/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/array-examples/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 20:15:52,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 20:15:52,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 20:15:52,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 20:15:52,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-30 20:15:52,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-30 20:15:52,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-30 20:15:52,387 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 [2022-01-30 20:15:52,404 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 20:15:52,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 20:15:52,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 20:15:52,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 20:15:52,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 20:15:52,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 20:15:52,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 20:15:52,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 20:15:52,405 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 20:15:52,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 20:15:52,406 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 20:15:52,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 20:15:52,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 20:15:52,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 20:15:52,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 20:15:52,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 20:15:52,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 20:15:52,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 20:15:52,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 20:15:52,406 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 20:15:52,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 20:15:52,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 20:15:52,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 20:15:52,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 20:15:52,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 20:15:52,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 20:15:52,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 20:15:52,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 20:15:52,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 20:15:52,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 20:15:52,407 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 20:15:52,408 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 20:15:52,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 20:15:52,408 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 20:15:52,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 20:15:52,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 20:15:52,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 20:15:52,619 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 20:15:52,621 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 20:15:52,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2022-01-30 20:15:52,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3dccd00/aec5350dc4cf45ada716ba515cb77f9b/FLAG638664aa0 [2022-01-30 20:15:52,990 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 20:15:52,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2022-01-30 20:15:52,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3dccd00/aec5350dc4cf45ada716ba515cb77f9b/FLAG638664aa0 [2022-01-30 20:15:53,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3dccd00/aec5350dc4cf45ada716ba515cb77f9b [2022-01-30 20:15:53,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 20:15:53,405 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 20:15:53,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 20:15:53,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 20:15:53,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 20:15:53,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26557883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53, skipping insertion in model container [2022-01-30 20:15:53,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 20:15:53,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 20:15:53,541 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i[820,833] [2022-01-30 20:15:53,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 20:15:53,575 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 20:15:53,585 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i[820,833] [2022-01-30 20:15:53,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 20:15:53,615 INFO L208 MainTranslator]: Completed translation [2022-01-30 20:15:53,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53 WrapperNode [2022-01-30 20:15:53,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 20:15:53,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 20:15:53,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 20:15:53,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 20:15:53,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 20:15:53,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 20:15:53,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 20:15:53,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 20:15:53,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 20:15:53,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:53,689 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) [2022-01-30 20:15:53,708 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 [2022-01-30 20:15:53,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 20:15:53,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 20:15:53,719 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 20:15:53,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 20:15:53,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 20:15:53,720 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 20:15:53,720 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 20:15:53,720 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 20:15:53,720 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 20:15:53,720 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 20:15:53,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 20:15:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 20:15:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 20:15:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 20:15:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 20:15:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 20:15:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 20:15:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 20:15:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 20:15:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 20:15:53,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 20:15:53,806 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 20:15:53,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 20:15:53,971 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 20:15:53,977 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 20:15:53,977 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-30 20:15:53,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 08:15:53 BoogieIcfgContainer [2022-01-30 20:15:53,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 20:15:53,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 20:15:53,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 20:15:53,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 20:15:53,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 08:15:53" (1/3) ... [2022-01-30 20:15:53,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f43cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 08:15:53, skipping insertion in model container [2022-01-30 20:15:53,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (2/3) ... [2022-01-30 20:15:53,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f43cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 08:15:53, skipping insertion in model container [2022-01-30 20:15:53,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 08:15:53" (3/3) ... [2022-01-30 20:15:53,985 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2022-01-30 20:15:53,989 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 20:15:53,990 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 20:15:54,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 20:15:54,041 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 20:15:54,041 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 20:15:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 20:15:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 20:15:54,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:54,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:54,067 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash 498599300, now seen corresponding path program 1 times [2022-01-30 20:15:54,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:54,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612417235] [2022-01-30 20:15:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:54,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:54,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612417235] [2022-01-30 20:15:54,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612417235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:54,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:54,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 20:15:54,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745263940] [2022-01-30 20:15:54,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:54,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 20:15:54,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 20:15:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 20:15:54,280 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-01-30 20:15:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:54,323 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2022-01-30 20:15:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 20:15:54,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2022-01-30 20:15:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:54,331 INFO L225 Difference]: With dead ends: 54 [2022-01-30 20:15:54,331 INFO L226 Difference]: Without dead ends: 26 [2022-01-30 20:15:54,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 20:15:54,335 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:54,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 20:15:54,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-30 20:15:54,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-30 20:15:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 20:15:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-01-30 20:15:54,364 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2022-01-30 20:15:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:54,365 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-01-30 20:15:54,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-01-30 20:15:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-01-30 20:15:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 20:15:54,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:54,366 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:54,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 20:15:54,367 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:54,371 INFO L85 PathProgramCache]: Analyzing trace with hash 247748289, now seen corresponding path program 1 times [2022-01-30 20:15:54,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:54,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645739387] [2022-01-30 20:15:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:54,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:54,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645739387] [2022-01-30 20:15:54,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645739387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:54,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:54,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 20:15:54,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042852049] [2022-01-30 20:15:54,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:54,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 20:15:54,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:54,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 20:15:54,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 20:15:54,425 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-01-30 20:15:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:54,496 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-01-30 20:15:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 20:15:54,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2022-01-30 20:15:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:54,497 INFO L225 Difference]: With dead ends: 46 [2022-01-30 20:15:54,498 INFO L226 Difference]: Without dead ends: 28 [2022-01-30 20:15:54,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-30 20:15:54,499 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:54,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-30 20:15:54,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-30 20:15:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 20:15:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-30 20:15:54,505 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2022-01-30 20:15:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:54,505 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-30 20:15:54,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-01-30 20:15:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-30 20:15:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-30 20:15:54,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:54,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:54,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 20:15:54,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:54,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1572069859, now seen corresponding path program 1 times [2022-01-30 20:15:54,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:54,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998023668] [2022-01-30 20:15:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:54,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:54,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998023668] [2022-01-30 20:15:54,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998023668] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:54,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679532577] [2022-01-30 20:15:54,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:54,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:54,548 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) [2022-01-30 20:15:54,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 20:15:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 20:15:54,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 20:15:54,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 20:15:54,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679532577] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:54,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 20:15:54,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 20:15:54,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406195120] [2022-01-30 20:15:54,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:54,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 20:15:54,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:54,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 20:15:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 20:15:54,671 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:54,697 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-01-30 20:15:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 20:15:54,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-30 20:15:54,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:54,699 INFO L225 Difference]: With dead ends: 44 [2022-01-30 20:15:54,699 INFO L226 Difference]: Without dead ends: 31 [2022-01-30 20:15:54,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 20:15:54,702 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:54,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 61 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 20:15:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-30 20:15:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-30 20:15:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 20:15:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-01-30 20:15:54,712 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2022-01-30 20:15:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:54,712 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-01-30 20:15:54,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-01-30 20:15:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 20:15:54,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:54,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:54,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 20:15:54,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:54,931 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:54,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1883512810, now seen corresponding path program 1 times [2022-01-30 20:15:54,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:54,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143015370] [2022-01-30 20:15:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 20:15:54,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:54,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143015370] [2022-01-30 20:15:54,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143015370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:54,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129222490] [2022-01-30 20:15:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:54,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:54,998 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) [2022-01-30 20:15:54,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 20:15:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 20:15:55,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 20:15:55,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 20:15:55,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129222490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:55,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 20:15:55,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 20:15:55,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069178336] [2022-01-30 20:15:55,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:55,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 20:15:55,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 20:15:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 20:15:55,104 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:55,117 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-01-30 20:15:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 20:15:55,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-30 20:15:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:55,118 INFO L225 Difference]: With dead ends: 56 [2022-01-30 20:15:55,118 INFO L226 Difference]: Without dead ends: 35 [2022-01-30 20:15:55,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 20:15:55,119 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:55,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 20:15:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-30 20:15:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-01-30 20:15:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 20:15:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-01-30 20:15:55,129 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2022-01-30 20:15:55,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:55,130 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-01-30 20:15:55,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-01-30 20:15:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-30 20:15:55,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:55,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:55,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 20:15:55,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-30 20:15:55,343 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:55,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:55,344 INFO L85 PathProgramCache]: Analyzing trace with hash -45337753, now seen corresponding path program 1 times [2022-01-30 20:15:55,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:55,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629164820] [2022-01-30 20:15:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:55,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 20:15:55,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:55,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629164820] [2022-01-30 20:15:55,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629164820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:55,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676154754] [2022-01-30 20:15:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:55,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:55,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:55,382 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) [2022-01-30 20:15:55,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 20:15:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 20:15:55,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 20:15:55,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 20:15:55,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676154754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:55,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:55,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 20:15:55,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29232247] [2022-01-30 20:15:55,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:55,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 20:15:55,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:55,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 20:15:55,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 20:15:55,565 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:55,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:55,666 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2022-01-30 20:15:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 20:15:55,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-30 20:15:55,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:55,667 INFO L225 Difference]: With dead ends: 61 [2022-01-30 20:15:55,667 INFO L226 Difference]: Without dead ends: 38 [2022-01-30 20:15:55,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 20:15:55,668 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:55,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 35 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-30 20:15:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-30 20:15:55,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 20:15:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-01-30 20:15:55,677 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2022-01-30 20:15:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:55,677 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-01-30 20:15:55,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-01-30 20:15:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-30 20:15:55,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:55,678 INFO L514 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] [2022-01-30 20:15:55,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 20:15:55,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:55,890 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:55,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:55,890 INFO L85 PathProgramCache]: Analyzing trace with hash 317957313, now seen corresponding path program 2 times [2022-01-30 20:15:55,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:55,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324027586] [2022-01-30 20:15:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:55,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-30 20:15:55,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:55,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324027586] [2022-01-30 20:15:55,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324027586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308153565] [2022-01-30 20:15:55,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 20:15:55,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:55,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:55,982 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) [2022-01-30 20:15:55,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 20:15:56,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 20:15:56,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:15:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 20:15:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 20:15:56,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 20:15:56,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308153565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:56,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:56,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-30 20:15:56,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94861737] [2022-01-30 20:15:56,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:56,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-30 20:15:56,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-30 20:15:56,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-30 20:15:56,235 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:56,436 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2022-01-30 20:15:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-30 20:15:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-30 20:15:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:56,446 INFO L225 Difference]: With dead ends: 82 [2022-01-30 20:15:56,446 INFO L226 Difference]: Without dead ends: 59 [2022-01-30 20:15:56,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-30 20:15:56,448 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:56,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 47 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-30 20:15:56,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-01-30 20:15:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 20:15:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-01-30 20:15:56,454 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 29 [2022-01-30 20:15:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:56,454 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-01-30 20:15:56,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-01-30 20:15:56,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-30 20:15:56,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:56,456 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:56,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-30 20:15:56,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:56,673 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:56,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:56,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1061801596, now seen corresponding path program 3 times [2022-01-30 20:15:56,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:56,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957157550] [2022-01-30 20:15:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:56,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:56,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-30 20:15:56,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:56,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957157550] [2022-01-30 20:15:56,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957157550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:56,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406168784] [2022-01-30 20:15:56,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 20:15:56,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:56,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:56,761 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) [2022-01-30 20:15:56,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 20:15:56,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-30 20:15:56,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:15:56,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 20:15:56,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-30 20:15:56,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-30 20:15:56,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406168784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:56,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:56,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-30 20:15:56,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865976215] [2022-01-30 20:15:56,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:56,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-30 20:15:56,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:56,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-30 20:15:56,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-30 20:15:56,950 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:57,061 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2022-01-30 20:15:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-30 20:15:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-30 20:15:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:57,063 INFO L225 Difference]: With dead ends: 106 [2022-01-30 20:15:57,063 INFO L226 Difference]: Without dead ends: 79 [2022-01-30 20:15:57,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-01-30 20:15:57,066 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:57,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 44 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-30 20:15:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-01-30 20:15:57,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 20:15:57,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-01-30 20:15:57,073 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 44 [2022-01-30 20:15:57,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:57,073 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-01-30 20:15:57,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:57,073 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-01-30 20:15:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-30 20:15:57,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:57,074 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:57,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-30 20:15:57,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:57,290 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:57,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:57,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1776075068, now seen corresponding path program 4 times [2022-01-30 20:15:57,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:57,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126135798] [2022-01-30 20:15:57,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:57,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:57,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-30 20:15:57,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:57,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126135798] [2022-01-30 20:15:57,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126135798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:57,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793283595] [2022-01-30 20:15:57,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 20:15:57,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:57,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:57,416 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) [2022-01-30 20:15:57,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 20:15:57,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 20:15:57,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:15:57,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 20:15:57,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-30 20:15:57,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-30 20:15:57,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793283595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:57,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:57,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-30 20:15:57,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012059649] [2022-01-30 20:15:57,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:57,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 20:15:57,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:57,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 20:15:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-30 20:15:57,766 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:58,095 INFO L93 Difference]: Finished difference Result 155 states and 198 transitions. [2022-01-30 20:15:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 20:15:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-30 20:15:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:58,099 INFO L225 Difference]: With dead ends: 155 [2022-01-30 20:15:58,099 INFO L226 Difference]: Without dead ends: 103 [2022-01-30 20:15:58,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-30 20:15:58,101 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:58,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 50 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-30 20:15:58,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-01-30 20:15:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 20:15:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2022-01-30 20:15:58,108 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 56 [2022-01-30 20:15:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:58,108 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2022-01-30 20:15:58,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2022-01-30 20:15:58,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-30 20:15:58,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:58,110 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:58,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 20:15:58,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:58,329 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1286319572, now seen corresponding path program 5 times [2022-01-30 20:15:58,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:58,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680682281] [2022-01-30 20:15:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:58,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-30 20:15:58,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:58,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680682281] [2022-01-30 20:15:58,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680682281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:58,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170933479] [2022-01-30 20:15:58,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 20:15:58,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:58,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:58,618 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) [2022-01-30 20:15:58,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 20:15:58,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-01-30 20:15:58,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:15:58,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 20:15:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-30 20:15:59,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-30 20:15:59,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170933479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:59,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:59,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2022-01-30 20:15:59,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474222940] [2022-01-30 20:15:59,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:59,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-30 20:15:59,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-30 20:15:59,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2022-01-30 20:15:59,274 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:59,968 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2022-01-30 20:15:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-30 20:15:59,968 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-30 20:15:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:59,969 INFO L225 Difference]: With dead ends: 206 [2022-01-30 20:15:59,969 INFO L226 Difference]: Without dead ends: 154 [2022-01-30 20:15:59,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1257, Invalid=4595, Unknown=0, NotChecked=0, Total=5852 [2022-01-30 20:15:59,972 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 161 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:59,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 67 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 20:15:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-30 20:15:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-01-30 20:15:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.2244897959183674) internal successors, (180), 147 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 20:15:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 185 transitions. [2022-01-30 20:15:59,981 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 185 transitions. Word has length 80 [2022-01-30 20:15:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:59,993 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 185 transitions. [2022-01-30 20:15:59,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:15:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 185 transitions. [2022-01-30 20:15:59,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-30 20:15:59,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:59,995 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:16:00,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 20:16:00,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:00,196 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:00,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:00,196 INFO L85 PathProgramCache]: Analyzing trace with hash 718774390, now seen corresponding path program 6 times [2022-01-30 20:16:00,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:00,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67692195] [2022-01-30 20:16:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:00,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:00,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-01-30 20:16:00,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:00,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67692195] [2022-01-30 20:16:00,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67692195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:00,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487241768] [2022-01-30 20:16:00,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 20:16:00,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:00,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:00,517 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) [2022-01-30 20:16:00,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 20:16:00,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-30 20:16:00,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:16:00,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 20:16:00,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:00,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 20:16:00,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-01-30 20:16:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-01-30 20:16:01,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:01,309 INFO L353 Elim1Store]: treesize reduction 56, result has 31.7 percent of original size [2022-01-30 20:16:01,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 32 [2022-01-30 20:16:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-01-30 20:16:01,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487241768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:01,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:01,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 11, 10] total 41 [2022-01-30 20:16:01,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745201220] [2022-01-30 20:16:01,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:01,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-30 20:16:01,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:01,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-30 20:16:01,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1265, Unknown=0, NotChecked=0, Total=1640 [2022-01-30 20:16:01,421 INFO L87 Difference]: Start difference. First operand 153 states and 185 transitions. Second operand has 41 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:16:02,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:02,337 INFO L93 Difference]: Finished difference Result 272 states and 341 transitions. [2022-01-30 20:16:02,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-30 20:16:02,338 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-30 20:16:02,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:02,339 INFO L225 Difference]: With dead ends: 272 [2022-01-30 20:16:02,340 INFO L226 Difference]: Without dead ends: 172 [2022-01-30 20:16:02,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1178, Invalid=4522, Unknown=0, NotChecked=0, Total=5700 [2022-01-30 20:16:02,342 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 163 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:02,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 75 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 20:16:02,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-30 20:16:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2022-01-30 20:16:02,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 154 states have (on average 1.2142857142857142) internal successors, (187), 155 states have internal predecessors, (187), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 20:16:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 194 transitions. [2022-01-30 20:16:02,352 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 194 transitions. Word has length 106 [2022-01-30 20:16:02,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:02,353 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 194 transitions. [2022-01-30 20:16:02,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 20:16:02,353 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 194 transitions. [2022-01-30 20:16:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-30 20:16:02,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:02,354 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:16:02,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 20:16:02,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-30 20:16:02,572 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash -132856466, now seen corresponding path program 1 times [2022-01-30 20:16:02,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:02,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653139791] [2022-01-30 20:16:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:02,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:02,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:02,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-30 20:16:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-01-30 20:16:02,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:02,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653139791] [2022-01-30 20:16:02,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653139791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:02,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978578210] [2022-01-30 20:16:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:02,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:02,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:02,877 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) [2022-01-30 20:16:02,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 20:16:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:02,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-30 20:16:02,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-01-30 20:16:03,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-01-30 20:16:03,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978578210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:03,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:03,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-01-30 20:16:03,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814959300] [2022-01-30 20:16:03,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:03,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-30 20:16:03,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-30 20:16:03,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-30 20:16:03,908 INFO L87 Difference]: Start difference. First operand 162 states and 194 transitions. Second operand has 54 states, 54 states have (on average 2.3333333333333335) internal successors, (126), 53 states have internal predecessors, (126), 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) [2022-01-30 20:16:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:05,035 INFO L93 Difference]: Finished difference Result 321 states and 410 transitions. [2022-01-30 20:16:05,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-30 20:16:05,035 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3333333333333335) internal successors, (126), 53 states have internal predecessors, (126), 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 116 [2022-01-30 20:16:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:05,038 INFO L225 Difference]: With dead ends: 321 [2022-01-30 20:16:05,038 INFO L226 Difference]: Without dead ends: 214 [2022-01-30 20:16:05,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-01-30 20:16:05,044 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:05,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 50 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 20:16:05,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-30 20:16:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-01-30 20:16:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 206 states have (on average 1.1601941747572815) internal successors, (239), 207 states have internal predecessors, (239), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 20:16:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 246 transitions. [2022-01-30 20:16:05,060 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 246 transitions. Word has length 116 [2022-01-30 20:16:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:05,060 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 246 transitions. [2022-01-30 20:16:05,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3333333333333335) internal successors, (126), 53 states have internal predecessors, (126), 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) [2022-01-30 20:16:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 246 transitions. [2022-01-30 20:16:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-30 20:16:05,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:05,062 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:16:05,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-30 20:16:05,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:05,275 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:05,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:05,275 INFO L85 PathProgramCache]: Analyzing trace with hash 81459810, now seen corresponding path program 2 times [2022-01-30 20:16:05,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:05,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325722548] [2022-01-30 20:16:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:05,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:06,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:06,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-30 20:16:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 2 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-01-30 20:16:06,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:06,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325722548] [2022-01-30 20:16:06,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325722548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:06,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756075533] [2022-01-30 20:16:06,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 20:16:06,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:06,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:06,282 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) [2022-01-30 20:16:06,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 20:16:06,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 20:16:06,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:16:06,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-30 20:16:06,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-01-30 20:16:06,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 2 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-01-30 20:16:09,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756075533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:09,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:09,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-01-30 20:16:09,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293076675] [2022-01-30 20:16:09,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:09,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-30 20:16:09,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:09,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-30 20:16:09,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-30 20:16:09,187 INFO L87 Difference]: Start difference. First operand 214 states and 246 transitions. Second operand has 106 states, 106 states have (on average 2.169811320754717) internal successors, (230), 105 states have internal predecessors, (230), 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) [2022-01-30 20:16:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:12,665 INFO L93 Difference]: Finished difference Result 425 states and 540 transitions. [2022-01-30 20:16:12,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-30 20:16:12,676 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.169811320754717) internal successors, (230), 105 states have internal predecessors, (230), 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 168 [2022-01-30 20:16:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:12,678 INFO L225 Difference]: With dead ends: 425 [2022-01-30 20:16:12,678 INFO L226 Difference]: Without dead ends: 318 [2022-01-30 20:16:12,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=16173, Invalid=26883, Unknown=0, NotChecked=0, Total=43056 [2022-01-30 20:16:12,686 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 278 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:12,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 50 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 20:16:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-30 20:16:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2022-01-30 20:16:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 310 states have (on average 1.1064516129032258) internal successors, (343), 311 states have internal predecessors, (343), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 20:16:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 350 transitions. [2022-01-30 20:16:12,695 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 350 transitions. Word has length 168 [2022-01-30 20:16:12,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:12,696 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 350 transitions. [2022-01-30 20:16:12,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.169811320754717) internal successors, (230), 105 states have internal predecessors, (230), 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) [2022-01-30 20:16:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 350 transitions. [2022-01-30 20:16:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-30 20:16:12,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:12,698 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:16:12,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 20:16:12,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 20:16:12,915 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:12,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:12,916 INFO L85 PathProgramCache]: Analyzing trace with hash -339087798, now seen corresponding path program 3 times [2022-01-30 20:16:12,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:12,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350706924] [2022-01-30 20:16:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:12,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:16,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:16,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2022-01-30 20:16:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10696 backedges. 2 proven. 10404 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-01-30 20:16:16,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350706924] [2022-01-30 20:16:16,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350706924] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130649115] [2022-01-30 20:16:16,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 20:16:16,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:16,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:16,120 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) [2022-01-30 20:16:16,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 20:16:16,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-30 20:16:16,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:16:16,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-30 20:16:16,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:18,957 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#a~0.offset_BEFORE_CALL_1| Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|))) (<= (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_1| 4)) (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_1| 8))))) is different from true [2022-01-30 20:16:23,314 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-30 20:16:23,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 13 [2022-01-30 20:16:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10696 backedges. 1 proven. 68 refuted. 0 times theorem prover too weak. 10626 trivial. 1 not checked. [2022-01-30 20:16:25,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:26,363 INFO L353 Elim1Store]: treesize reduction 87, result has 34.6 percent of original size [2022-01-30 20:16:26,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 55 [2022-01-30 20:16:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10696 backedges. 14 proven. 56 refuted. 0 times theorem prover too weak. 10626 trivial. 0 not checked. [2022-01-30 20:16:26,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130649115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:26,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:26,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 17, 16] total 130 [2022-01-30 20:16:26,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889937995] [2022-01-30 20:16:26,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:26,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-30 20:16:26,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:26,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-30 20:16:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5556, Invalid=10958, Unknown=2, NotChecked=254, Total=16770 [2022-01-30 20:16:26,654 INFO L87 Difference]: Start difference. First operand 318 states and 350 transitions. Second operand has 130 states, 127 states have (on average 2.125984251968504) internal successors, (270), 127 states have internal predecessors, (270), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:20:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:20:27,515 INFO L93 Difference]: Finished difference Result 492 states and 578 transitions. [2022-01-30 20:20:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-30 20:20:27,516 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 127 states have (on average 2.125984251968504) internal successors, (270), 127 states have internal predecessors, (270), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 272 [2022-01-30 20:20:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:20:27,518 INFO L225 Difference]: With dead ends: 492 [2022-01-30 20:20:27,518 INFO L226 Difference]: Without dead ends: 385 [2022-01-30 20:20:27,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 521 SyntacticMatches, 3 SemanticMatches, 252 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11058 ImplicationChecksByTransitivity, 252.5s TimeCoverageRelationStatistics Valid=16672, Invalid=46971, Unknown=117, NotChecked=502, Total=64262 [2022-01-30 20:20:27,522 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 287 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 20:20:27,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 175 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 952 Invalid, 0 Unknown, 186 Unchecked, 0.5s Time] [2022-01-30 20:20:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-30 20:20:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 328. [2022-01-30 20:20:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 318 states have (on average 1.1037735849056605) internal successors, (351), 319 states have internal predecessors, (351), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:20:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 360 transitions. [2022-01-30 20:20:27,532 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 360 transitions. Word has length 272 [2022-01-30 20:20:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:20:27,532 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 360 transitions. [2022-01-30 20:20:27,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 127 states have (on average 2.125984251968504) internal successors, (270), 127 states have internal predecessors, (270), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:20:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 360 transitions. [2022-01-30 20:20:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-01-30 20:20:27,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:20:27,534 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 14, 14, 14, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:20:27,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 20:20:27,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-30 20:20:27,751 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:20:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:20:27,752 INFO L85 PathProgramCache]: Analyzing trace with hash 667473346, now seen corresponding path program 4 times [2022-01-30 20:20:27,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:20:27,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268682124] [2022-01-30 20:20:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:20:27,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:20:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:20:31,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:20:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:20:31,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2022-01-30 20:20:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:20:31,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2022-01-30 20:20:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:20:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10913 backedges. 4 proven. 10609 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-01-30 20:20:31,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:20:31,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268682124] [2022-01-30 20:20:31,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268682124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:20:31,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645231176] [2022-01-30 20:20:31,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 20:20:31,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:20:31,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:20:31,152 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) [2022-01-30 20:20:31,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 20:20:31,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 20:20:31,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:20:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 20:20:31,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:20:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10913 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 10625 trivial. 0 not checked. [2022-01-30 20:20:32,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:20:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10913 backedges. 5 proven. 287 refuted. 0 times theorem prover too weak. 10621 trivial. 0 not checked. [2022-01-30 20:20:33,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645231176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:20:33,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:20:33,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 17, 17] total 137 [2022-01-30 20:20:33,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178553795] [2022-01-30 20:20:33,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:20:33,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-30 20:20:33,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:20:33,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-30 20:20:33,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6062, Invalid=12570, Unknown=0, NotChecked=0, Total=18632 [2022-01-30 20:20:33,191 INFO L87 Difference]: Start difference. First operand 328 states and 360 transitions. Second operand has 137 states, 137 states have (on average 2.3649635036496353) internal successors, (324), 136 states have internal predecessors, (324), 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) [2022-01-30 20:20:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:20:39,238 INFO L93 Difference]: Finished difference Result 542 states and 670 transitions. [2022-01-30 20:20:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-30 20:20:39,238 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.3649635036496353) internal successors, (324), 136 states have internal predecessors, (324), 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 282 [2022-01-30 20:20:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:20:39,240 INFO L225 Difference]: With dead ends: 542 [2022-01-30 20:20:39,240 INFO L226 Difference]: Without dead ends: 427 [2022-01-30 20:20:39,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13651 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=18180, Invalid=54990, Unknown=0, NotChecked=0, Total=73170 [2022-01-30 20:20:39,245 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 490 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 20:20:39,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 57 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 20:20:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-30 20:20:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 426. [2022-01-30 20:20:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 416 states have (on average 1.15625) internal successors, (481), 417 states have internal predecessors, (481), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:20:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 490 transitions. [2022-01-30 20:20:39,258 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 490 transitions. Word has length 282 [2022-01-30 20:20:39,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:20:39,258 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 490 transitions. [2022-01-30 20:20:39,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.3649635036496353) internal successors, (324), 136 states have internal predecessors, (324), 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) [2022-01-30 20:20:39,259 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 490 transitions. [2022-01-30 20:20:39,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-01-30 20:20:39,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:20:39,261 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 30, 30, 30, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:20:39,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-30 20:20:39,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-30 20:20:39,479 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:20:39,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:20:39,479 INFO L85 PathProgramCache]: Analyzing trace with hash -839827100, now seen corresponding path program 5 times [2022-01-30 20:20:39,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:20:39,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197466987] [2022-01-30 20:20:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:20:39,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:20:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:20:42,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:20:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:20:42,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2022-01-30 20:20:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:20:42,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2022-01-30 20:20:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:20:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12168 backedges. 4 proven. 10816 refuted. 0 times theorem prover too weak. 1348 trivial. 0 not checked. [2022-01-30 20:20:42,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:20:42,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197466987] [2022-01-30 20:20:42,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197466987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:20:42,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691640886] [2022-01-30 20:20:42,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 20:20:42,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:20:42,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:20:42,921 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) [2022-01-30 20:20:42,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process