=9133, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 23:33:42,791 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 158 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 5470 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 5516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:42,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 288 Invalid, 5516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5470 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 23:33:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-03-19 23:33:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2766. [2022-03-19 23:33:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2526 states have (on average 1.098178939034046) internal successors, (2774), 2680 states have internal predecessors, (2774), 82 states have call successors, (82), 5 states have call predecessors, (82), 157 states have return successors, (159), 80 states have call predecessors, (159), 80 states have call successors, (159) [2022-03-19 23:33:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3015 transitions. [2022-03-19 23:33:44,776 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3015 transitions. Word has length 71 [2022-03-19 23:33:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:44,776 INFO L478 AbstractCegarLoop]: Abstraction has 2766 states and 3015 transitions. [2022-03-19 23:33:44,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3015 transitions. [2022-03-19 23:33:44,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:33:44,911 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:44,911 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:44,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-03-19 23:33:45,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:45,129 INFO L403 AbstractCegarLoop]: === Iteration 183 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash 998752938, now seen corresponding path program 173 times [2022-03-19 23:33:45,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:45,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775472855] [2022-03-19 23:33:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:45,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:45,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:45,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:45,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:33:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:33:45,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:45,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775472855] [2022-03-19 23:33:45,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775472855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:45,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428157925] [2022-03-19 23:33:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:33:45,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:45,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:45,814 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:45,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-19 23:33:45,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:33:45,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:45,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 23:33:45,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:33:46,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 23:33:47,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428157925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:47,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:47,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 59 [2022-03-19 23:33:47,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531503510] [2022-03-19 23:33:47,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:47,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 23:33:47,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:47,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 23:33:47,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3269, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:33:47,337 INFO L87 Difference]: Start difference. First operand 2766 states and 3015 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:51,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:51,395 INFO L93 Difference]: Finished difference Result 2772 states and 3020 transitions. [2022-03-19 23:33:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 23:33:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-19 23:33:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:51,413 INFO L225 Difference]: With dead ends: 2772 [2022-03-19 23:33:51,413 INFO L226 Difference]: Without dead ends: 2738 [2022-03-19 23:33:51,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=375, Invalid=8745, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 23:33:51,454 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 121 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 4798 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 4844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:51,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 300 Invalid, 4844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4798 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 23:33:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2022-03-19 23:33:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2738. [2022-03-19 23:33:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2501 states have (on average 1.098360655737705) internal successors, (2747), 2653 states have internal predecessors, (2747), 81 states have call successors, (81), 5 states have call predecessors, (81), 155 states have return successors, (157), 79 states have call predecessors, (157), 79 states have call successors, (157) [2022-03-19 23:33:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 2985 transitions. [2022-03-19 23:33:53,492 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 2985 transitions. Word has length 71 [2022-03-19 23:33:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:53,492 INFO L478 AbstractCegarLoop]: Abstraction has 2738 states and 2985 transitions. [2022-03-19 23:33:53,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:33:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 2985 transitions. [2022-03-19 23:33:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:33:53,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:53,529 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:53,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-19 23:33:53,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:53,748 INFO L403 AbstractCegarLoop]: === Iteration 184 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:53,748 INFO L85 PathProgramCache]: Analyzing trace with hash -529301121, now seen corresponding path program 174 times [2022-03-19 23:33:53,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:53,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294204278] [2022-03-19 23:33:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:53,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:53,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:53,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:53,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:33:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-19 23:33:54,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294204278] [2022-03-19 23:33:54,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294204278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764902671] [2022-03-19 23:33:54,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:33:54,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:54,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:54,141 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:54,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-19 23:33:54,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 23:33:54,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:33:54,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 23:33:55,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 23:33:56,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764902671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:56,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:56,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 69 [2022-03-19 23:33:56,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900137996] [2022-03-19 23:33:56,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:56,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-19 23:33:56,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:56,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-19 23:33:56,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=4443, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 23:33:56,120 INFO L87 Difference]: Start difference. First operand 2738 states and 2985 transitions. Second operand has 69 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 68 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:01,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:34:01,655 INFO L93 Difference]: Finished difference Result 2890 states and 3171 transitions. [2022-03-19 23:34:01,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 23:34:01,656 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 68 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-03-19 23:34:01,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:34:01,848 INFO L225 Difference]: With dead ends: 2890 [2022-03-19 23:34:01,848 INFO L226 Difference]: Without dead ends: 2868 [2022-03-19 23:34:01,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=780, Invalid=10992, Unknown=0, NotChecked=0, Total=11772 [2022-03-19 23:34:01,932 INFO L913 BasicCegarLoop]: 131 mSDtfsCounter, 1698 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 6569 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 6723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 6569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:34:01,932 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1702 Valid, 298 Invalid, 6723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 6569 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 23:34:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2022-03-19 23:34:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2863. [2022-03-19 23:34:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2575 states have (on average 1.0951456310679613) internal successors, (2820), 2761 states have internal predecessors, (2820), 98 states have call successors, (98), 5 states have call predecessors, (98), 189 states have return successors, (208), 96 states have call predecessors, (208), 96 states have call successors, (208) [2022-03-19 23:34:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 3126 transitions. [2022-03-19 23:34:03,968 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 3126 transitions. Word has length 71 [2022-03-19 23:34:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:34:03,968 INFO L478 AbstractCegarLoop]: Abstraction has 2863 states and 3126 transitions. [2022-03-19 23:34:03,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 68 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 3126 transitions. [2022-03-19 23:34:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:34:04,010 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:34:04,010 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:34:04,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-03-19 23:34:04,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-03-19 23:34:04,227 INFO L403 AbstractCegarLoop]: === Iteration 185 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:34:04,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:34:04,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2061262006, now seen corresponding path program 175 times [2022-03-19 23:34:04,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:34:04,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755498314] [2022-03-19 23:34:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:34:04,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:34:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:04,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:34:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:04,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:34:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:04,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:34:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-19 23:34:04,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:34:04,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755498314] [2022-03-19 23:34:04,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755498314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:34:04,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026470603] [2022-03-19 23:34:04,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:34:04,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:04,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:34:04,843 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:34:04,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-19 23:34:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:05,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:34:05,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:34:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-19 23:34:06,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:34:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-19 23:34:06,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026470603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:34:06,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:34:06,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 59 [2022-03-19 23:34:06,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117770970] [2022-03-19 23:34:06,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:34:06,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 23:34:06,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:34:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 23:34:06,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3265, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 23:34:06,361 INFO L87 Difference]: Start difference. First operand 2863 states and 3126 transitions. Second operand has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:34:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:34:09,929 INFO L93 Difference]: Finished difference Result 2881 states and 3148 transitions. [2022-03-19 23:34:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 23:34:09,930 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-03-19 23:34:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:34:09,958 INFO L225 Difference]: With dead ends: 2881 [2022-03-19 23:34:09,959 INFO L226 Difference]: Without dead ends: 2859 [2022-03-19 23:34:10,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=377, Invalid=8365, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 23:34:10,161 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 3304 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 3348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:34:10,161 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 263 Invalid, 3348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3304 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 23:34:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2022-03-19 23:34:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2854. [2022-03-19 23:34:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2854 states, 2566 states have (on average 1.0958690568978955) internal successors, (2812), 2752 states have internal predecessors, (2812), 98 states have call successors, (98), 5 states have call predecessors, (98), 189 states have return successors, (208), 96 states have call predecessors, (208), 96 states have call successors, (208) [2022-03-19 23:34:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 3118 transitions. [2022-03-19 23:34:12,279 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 3118 transitions. Word has length 71 [2022-03-19 23:34:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:34:12,279 INFO L478 AbstractCegarLoop]: Abstraction has 2854 states and 3118 transitions. [2022-03-19 23:34:12,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 53 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:34:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 3118 transitions. [2022-03-19 23:34:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:34:12,314 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:34:12,314 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:34:12,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-19 23:34:12,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:12,531 INFO L403 AbstractCegarLoop]: === Iteration 186 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:34:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:34:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1706921413, now seen corresponding path program 176 times [2022-03-19 23:34:12,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:34:12,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411029300] [2022-03-19 23:34:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:34:12,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:34:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:12,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:34:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:12,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:34:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:12,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 23:34:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-19 23:34:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:34:12,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411029300] [2022-03-19 23:34:12,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411029300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:34:12,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438002386] [2022-03-19 23:34:12,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:34:12,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:12,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:34:12,920 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:34:12,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-19 23:34:13,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:34:13,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:34:13,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:34:13,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:34:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 23:34:13,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:34:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 23:34:15,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438002386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:34:15,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:34:15,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 69 [2022-03-19 23:34:15,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167047890] [2022-03-19 23:34:15,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:34:15,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-19 23:34:15,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:34:15,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-19 23:34:15,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=4443, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 23:34:15,014 INFO L87 Difference]: Start difference. First operand 2854 states and 3118 transitions. Second operand has 69 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 68 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:34:21,128 INFO L93 Difference]: Finished difference Result 2868 states and 3131 transitions. [2022-03-19 23:34:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 23:34:21,128 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 68 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-03-19 23:34:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:34:21,147 INFO L225 Difference]: With dead ends: 2868 [2022-03-19 23:34:21,147 INFO L226 Difference]: Without dead ends: 2834 [2022-03-19 23:34:21,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=780, Invalid=10992, Unknown=0, NotChecked=0, Total=11772 [2022-03-19 23:34:21,206 INFO L913 BasicCegarLoop]: 127 mSDtfsCounter, 1522 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7523 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 7649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 7523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:34:21,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 339 Invalid, 7649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 7523 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 23:34:21,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-03-19 23:34:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2832. [2022-03-19 23:34:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2544 states have (on average 1.0959119496855345) internal successors, (2788), 2730 states have internal predecessors, (2788), 98 states have call successors, (98), 5 states have call predecessors, (98), 189 states have return successors, (192), 96 states have call predecessors, (192), 96 states have call successors, (192) [2022-03-19 23:34:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3078 transitions. [2022-03-19 23:34:23,314 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3078 transitions. Word has length 71 [2022-03-19 23:34:23,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:34:23,314 INFO L478 AbstractCegarLoop]: Abstraction has 2832 states and 3078 transitions. [2022-03-19 23:34:23,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 68 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3078 transitions. [2022-03-19 23:34:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-19 23:34:23,349 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:34:23,349 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:34:23,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-03-19 23:34:23,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:23,562 INFO L403 AbstractCegarLoop]: === Iteration 187 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:34:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:34:23,563 INFO L85 PathProgramCache]: Analyzing trace with hash -939553329, now seen corresponding path program 177 times [2022-03-19 23:34:23,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:34:23,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716131740] [2022-03-19 23:34:23,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:34:23,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:34:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:23,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:34:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:23,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:34:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:23,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 23:34:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:34:24,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:34:24,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716131740] [2022-03-19 23:34:24,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716131740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:34:24,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352366045] [2022-03-19 23:34:24,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:34:24,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:24,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:34:24,404 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:34:24,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-19 23:34:24,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-19 23:34:24,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:34:24,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 23:34:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates...