/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/standard_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 21:15:09,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 21:15:10,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 21:15:10,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 21:15:10,078 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 21:15:10,092 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 21:15:10,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 21:15:10,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 21:15:10,093 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 21:15:10,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 21:15:10,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 21:15:10,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 21:15:10,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 21:15:10,094 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 21:15:10,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 21:15:10,094 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 21:15:10,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 21:15:10,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 21:15:10,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 21:15:10,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 21:15:10,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 21:15:10,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 21:15:10,095 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 21:15:10,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 21:15:10,095 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 21:15:10,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 21:15:10,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 21:15:10,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 21:15:10,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 21:15:10,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:15:10,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 21:15:10,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 21:15:10,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 21:15:10,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 21:15:10,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 21:15:10,097 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 21:15:10,097 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 21:15:10,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 21:15:10,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 21:15:10,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 21:15:10,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 21:15:10,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 21:15:10,274 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 21:15:10,275 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 21:15:10,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2022-01-30 21:15:10,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfab5a1e3/73f53140fbca4621ae4703d9a5a2d57e/FLAGafc8eeccb [2022-01-30 21:15:10,673 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 21:15:10,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2022-01-30 21:15:10,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfab5a1e3/73f53140fbca4621ae4703d9a5a2d57e/FLAGafc8eeccb [2022-01-30 21:15:10,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfab5a1e3/73f53140fbca4621ae4703d9a5a2d57e [2022-01-30 21:15:10,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 21:15:10,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 21:15:10,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 21:15:10,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 21:15:10,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 21:15:10,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:15:10" (1/1) ... [2022-01-30 21:15:10,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@584d52bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:10, skipping insertion in model container [2022-01-30 21:15:10,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:15:10" (1/1) ... [2022-01-30 21:15:10,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 21:15:10,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 21:15:10,808 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/standard_partition_ground-2.i[820,833] [2022-01-30 21:15:10,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:15:10,848 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 21:15:10,859 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/standard_partition_ground-2.i[820,833] [2022-01-30 21:15:10,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:15:10,886 INFO L208 MainTranslator]: Completed translation [2022-01-30 21:15:10,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:10 WrapperNode [2022-01-30 21:15:10,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 21:15:10,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 21:15:10,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 21:15:10,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 21:15:10,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:10" (1/1) ... [2022-01-30 21:15:10,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:10" (1/1) ... [2022-01-30 21:15:10,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:10" (1/1) ... [2022-01-30 21:15:10,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:10" (1/1) ... [2022-01-30 21:15:10,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:10" (1/1) ... [2022-01-30 21:15:10,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:10" (1/1) ... [2022-01-30 21:15:10,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:10" (1/1) ... [2022-01-30 21:15:10,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 21:15:10,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 21:15:10,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 21:15:10,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 21:15:10,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:10" (1/1) ... [2022-01-30 21:15:10,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:15:10,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:10,967 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 21:15:10,977 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 21:15:11,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 21:15:11,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 21:15:11,002 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 21:15:11,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 21:15:11,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 21:15:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 21:15:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 21:15:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 21:15:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 21:15:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 21:15:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 21:15:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 21:15:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 21:15:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 21:15:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 21:15:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 21:15:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 21:15:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 21:15:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 21:15:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 21:15:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 21:15:11,065 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 21:15:11,066 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 21:15:11,206 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 21:15:11,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 21:15:11,211 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-30 21:15:11,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:15:11 BoogieIcfgContainer [2022-01-30 21:15:11,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 21:15:11,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 21:15:11,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 21:15:11,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 21:15:11,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 09:15:10" (1/3) ... [2022-01-30 21:15:11,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be81b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:15:11, skipping insertion in model container [2022-01-30 21:15:11,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:15:10" (2/3) ... [2022-01-30 21:15:11,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be81b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:15:11, skipping insertion in model container [2022-01-30 21:15:11,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:15:11" (3/3) ... [2022-01-30 21:15:11,224 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2022-01-30 21:15:11,228 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 21:15:11,230 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 21:15:11,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 21:15:11,268 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 21:15:11,268 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 21:15:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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 21:15:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 21:15:11,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:11,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:11,281 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:11,286 INFO L85 PathProgramCache]: Analyzing trace with hash -561863510, now seen corresponding path program 1 times [2022-01-30 21:15:11,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:11,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572309614] [2022-01-30 21:15:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:11,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:11,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:11,410 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 21:15:11,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:11,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572309614] [2022-01-30 21:15:11,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572309614] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:15:11,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:15:11,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 21:15:11,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326284964] [2022-01-30 21:15:11,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:15:11,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 21:15:11,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:11,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 21:15:11,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 21:15:11,444 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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 21:15:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:11,466 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-01-30 21:15:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 21:15:11,468 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 21:15:11,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:11,475 INFO L225 Difference]: With dead ends: 54 [2022-01-30 21:15:11,475 INFO L226 Difference]: Without dead ends: 26 [2022-01-30 21:15:11,477 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 21:15:11,480 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 21:15:11,480 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 21:15:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-30 21:15:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-30 21:15:11,499 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 21:15:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-01-30 21:15:11,500 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2022-01-30 21:15:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:11,500 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-01-30 21:15:11,501 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 21:15:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-01-30 21:15:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 21:15:11,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:11,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:11,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 21:15:11,502 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:11,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:11,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2146741530, now seen corresponding path program 1 times [2022-01-30 21:15:11,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:11,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410980087] [2022-01-30 21:15:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:11,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:11,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:11,546 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 21:15:11,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:11,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410980087] [2022-01-30 21:15:11,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410980087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:15:11,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:15:11,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 21:15:11,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295694981] [2022-01-30 21:15:11,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:15:11,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 21:15:11,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 21:15:11,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 21:15:11,549 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 21:15:11,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:11,599 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-01-30 21:15:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 21:15:11,600 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 21:15:11,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:11,601 INFO L225 Difference]: With dead ends: 46 [2022-01-30 21:15:11,601 INFO L226 Difference]: Without dead ends: 28 [2022-01-30 21:15:11,604 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 21:15:11,606 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, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:11,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:15:11,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-30 21:15:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-30 21:15:11,618 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 21:15:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-30 21:15:11,619 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2022-01-30 21:15:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:11,622 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-30 21:15:11,622 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 21:15:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-30 21:15:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-30 21:15:11,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:11,623 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 21:15:11,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 21:15:11,623 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash 347717308, now seen corresponding path program 1 times [2022-01-30 21:15:11,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:11,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676666976] [2022-01-30 21:15:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:11,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:11,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:11,668 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 21:15:11,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:11,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676666976] [2022-01-30 21:15:11,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676666976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:15:11,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:15:11,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 21:15:11,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883034130] [2022-01-30 21:15:11,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:15:11,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 21:15:11,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:11,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 21:15:11,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 21:15:11,670 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:11,725 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-01-30 21:15:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 21:15:11,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-30 21:15:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:11,726 INFO L225 Difference]: With dead ends: 48 [2022-01-30 21:15:11,726 INFO L226 Difference]: Without dead ends: 33 [2022-01-30 21:15:11,726 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 21:15:11,727 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:11,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 31 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:15:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-30 21:15:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-01-30 21:15:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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 21:15:11,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-30 21:15:11,735 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2022-01-30 21:15:11,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:11,735 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-30 21:15:11,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:15:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-30 21:15:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-30 21:15:11,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:11,737 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, 1] [2022-01-30 21:15:11,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-30 21:15:11,737 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:11,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1595161568, now seen corresponding path program 1 times [2022-01-30 21:15:11,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:11,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557878488] [2022-01-30 21:15:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:11,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:11,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:11,788 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 21:15:11,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:11,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557878488] [2022-01-30 21:15:11,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557878488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:11,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065090090] [2022-01-30 21:15:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:11,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:11,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:11,798 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 21:15:11,799 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 21:15:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:11,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 21:15:11,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:15:11,935 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 21:15:11,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:15:11,996 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 21:15:11,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065090090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:15:11,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:15:11,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 21:15:11,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491027332] [2022-01-30 21:15:11,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:15:11,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 21:15:12,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:12,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 21:15:12,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 21:15:12,001 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 21:15:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:12,096 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-01-30 21:15:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 21:15:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-30 21:15:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:12,097 INFO L225 Difference]: With dead ends: 55 [2022-01-30 21:15:12,098 INFO L226 Difference]: Without dead ends: 35 [2022-01-30 21:15:12,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 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 21:15:12,106 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:12,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:15:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-30 21:15:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-30 21:15:12,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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 21:15:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-01-30 21:15:12,116 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2022-01-30 21:15:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:12,117 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-01-30 21:15:12,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 21:15:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-01-30 21:15:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-30 21:15:12,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:12,118 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, 1] [2022-01-30 21:15:12,136 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 21:15:12,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:12,323 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2143213242, now seen corresponding path program 2 times [2022-01-30 21:15:12,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:12,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205992438] [2022-01-30 21:15:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:12,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:12,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-30 21:15:12,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:12,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205992438] [2022-01-30 21:15:12,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205992438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:12,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187979468] [2022-01-30 21:15:12,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:15:12,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:12,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:12,389 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 21:15:12,390 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 21:15:12,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-30 21:15:12,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:15:12,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 21:15:12,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:15:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 21:15:12,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 21:15:12,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187979468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:15:12,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 21:15:12,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-01-30 21:15:12,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735871390] [2022-01-30 21:15:12,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:15:12,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 21:15:12,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:12,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 21:15:12,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-30 21:15:12,517 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 21:15:12,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:12,533 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-01-30 21:15:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 21:15:12,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 30 [2022-01-30 21:15:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:12,535 INFO L225 Difference]: With dead ends: 55 [2022-01-30 21:15:12,535 INFO L226 Difference]: Without dead ends: 38 [2022-01-30 21:15:12,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-30 21:15:12,536 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:12,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:15:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-30 21:15:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-01-30 21:15:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 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 21:15:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-01-30 21:15:12,543 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 30 [2022-01-30 21:15:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:12,543 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-01-30 21:15:12,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 21:15:12,544 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-01-30 21:15:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-30 21:15:12,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:12,545 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, 1] [2022-01-30 21:15:12,564 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 21:15:12,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:12,765 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:12,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1132095992, now seen corresponding path program 1 times [2022-01-30 21:15:12,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:12,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416821817] [2022-01-30 21:15:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:12,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:12,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-30 21:15:12,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:12,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416821817] [2022-01-30 21:15:12,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416821817] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:12,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358676740] [2022-01-30 21:15:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:12,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:12,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:12,837 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 21:15:12,838 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 21:15:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:12,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 21:15:12,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:15:12,985 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 21:15:12,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:15:13,090 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 21:15:13,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358676740] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:15:13,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:15:13,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-30 21:15:13,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082126622] [2022-01-30 21:15:13,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:15:13,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-30 21:15:13,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-30 21:15:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-30 21:15:13,092 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 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 21:15:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:13,293 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2022-01-30 21:15:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-30 21:15:13,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-30 21:15:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:13,295 INFO L225 Difference]: With dead ends: 86 [2022-01-30 21:15:13,295 INFO L226 Difference]: Without dead ends: 64 [2022-01-30 21:15:13,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2022-01-30 21:15:13,296 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:13,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 49 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:15:13,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-30 21:15:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-01-30 21:15:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 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 21:15:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-01-30 21:15:13,300 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 30 [2022-01-30 21:15:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:13,300 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-01-30 21:15:13,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 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 21:15:13,301 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-01-30 21:15:13,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-30 21:15:13,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:13,302 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:13,323 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 21:15:13,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:13,515 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2132878100, now seen corresponding path program 1 times [2022-01-30 21:15:13,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:13,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717148559] [2022-01-30 21:15:13,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:13,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:13,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 21:15:13,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717148559] [2022-01-30 21:15:13,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717148559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620782127] [2022-01-30 21:15:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:13,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:13,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:13,664 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 21:15:13,665 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 21:15:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 21:15:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:15:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 21:15:13,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:15:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 21:15:13,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620782127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:15:13,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:15:13,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-30 21:15:13,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089897598] [2022-01-30 21:15:13,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:15:13,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 21:15:13,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 21:15:13,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-30 21:15:13,996 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 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 21:15:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:14,338 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2022-01-30 21:15:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 21:15:14,338 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 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 48 [2022-01-30 21:15:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:14,339 INFO L225 Difference]: With dead ends: 109 [2022-01-30 21:15:14,339 INFO L226 Difference]: Without dead ends: 80 [2022-01-30 21:15:14,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 86 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 21:15:14,340 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:14,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 55 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:15:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-30 21:15:14,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-01-30 21:15:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 74 states have internal predecessors, (83), 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 21:15:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-01-30 21:15:14,346 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 48 [2022-01-30 21:15:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:14,346 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-01-30 21:15:14,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 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 21:15:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-01-30 21:15:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-30 21:15:14,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:14,347 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:14,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 21:15:14,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:14,547 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash -410849404, now seen corresponding path program 2 times [2022-01-30 21:15:14,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:14,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595361213] [2022-01-30 21:15:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:14,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:14,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 21:15:14,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:14,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595361213] [2022-01-30 21:15:14,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595361213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:14,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171087325] [2022-01-30 21:15:14,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:15:14,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:14,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:14,859 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 21:15:14,860 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 21:15:14,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:15:14,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:15:14,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 21:15:14,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:15:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 21:15:15,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:15:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 21:15:15,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171087325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:15:15,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:15:15,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-30 21:15:15,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682846925] [2022-01-30 21:15:15,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:15:15,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 21:15:15,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 21:15:15,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 21:15:15,661 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 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 21:15:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:16,607 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2022-01-30 21:15:16,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-30 21:15:16,608 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 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 72 [2022-01-30 21:15:16,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:16,608 INFO L225 Difference]: With dead ends: 157 [2022-01-30 21:15:16,609 INFO L226 Difference]: Without dead ends: 128 [2022-01-30 21:15:16,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-30 21:15:16,612 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 115 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:16,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 55 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:15:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-30 21:15:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-01-30 21:15:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.0737704918032787) internal successors, (131), 122 states have internal predecessors, (131), 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 21:15:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2022-01-30 21:15:16,620 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 72 [2022-01-30 21:15:16,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:16,620 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2022-01-30 21:15:16,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 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 21:15:16,620 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2022-01-30 21:15:16,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-30 21:15:16,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:16,621 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:16,645 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 21:15:16,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:16,836 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:16,836 INFO L85 PathProgramCache]: Analyzing trace with hash -110478156, now seen corresponding path program 3 times [2022-01-30 21:15:16,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:16,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917522254] [2022-01-30 21:15:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:16,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:17,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 21:15:17,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:17,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917522254] [2022-01-30 21:15:17,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917522254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:17,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400537311] [2022-01-30 21:15:17,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:15:17,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:17,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:17,651 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 21:15:17,652 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 21:15:17,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 21:15:17,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:15:17,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 21:15:17,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:15:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2121 trivial. 0 not checked. [2022-01-30 21:15:17,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:15:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2121 trivial. 0 not checked. [2022-01-30 21:15:18,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400537311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:15:18,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:15:18,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 5, 5] total 56 [2022-01-30 21:15:18,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436357698] [2022-01-30 21:15:18,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:15:18,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-30 21:15:18,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:18,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-30 21:15:18,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=1875, Unknown=0, NotChecked=0, Total=3080 [2022-01-30 21:15:18,201 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 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 21:15:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:19,617 INFO L93 Difference]: Finished difference Result 198 states and 234 transitions. [2022-01-30 21:15:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-30 21:15:19,618 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 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 120 [2022-01-30 21:15:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:19,619 INFO L225 Difference]: With dead ends: 198 [2022-01-30 21:15:19,619 INFO L226 Difference]: Without dead ends: 169 [2022-01-30 21:15:19,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4173, Invalid=7599, Unknown=0, NotChecked=0, Total=11772 [2022-01-30 21:15:19,622 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 246 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:19,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 69 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:15:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-30 21:15:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2022-01-30 21:15:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.13125) internal successors, (181), 160 states have internal predecessors, (181), 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 21:15:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 186 transitions. [2022-01-30 21:15:19,636 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 186 transitions. Word has length 120 [2022-01-30 21:15:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:19,638 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 186 transitions. [2022-01-30 21:15:19,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 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 21:15:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 186 transitions. [2022-01-30 21:15:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-30 21:15:19,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:19,644 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:19,667 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 21:15:19,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:19,860 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:19,860 INFO L85 PathProgramCache]: Analyzing trace with hash 250678614, now seen corresponding path program 4 times [2022-01-30 21:15:19,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:19,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670044149] [2022-01-30 21:15:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:19,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:20,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-30 21:15:20,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:20,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670044149] [2022-01-30 21:15:20,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670044149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:20,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944600720] [2022-01-30 21:15:20,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 21:15:20,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:20,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:20,675 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 21:15:20,680 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 21:15:20,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 21:15:20,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:15:20,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 21:15:20,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:15:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2260 trivial. 0 not checked. [2022-01-30 21:15:21,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:15:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2260 trivial. 0 not checked. [2022-01-30 21:15:21,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944600720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:15:21,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:15:21,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 9, 9] total 65 [2022-01-30 21:15:21,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069736448] [2022-01-30 21:15:21,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:15:21,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-30 21:15:21,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:15:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-30 21:15:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1346, Invalid=2814, Unknown=0, NotChecked=0, Total=4160 [2022-01-30 21:15:21,421 INFO L87 Difference]: Start difference. First operand 166 states and 186 transitions. Second operand has 65 states, 65 states have (on average 2.5076923076923077) internal successors, (163), 64 states have internal predecessors, (163), 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 21:15:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:15:23,229 INFO L93 Difference]: Finished difference Result 308 states and 388 transitions. [2022-01-30 21:15:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-30 21:15:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.5076923076923077) internal successors, (163), 64 states have internal predecessors, (163), 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 146 [2022-01-30 21:15:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:15:23,235 INFO L225 Difference]: With dead ends: 308 [2022-01-30 21:15:23,235 INFO L226 Difference]: Without dead ends: 243 [2022-01-30 21:15:23,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5376, Invalid=10626, Unknown=0, NotChecked=0, Total=16002 [2022-01-30 21:15:23,241 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 527 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 21:15:23,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 69 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 21:15:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-30 21:15:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2022-01-30 21:15:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.1923076923076923) internal successors, (279), 234 states have internal predecessors, (279), 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 21:15:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 284 transitions. [2022-01-30 21:15:23,252 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 284 transitions. Word has length 146 [2022-01-30 21:15:23,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:15:23,252 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 284 transitions. [2022-01-30 21:15:23,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.5076923076923077) internal successors, (163), 64 states have internal predecessors, (163), 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 21:15:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 284 transitions. [2022-01-30 21:15:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-30 21:15:23,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:15:23,253 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:15:23,274 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 21:15:23,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:23,456 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:15:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:15:23,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1550990216, now seen corresponding path program 5 times [2022-01-30 21:15:23,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:15:23,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368529759] [2022-01-30 21:15:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:15:23,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:15:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:24,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:15:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:15:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2878 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-01-30 21:15:24,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:15:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368529759] [2022-01-30 21:15:24,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368529759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:15:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782132914] [2022-01-30 21:15:24,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 21:15:24,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:15:24,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:15:24,264 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 21:15:24,265 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 21:16:50,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-01-30 21:16:50,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:16:50,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 21:16:50,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:16:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2878 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2022-01-30 21:16:50,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:16:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2878 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2022-01-30 21:16:51,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782132914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:16:51,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:16:51,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 17, 17] total 82 [2022-01-30 21:16:51,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874194611] [2022-01-30 21:16:51,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:16:51,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-30 21:16:51,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:16:51,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-30 21:16:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=4870, Unknown=0, NotChecked=0, Total=6642 [2022-01-30 21:16:51,370 INFO L87 Difference]: Start difference. First operand 240 states and 284 transitions. Second operand has 82 states, 82 states have (on average 2.5609756097560976) internal successors, (210), 81 states have internal predecessors, (210), 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 21:16:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:16:54,119 INFO L93 Difference]: Finished difference Result 526 states and 694 transitions. [2022-01-30 21:16:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-30 21:16:54,120 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.5609756097560976) internal successors, (210), 81 states have internal predecessors, (210), 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 196 [2022-01-30 21:16:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:16:54,121 INFO L225 Difference]: With dead ends: 526 [2022-01-30 21:16:54,121 INFO L226 Difference]: Without dead ends: 389 [2022-01-30 21:16:54,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4660 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8250, Invalid=17510, Unknown=0, NotChecked=0, Total=25760 [2022-01-30 21:16:54,125 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 855 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 21:16:54,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 94 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 21:16:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-30 21:16:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 386. [2022-01-30 21:16:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 380 states have (on average 1.2447368421052631) internal successors, (473), 380 states have internal predecessors, (473), 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 21:16:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 478 transitions. [2022-01-30 21:16:54,133 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 478 transitions. Word has length 196 [2022-01-30 21:16:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:16:54,134 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 478 transitions. [2022-01-30 21:16:54,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.5609756097560976) internal successors, (210), 81 states have internal predecessors, (210), 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 21:16:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 478 transitions. [2022-01-30 21:16:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-30 21:16:54,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:16:54,141 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:16:54,187 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 21:16:54,351 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,SelfDestructingSolverStorable10 [2022-01-30 21:16:54,351 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:16:54,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:16:54,361 INFO L85 PathProgramCache]: Analyzing trace with hash -455688934, now seen corresponding path program 6 times [2022-01-30 21:16:54,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:16:54,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187458645] [2022-01-30 21:16:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:16:54,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:16:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:16:55,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:16:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:16:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:16:55,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:16:55,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187458645] [2022-01-30 21:16:55,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187458645] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:16:55,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51050005] [2022-01-30 21:16:55,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 21:16:55,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:16:55,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:16:55,245 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 21:16:55,246 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 21:16:55,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-30 21:16:55,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:16:55,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 21:16:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:16:55,683 INFO L353 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-01-30 21:16:55,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-01-30 21:16:55,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 21:16:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 29 proven. 59 refuted. 0 times theorem prover too weak. 4983 trivial. 0 not checked. [2022-01-30 21:16:55,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:16:56,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 21:16:56,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-01-30 21:16:56,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-01-30 21:16:56,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-01-30 21:16:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4983 trivial. 0 not checked. [2022-01-30 21:16:56,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51050005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:16:56,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:16:56,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 62 [2022-01-30 21:16:56,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740373057] [2022-01-30 21:16:56,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:16:56,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-30 21:16:56,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:16:56,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-30 21:16:56,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1350, Invalid=2432, Unknown=0, NotChecked=0, Total=3782 [2022-01-30 21:16:56,555 INFO L87 Difference]: Start difference. First operand 386 states and 478 transitions. Second operand has 62 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 60 states have internal predecessors, (142), 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 21:16:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:16:58,119 INFO L93 Difference]: Finished difference Result 861 states and 1107 transitions. [2022-01-30 21:16:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-30 21:16:58,119 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 60 states have internal predecessors, (142), 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 294 [2022-01-30 21:16:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:16:58,122 INFO L225 Difference]: With dead ends: 861 [2022-01-30 21:16:58,122 INFO L226 Difference]: Without dead ends: 580 [2022-01-30 21:16:58,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 579 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4141, Invalid=9901, Unknown=0, NotChecked=0, Total=14042 [2022-01-30 21:16:58,124 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 156 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:16:58,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 79 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 452 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-01-30 21:16:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-30 21:16:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 573. [2022-01-30 21:16:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 565 states have (on average 1.2707964601769912) internal successors, (718), 566 states have internal predecessors, (718), 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 21:16:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 725 transitions. [2022-01-30 21:16:58,141 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 725 transitions. Word has length 294 [2022-01-30 21:16:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:16:58,141 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 725 transitions. [2022-01-30 21:16:58,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 60 states have internal predecessors, (142), 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 21:16:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 725 transitions. [2022-01-30 21:16:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-01-30 21:16:58,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:16:58,144 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 30, 30, 30, 30, 30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:16:58,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 21:16:58,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:16:58,369 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:16:58,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:16:58,370 INFO L85 PathProgramCache]: Analyzing trace with hash -220932226, now seen corresponding path program 7 times [2022-01-30 21:16:58,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:16:58,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923063729] [2022-01-30 21:16:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:16:58,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:16:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:16:59,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:16:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:16:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5170 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:16:59,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:16:59,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923063729] [2022-01-30 21:16:59,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923063729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:16:59,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809609544] [2022-01-30 21:16:59,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 21:16:59,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:16:59,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:16:59,311 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 21:16:59,312 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 21:16:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:16:59,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-30 21:16:59,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:16:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5170 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:16:59,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:17:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5170 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:17:02,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809609544] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:17:02,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:17:02,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-01-30 21:17:02,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855985854] [2022-01-30 21:17:02,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:17:02,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-30 21:17:02,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:17:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-30 21:17:02,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-30 21:17:02,475 INFO L87 Difference]: Start difference. First operand 573 states and 725 transitions. Second operand has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 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 21:17:05,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:17:05,944 INFO L93 Difference]: Finished difference Result 1143 states and 1498 transitions. [2022-01-30 21:17:05,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-30 21:17:05,944 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 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 296 [2022-01-30 21:17:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:17:05,947 INFO L225 Difference]: With dead ends: 1143 [2022-01-30 21:17:05,948 INFO L226 Difference]: Without dead ends: 677 [2022-01-30 21:17:05,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=16173, Invalid=26883, Unknown=0, NotChecked=0, Total=43056 [2022-01-30 21:17:05,951 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 227 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 21:17:05,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 70 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 21:17:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-30 21:17:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2022-01-30 21:17:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 669 states have (on average 1.2286995515695067) internal successors, (822), 670 states have internal predecessors, (822), 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 21:17:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 829 transitions. [2022-01-30 21:17:05,966 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 829 transitions. Word has length 296 [2022-01-30 21:17:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:17:05,966 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 829 transitions. [2022-01-30 21:17:05,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 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 21:17:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 829 transitions. [2022-01-30 21:17:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-01-30 21:17:05,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:17:05,971 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 30, 30, 30, 30, 30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:17:05,992 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 21:17:06,179 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,SelfDestructingSolverStorable12 [2022-01-30 21:17:06,180 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:17:06,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:17:06,180 INFO L85 PathProgramCache]: Analyzing trace with hash 147316070, now seen corresponding path program 8 times [2022-01-30 21:17:06,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:17:06,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698492380] [2022-01-30 21:17:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:17:06,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:17:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:17:09,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:17:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:17:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13074 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:17:09,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:17:09,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698492380] [2022-01-30 21:17:09,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698492380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:17:09,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124112847] [2022-01-30 21:17:09,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:17:09,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:17:09,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:17:09,373 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 21:17:09,374 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 21:17:09,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:17:09,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:17:09,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 104 conjunts are in the unsatisfiable core [2022-01-30 21:17:09,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:17:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13074 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:17:10,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:17:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13074 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:17:19,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124112847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:17:19,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:17:19,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 210 [2022-01-30 21:17:19,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944795344] [2022-01-30 21:17:19,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:17:19,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 210 states [2022-01-30 21:17:19,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:17:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2022-01-30 21:17:19,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21738, Invalid=22152, Unknown=0, NotChecked=0, Total=43890 [2022-01-30 21:17:19,298 INFO L87 Difference]: Start difference. First operand 677 states and 829 transitions. Second operand has 210 states, 210 states have (on average 2.0619047619047617) internal successors, (433), 209 states have internal predecessors, (433), 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 21:17:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:17:32,100 INFO L93 Difference]: Finished difference Result 1351 states and 1758 transitions. [2022-01-30 21:17:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2022-01-30 21:17:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 210 states, 210 states have (on average 2.0619047619047617) internal successors, (433), 209 states have internal predecessors, (433), 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 400 [2022-01-30 21:17:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:17:32,103 INFO L225 Difference]: With dead ends: 1351 [2022-01-30 21:17:32,103 INFO L226 Difference]: Without dead ends: 885 [2022-01-30 21:17:32,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26980 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=64793, Invalid=107847, Unknown=0, NotChecked=0, Total=172640 [2022-01-30 21:17:32,113 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 435 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 21:17:32,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 70 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-30 21:17:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-01-30 21:17:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 885. [2022-01-30 21:17:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 877 states have (on average 1.1744583808437856) internal successors, (1030), 878 states have internal predecessors, (1030), 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 21:17:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1037 transitions. [2022-01-30 21:17:32,131 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1037 transitions. Word has length 400 [2022-01-30 21:17:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:17:32,132 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 1037 transitions. [2022-01-30 21:17:32,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 210 states, 210 states have (on average 2.0619047619047617) internal successors, (433), 209 states have internal predecessors, (433), 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 21:17:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1037 transitions. [2022-01-30 21:17:32,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2022-01-30 21:17:32,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:17:32,139 INFO L514 BasicCegarLoop]: trace histogram [206, 206, 30, 30, 30, 30, 30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:17:32,161 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 21:17:32,351 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,SelfDestructingSolverStorable13 [2022-01-30 21:17:32,351 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:17:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:17:32,352 INFO L85 PathProgramCache]: Analyzing trace with hash -165277386, now seen corresponding path program 9 times [2022-01-30 21:17:32,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:17:32,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975928198] [2022-01-30 21:17:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:17:32,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:17:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:17:44,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:17:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:17:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 45106 backedges. 0 proven. 42436 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:17:44,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:17:44,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975928198] [2022-01-30 21:17:44,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975928198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:17:44,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492750805] [2022-01-30 21:17:44,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:17:44,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:17:44,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:17:44,366 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 21:17:44,366 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 21:17:44,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 21:17:44,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:17:44,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-30 21:17:44,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:17:44,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-30 21:17:45,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-30 21:17:46,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 21:17:46,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-01-30 21:17:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 45106 backedges. 29 proven. 147 refuted. 0 times theorem prover too weak. 44930 trivial. 0 not checked. [2022-01-30 21:17:46,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:17:47,622 INFO L353 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-01-30 21:17:47,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-01-30 21:17:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 45106 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 44930 trivial. 0 not checked. [2022-01-30 21:17:48,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492750805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:17:48,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:17:48,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [210, 10, 10] total 223 [2022-01-30 21:17:48,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966222014] [2022-01-30 21:17:48,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:17:48,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 223 states [2022-01-30 21:17:48,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:17:48,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2022-01-30 21:17:48,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21790, Invalid=27716, Unknown=0, NotChecked=0, Total=49506 [2022-01-30 21:17:48,346 INFO L87 Difference]: Start difference. First operand 885 states and 1037 transitions. Second operand has 223 states, 223 states have (on average 2.071748878923767) internal successors, (462), 222 states have internal predecessors, (462), 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 21:18:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:18:07,580 INFO L93 Difference]: Finished difference Result 1714 states and 2082 transitions. [2022-01-30 21:18:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-01-30 21:18:07,581 INFO L78 Accepts]: Start accepts. Automaton has has 223 states, 223 states have (on average 2.071748878923767) internal successors, (462), 222 states have internal predecessors, (462), 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 608 [2022-01-30 21:18:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:18:07,585 INFO L225 Difference]: With dead ends: 1714 [2022-01-30 21:18:07,585 INFO L226 Difference]: Without dead ends: 1248 [2022-01-30 21:18:07,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1860 GetRequests, 1415 SyntacticMatches, 2 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 28138 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=68125, Invalid=129455, Unknown=0, NotChecked=0, Total=197580 [2022-01-30 21:18:07,598 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1295 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 780 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 21:18:07,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 87 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 606 Invalid, 0 Unknown, 780 Unchecked, 0.6s Time] [2022-01-30 21:18:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-01-30 21:18:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1071. [2022-01-30 21:18:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1063 states have (on average 1.2022577610536218) internal successors, (1278), 1064 states have internal predecessors, (1278), 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 21:18:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1285 transitions. [2022-01-30 21:18:07,627 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1285 transitions. Word has length 608 [2022-01-30 21:18:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:18:07,628 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1285 transitions. [2022-01-30 21:18:07,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 223 states, 223 states have (on average 2.071748878923767) internal successors, (462), 222 states have internal predecessors, (462), 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 21:18:07,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1285 transitions. [2022-01-30 21:18:07,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2022-01-30 21:18:07,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:18:07,632 INFO L514 BasicCegarLoop]: trace histogram [207, 207, 30, 30, 30, 30, 29, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:18:07,653 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 21:18:07,847 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,SelfDestructingSolverStorable14 [2022-01-30 21:18:07,847 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:18:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:18:07,848 INFO L85 PathProgramCache]: Analyzing trace with hash -251532070, now seen corresponding path program 1 times [2022-01-30 21:18:07,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:18:07,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258551085] [2022-01-30 21:18:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:18:07,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:18:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:18:20,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:18:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:18:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 45519 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:18:20,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:18:20,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258551085] [2022-01-30 21:18:20,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258551085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:18:20,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809935479] [2022-01-30 21:18:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:18:20,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:18:20,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:18:20,025 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 21:18:20,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 21:18:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:18:20,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 2470 conjuncts, 209 conjunts are in the unsatisfiable core [2022-01-30 21:18:20,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:18:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 45519 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:18:21,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:18:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 45519 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:18:58,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809935479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:18:58,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:18:58,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [211, 210, 210] total 420 [2022-01-30 21:18:58,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450146478] [2022-01-30 21:18:58,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:18:58,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 420 states [2022-01-30 21:18:58,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:18:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 420 interpolants. [2022-01-30 21:18:58,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87573, Invalid=88407, Unknown=0, NotChecked=0, Total=175980 [2022-01-30 21:18:58,069 INFO L87 Difference]: Start difference. First operand 1071 states and 1285 transitions. Second operand has 420 states, 420 states have (on average 2.033333333333333) internal successors, (854), 419 states have internal predecessors, (854), 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 21:19:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:19:51,781 INFO L93 Difference]: Finished difference Result 2139 states and 2775 transitions. [2022-01-30 21:19:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 419 states. [2022-01-30 21:19:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 420 states, 420 states have (on average 2.033333333333333) internal successors, (854), 419 states have internal predecessors, (854), 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 610 [2022-01-30 21:19:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:19:51,786 INFO L225 Difference]: With dead ends: 2139 [2022-01-30 21:19:51,786 INFO L226 Difference]: Without dead ends: 1489 [2022-01-30 21:19:51,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1847 GetRequests, 1013 SyntacticMatches, 0 SemanticMatches, 834 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109090 ImplicationChecksByTransitivity, 96.9s TimeCoverageRelationStatistics Valid=261878, Invalid=436182, Unknown=0, NotChecked=0, Total=698060 [2022-01-30 21:19:51,879 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 855 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:19:51,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 65 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-30 21:19:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2022-01-30 21:19:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1489. [2022-01-30 21:19:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1481 states have (on average 1.1451721809588116) internal successors, (1696), 1482 states have internal predecessors, (1696), 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 21:19:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1703 transitions. [2022-01-30 21:19:51,924 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1703 transitions. Word has length 610 [2022-01-30 21:19:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:19:51,925 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 1703 transitions. [2022-01-30 21:19:51,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 420 states, 420 states have (on average 2.033333333333333) internal successors, (854), 419 states have internal predecessors, (854), 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 21:19:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1703 transitions. [2022-01-30 21:19:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1029 [2022-01-30 21:19:51,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:19:51,935 INFO L514 BasicCegarLoop]: trace histogram [416, 416, 30, 30, 30, 30, 29, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:19:51,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 21:19:52,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-30 21:19:52,145 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:19:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:19:52,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1602469476, now seen corresponding path program 2 times [2022-01-30 21:19:52,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:19:52,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921398677] [2022-01-30 21:19:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:19:52,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:19:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:20:41,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:20:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:20:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 175726 backedges. 0 proven. 173056 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:20:41,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:20:41,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921398677] [2022-01-30 21:20:41,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921398677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:20:41,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896945002] [2022-01-30 21:20:41,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:20:41,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:20:41,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:20:41,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:20:41,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-30 21:20:42,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:20:42,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:20:42,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 4351 conjuncts, 418 conjunts are in the unsatisfiable core [2022-01-30 21:20:42,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:20:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 175726 backedges. 0 proven. 173056 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:20:44,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:23:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 175726 backedges. 0 proven. 173056 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-01-30 21:23:08,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896945002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:23:08,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:23:08,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [420, 419, 419] total 838 [2022-01-30 21:23:08,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578175765] [2022-01-30 21:23:08,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:23:08,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 838 states [2022-01-30 21:23:08,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:23:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 838 interpolants. [2022-01-30 21:23:08,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349868, Invalid=351538, Unknown=0, NotChecked=0, Total=701406 [2022-01-30 21:23:08,742 INFO L87 Difference]: Start difference. First operand 1489 states and 1703 transitions. Second operand has 838 states, 838 states have (on average 2.016706443914081) internal successors, (1690), 837 states have internal predecessors, (1690), 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 21:27:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:27:02,437 INFO L93 Difference]: Finished difference Result 2975 states and 3820 transitions. [2022-01-30 21:27:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 837 states. [2022-01-30 21:27:02,439 INFO L78 Accepts]: Start accepts. Automaton has has 838 states, 838 states have (on average 2.016706443914081) internal successors, (1690), 837 states have internal predecessors, (1690), 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 1028 [2022-01-30 21:27:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:27:02,448 INFO L225 Difference]: With dead ends: 2975 [2022-01-30 21:27:02,448 INFO L226 Difference]: Without dead ends: 2325 [2022-01-30 21:27:02,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3310 GetRequests, 1640 SyntacticMatches, 0 SemanticMatches, 1670 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436593 ImplicationChecksByTransitivity, 395.3s TimeCoverageRelationStatistics Valid=1047927, Invalid=1745985, Unknown=0, NotChecked=0, Total=2793912 [2022-01-30 21:27:02,701 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1691 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 1259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1259 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:27:02,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1692 Valid, 75 Invalid, 3137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1259 Valid, 1878 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-30 21:27:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2022-01-30 21:27:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2325. [2022-01-30 21:27:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2317 states have (on average 1.0927924039706518) internal successors, (2532), 2318 states have internal predecessors, (2532), 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 21:27:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 2539 transitions. [2022-01-30 21:27:02,790 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 2539 transitions. Word has length 1028 [2022-01-30 21:27:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:27:02,791 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 2539 transitions. [2022-01-30 21:27:02,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 838 states, 838 states have (on average 2.016706443914081) internal successors, (1690), 837 states have internal predecessors, (1690), 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 21:27:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 2539 transitions. [2022-01-30 21:27:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1865 [2022-01-30 21:27:02,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:27:02,820 INFO L514 BasicCegarLoop]: trace histogram [834, 834, 30, 30, 30, 30, 29, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:27:02,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-30 21:27:03,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:27:03,043 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:27:03,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:27:03,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1006970464, now seen corresponding path program 3 times [2022-01-30 21:27:03,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:27:03,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538640037] [2022-01-30 21:27:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:27:03,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms