/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_two_index_07.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 21:30:03,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 21:30:03,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 21:30:03,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 21:30:03,097 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 21:30:03,120 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 21:30:03,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 21:30:03,120 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 21:30:03,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 21:30:03,121 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 21:30:03,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 21:30:03,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 21:30:03,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 21:30:03,122 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 21:30:03,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 21:30:03,122 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 21:30:03,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 21:30:03,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 21:30:03,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 21:30:03,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 21:30:03,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 21:30:03,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 21:30:03,123 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 21:30:03,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 21:30:03,123 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 21:30:03,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 21:30:03,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 21:30:03,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 21:30:03,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 21:30:03,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:30:03,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 21:30:03,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 21:30:03,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 21:30:03,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 21:30:03,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 21:30:03,124 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 21:30:03,125 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 21:30:03,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 21:30:03,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 21:30:03,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 21:30:03,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 21:30:03,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 21:30:03,319 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 21:30:03,319 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 21:30:03,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_07.i [2022-01-30 21:30:03,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d25bf25a4/41742d8bc67e45c3b7c1701018440d97/FLAG8d7095e60 [2022-01-30 21:30:03,730 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 21:30:03,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_07.i [2022-01-30 21:30:03,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d25bf25a4/41742d8bc67e45c3b7c1701018440d97/FLAG8d7095e60 [2022-01-30 21:30:03,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d25bf25a4/41742d8bc67e45c3b7c1701018440d97 [2022-01-30 21:30:03,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 21:30:03,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 21:30:03,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 21:30:03,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 21:30:03,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 21:30:03,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:30:03" (1/1) ... [2022-01-30 21:30:03,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@541c168d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:30:03, skipping insertion in model container [2022-01-30 21:30:03,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:30:03" (1/1) ... [2022-01-30 21:30:03,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 21:30:03,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 21:30:03,881 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_two_index_07.i[814,827] [2022-01-30 21:30:03,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:30:03,894 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 21:30:03,902 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_two_index_07.i[814,827] [2022-01-30 21:30:03,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:30:03,915 INFO L208 MainTranslator]: Completed translation [2022-01-30 21:30:03,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:30:03 WrapperNode [2022-01-30 21:30:03,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 21:30:03,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 21:30:03,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 21:30:03,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 21:30:03,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:30:03" (1/1) ... [2022-01-30 21:30:03,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:30:03" (1/1) ... [2022-01-30 21:30:03,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:30:03" (1/1) ... [2022-01-30 21:30:03,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:30:03" (1/1) ... [2022-01-30 21:30:03,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:30:03" (1/1) ... [2022-01-30 21:30:03,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:30:03" (1/1) ... [2022-01-30 21:30:03,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:30:03" (1/1) ... [2022-01-30 21:30:03,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 21:30:03,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 21:30:03,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 21:30:03,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 21:30:03,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:30:03" (1/1) ... [2022-01-30 21:30:03,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:30:03,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:30:03,967 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 21:30:03,973 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 21:30:03,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 21:30:03,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 21:30:03,992 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 21:30:03,992 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 21:30:03,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 21:30:03,994 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 21:30:03,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 21:30:03,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 21:30:03,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 21:30:03,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 21:30:03,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 21:30:03,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 21:30:03,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 21:30:03,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 21:30:03,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 21:30:03,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 21:30:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 21:30:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 21:30:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 21:30:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 21:30:03,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 21:30:04,045 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 21:30:04,046 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 21:30:04,163 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 21:30:04,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 21:30:04,167 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 21:30:04,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:30:04 BoogieIcfgContainer [2022-01-30 21:30:04,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 21:30:04,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 21:30:04,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 21:30:04,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 21:30:04,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 09:30:03" (1/3) ... [2022-01-30 21:30:04,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e07f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:30:04, skipping insertion in model container [2022-01-30 21:30:04,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:30:03" (2/3) ... [2022-01-30 21:30:04,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e07f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:30:04, skipping insertion in model container [2022-01-30 21:30:04,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:30:04" (3/3) ... [2022-01-30 21:30:04,192 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_07.i [2022-01-30 21:30:04,195 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 21:30:04,196 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 21:30:04,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 21:30:04,241 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 21:30:04,241 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 21:30:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 21:30:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-30 21:30:04,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:30:04,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:30:04,254 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:30:04,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:30:04,258 INFO L85 PathProgramCache]: Analyzing trace with hash 840989783, now seen corresponding path program 1 times [2022-01-30 21:30:04,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:30:04,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296312023] [2022-01-30 21:30:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:30:04,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:30:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:04,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:30:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:04,439 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 21:30:04,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:30:04,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296312023] [2022-01-30 21:30:04,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296312023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:30:04,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:30:04,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 21:30:04,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042923351] [2022-01-30 21:30:04,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:30:04,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 21:30:04,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:30:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 21:30:04,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 21:30:04,473 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:30:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:30:04,510 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-01-30 21:30:04,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 21:30:04,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-30 21:30:04,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:30:04,520 INFO L225 Difference]: With dead ends: 41 [2022-01-30 21:30:04,520 INFO L226 Difference]: Without dead ends: 19 [2022-01-30 21:30:04,523 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 21:30:04,528 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 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 21:30:04,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:30:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-30 21:30:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-30 21:30:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:30:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-30 21:30:04,555 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-01-30 21:30:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:30:04,555 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-30 21:30:04,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:30:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-30 21:30:04,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-30 21:30:04,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:30:04,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:30:04,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 21:30:04,557 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:30:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:30:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash -519126957, now seen corresponding path program 1 times [2022-01-30 21:30:04,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:30:04,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938991250] [2022-01-30 21:30:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:30:04,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:30:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:04,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:30:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:04,642 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 21:30:04,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:30:04,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938991250] [2022-01-30 21:30:04,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938991250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:30:04,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:30:04,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 21:30:04,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611135341] [2022-01-30 21:30:04,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:30:04,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 21:30:04,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:30:04,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 21:30:04,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 21:30:04,648 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:30:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:30:04,692 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-01-30 21:30:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 21:30:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-30 21:30:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:30:04,694 INFO L225 Difference]: With dead ends: 32 [2022-01-30 21:30:04,694 INFO L226 Difference]: Without dead ends: 20 [2022-01-30 21:30:04,697 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 21:30:04,698 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:30:04,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 26 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:30:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-30 21:30:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-30 21:30:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 21:30:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-30 21:30:04,708 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2022-01-30 21:30:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:30:04,711 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-30 21:30:04,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:30:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-30 21:30:04,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 21:30:04,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:30:04,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:30:04,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 21:30:04,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:30:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:30:04,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1970595897, now seen corresponding path program 1 times [2022-01-30 21:30:04,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:30:04,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663553996] [2022-01-30 21:30:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:30:04,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:30:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:04,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:30:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:30:04,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:30:04,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663553996] [2022-01-30 21:30:04,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663553996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:30:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310714191] [2022-01-30 21:30:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:30:04,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:04,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:30:04,768 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 21:30:04,769 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 21:30:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:04,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 21:30:04,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:30:04,861 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 21:30:04,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 21:30:04,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310714191] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:30:04,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 21:30:04,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-01-30 21:30:04,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871555496] [2022-01-30 21:30:04,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:30:04,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 21:30:04,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:30:04,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 21:30:04,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:30:04,863 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:30:04,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:30:04,876 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-01-30 21:30:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 21:30:04,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-30 21:30:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:30:04,877 INFO L225 Difference]: With dead ends: 34 [2022-01-30 21:30:04,878 INFO L226 Difference]: Without dead ends: 24 [2022-01-30 21:30:04,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:30:04,879 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:30:04,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 30 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:30:04,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-30 21:30:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-01-30 21:30:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:30:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-30 21:30:04,884 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-01-30 21:30:04,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:30:04,884 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-30 21:30:04,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:30:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-30 21:30:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-30 21:30:04,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:30:04,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:30:04,908 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 21:30:05,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:05,100 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:30:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:30:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1217133170, now seen corresponding path program 1 times [2022-01-30 21:30:05,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:30:05,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599132700] [2022-01-30 21:30:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:30:05,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:30:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:05,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:30:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:30:05,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:30:05,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599132700] [2022-01-30 21:30:05,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599132700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:30:05,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413396351] [2022-01-30 21:30:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:30:05,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:05,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:30:05,165 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 21:30:05,166 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 21:30:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:05,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 21:30:05,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:30:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:30:05,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:30:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:30:05,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413396351] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:30:05,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:30:05,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 21:30:05,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574215140] [2022-01-30 21:30:05,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:30:05,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 21:30:05,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:30:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 21:30:05,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 21:30:05,312 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 21:30:05,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:30:05,415 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-01-30 21:30:05,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 21:30:05,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 17 [2022-01-30 21:30:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:30:05,416 INFO L225 Difference]: With dead ends: 44 [2022-01-30 21:30:05,416 INFO L226 Difference]: Without dead ends: 31 [2022-01-30 21:30:05,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 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 21:30:05,420 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:30:05,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 33 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:30:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-30 21:30:05,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-01-30 21:30:05,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 21:30:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-30 21:30:05,434 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2022-01-30 21:30:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:30:05,434 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-30 21:30:05,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 21:30:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-30 21:30:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-30 21:30:05,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:30:05,435 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:30:05,457 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 21:30:05,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-30 21:30:05,653 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:30:05,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:30:05,655 INFO L85 PathProgramCache]: Analyzing trace with hash 47980467, now seen corresponding path program 2 times [2022-01-30 21:30:05,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:30:05,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870581592] [2022-01-30 21:30:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:30:05,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:30:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:05,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:30:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 21:30:05,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:30:05,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870581592] [2022-01-30 21:30:05,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870581592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:30:05,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715312763] [2022-01-30 21:30:05,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:30:05,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:05,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:30:05,737 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 21:30:05,738 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 21:30:05,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:30:05,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:30:05,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 21:30:05,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:30:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 21:30:05,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:30:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 21:30:05,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715312763] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:30:05,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:30:05,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-01-30 21:30:05,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350526476] [2022-01-30 21:30:05,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:30:05,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 21:30:05,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:30:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 21:30:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2022-01-30 21:30:05,950 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 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 21:30:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:30:06,201 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2022-01-30 21:30:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-30 21:30:06,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-30 21:30:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:30:06,222 INFO L225 Difference]: With dead ends: 61 [2022-01-30 21:30:06,222 INFO L226 Difference]: Without dead ends: 47 [2022-01-30 21:30:06,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=500, Unknown=0, NotChecked=0, Total=812 [2022-01-30 21:30:06,223 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:30:06,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 43 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:30:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-30 21:30:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-01-30 21:30:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 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 21:30:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-30 21:30:06,238 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 21 [2022-01-30 21:30:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:30:06,238 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-30 21:30:06,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 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 21:30:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-30 21:30:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-30 21:30:06,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:30:06,239 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:30:06,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-30 21:30:06,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:06,449 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:30:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:30:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash -134339565, now seen corresponding path program 3 times [2022-01-30 21:30:06,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:30:06,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094308227] [2022-01-30 21:30:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:30:06,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:30:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:06,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:30:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-30 21:30:06,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:30:06,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094308227] [2022-01-30 21:30:06,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094308227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:30:06,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344511276] [2022-01-30 21:30:06,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:30:06,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:06,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:30:06,544 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 21:30:06,545 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 21:30:06,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 21:30:06,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:30:06,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 21:30:06,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:30:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-30 21:30:06,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:30:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-30 21:30:06,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344511276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:30:06,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:30:06,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-30 21:30:06,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071692485] [2022-01-30 21:30:06,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:30:06,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 21:30:06,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:30:06,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 21:30:06,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-30 21:30:06,727 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 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 21:30:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:30:06,961 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-01-30 21:30:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-30 21:30:06,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-30 21:30:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:30:06,962 INFO L225 Difference]: With dead ends: 79 [2022-01-30 21:30:06,962 INFO L226 Difference]: Without dead ends: 69 [2022-01-30 21:30:06,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-30 21:30:06,965 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:30:06,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 33 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:30:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-30 21:30:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 41. [2022-01-30 21:30:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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 21:30:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-01-30 21:30:06,974 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 31 [2022-01-30 21:30:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:30:06,974 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-01-30 21:30:06,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 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 21:30:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-01-30 21:30:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-30 21:30:06,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:30:06,975 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:30:06,991 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 21:30:07,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:07,176 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:30:07,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:30:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1149907763, now seen corresponding path program 4 times [2022-01-30 21:30:07,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:30:07,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893059984] [2022-01-30 21:30:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:30:07,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:30:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:07,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:30:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-30 21:30:07,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:30:07,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893059984] [2022-01-30 21:30:07,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893059984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:30:07,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11438926] [2022-01-30 21:30:07,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 21:30:07,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:07,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:30:07,324 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 21:30:07,324 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 21:30:07,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 21:30:07,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:30:07,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-30 21:30:07,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:30:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-30 21:30:07,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:30:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-30 21:30:07,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11438926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:30:07,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:30:07,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-01-30 21:30:07,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591269733] [2022-01-30 21:30:07,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:30:07,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-30 21:30:07,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:30:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-30 21:30:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=778, Unknown=0, NotChecked=0, Total=1482 [2022-01-30 21:30:07,748 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 39 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 38 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:30:08,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:30:08,467 INFO L93 Difference]: Finished difference Result 128 states and 170 transitions. [2022-01-30 21:30:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-30 21:30:08,467 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 38 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-30 21:30:08,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:30:08,468 INFO L225 Difference]: With dead ends: 128 [2022-01-30 21:30:08,468 INFO L226 Difference]: Without dead ends: 106 [2022-01-30 21:30:08,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2106, Invalid=3444, Unknown=0, NotChecked=0, Total=5550 [2022-01-30 21:30:08,470 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:30:08,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 68 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:30:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-30 21:30:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 67. [2022-01-30 21:30:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 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 21:30:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-01-30 21:30:08,487 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 37 [2022-01-30 21:30:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:30:08,487 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-01-30 21:30:08,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 38 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:30:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-01-30 21:30:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-30 21:30:08,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:30:08,490 INFO L514 BasicCegarLoop]: trace histogram [35, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:30:08,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 21:30:08,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:08,701 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:30:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:30:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash -527032142, now seen corresponding path program 5 times [2022-01-30 21:30:08,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:30:08,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762572512] [2022-01-30 21:30:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:30:08,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:30:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:08,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:30:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:30:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-01-30 21:30:08,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:30:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762572512] [2022-01-30 21:30:08,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762572512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:30:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142461225] [2022-01-30 21:30:08,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 21:30:08,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:30:08,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:30:08,859 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 21:30:08,860 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 21:34:09,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-01-30 21:34:09,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:34:09,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-30 21:34:09,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:34:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-30 21:34:10,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:34:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-30 21:34:10,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142461225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:34:10,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:34:10,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 38, 38] total 85 [2022-01-30 21:34:10,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971456264] [2022-01-30 21:34:10,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:34:10,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-30 21:34:10,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:34:10,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-30 21:34:10,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3487, Invalid=3653, Unknown=0, NotChecked=0, Total=7140 [2022-01-30 21:34:10,997 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 85 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 84 states have internal predecessors, (103), 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 21:34:13,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:34:13,147 INFO L93 Difference]: Finished difference Result 203 states and 278 transitions. [2022-01-30 21:34:13,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-30 21:34:13,148 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 84 states have internal predecessors, (103), 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 63 [2022-01-30 21:34:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:34:13,149 INFO L225 Difference]: With dead ends: 203 [2022-01-30 21:34:13,149 INFO L226 Difference]: Without dead ends: 178 [2022-01-30 21:34:13,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9581 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=10455, Invalid=17267, Unknown=0, NotChecked=0, Total=27722 [2022-01-30 21:34:13,154 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 21:34:13,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 33 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 21:34:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-30 21:34:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 120. [2022-01-30 21:34:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 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 21:34:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2022-01-30 21:34:13,164 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 63 [2022-01-30 21:34:13,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:34:13,165 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2022-01-30 21:34:13,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 84 states have internal predecessors, (103), 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 21:34:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2022-01-30 21:34:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-30 21:34:13,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:34:13,166 INFO L514 BasicCegarLoop]: trace histogram [81, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:34:13,240 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 21:34:13,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:34:13,367 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:34:13,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:34:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1086443129, now seen corresponding path program 6 times [2022-01-30 21:34:13,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:34:13,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640984159] [2022-01-30 21:34:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:34:13,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:34:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:34:13,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:34:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:34:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3531 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2022-01-30 21:34:13,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:34:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640984159] [2022-01-30 21:34:13,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640984159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:34:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207300717] [2022-01-30 21:34:13,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 21:34:13,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:34:13,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:34:13,682 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 21:34:13,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process