/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-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 21:43:29,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 21:43:29,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 21:43:29,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 21:43:29,998 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 21:43:30,023 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 21:43:30,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 21:43:30,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 21:43:30,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 21:43:30,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 21:43:30,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 21:43:30,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 21:43:30,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 21:43:30,027 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 21:43:30,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 21:43:30,028 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 21:43:30,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 21:43:30,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 21:43:30,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 21:43:30,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 21:43:30,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 21:43:30,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 21:43:30,029 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 21:43:30,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 21:43:30,029 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 21:43:30,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 21:43:30,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 21:43:30,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 21:43:30,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 21:43:30,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:43:30,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 21:43:30,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 21:43:30,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 21:43:30,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 21:43:30,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 21:43:30,031 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 21:43:30,031 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 21:43:30,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 21:43:30,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 21:43:30,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 21:43:30,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 21:43:30,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 21:43:30,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 21:43:30,269 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 21:43:30,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2022-01-30 21:43:30,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfa1f963d/40d0c59b84d14502a06cdb61063f0455/FLAGafc1ca8b2 [2022-01-30 21:43:30,663 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 21:43:30,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2022-01-30 21:43:30,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfa1f963d/40d0c59b84d14502a06cdb61063f0455/FLAGafc1ca8b2 [2022-01-30 21:43:30,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfa1f963d/40d0c59b84d14502a06cdb61063f0455 [2022-01-30 21:43:30,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 21:43:30,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 21:43:30,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 21:43:30,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 21:43:30,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 21:43:30,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:43:30" (1/1) ... [2022-01-30 21:43:30,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b448a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:43:30, skipping insertion in model container [2022-01-30 21:43:30,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:43:30" (1/1) ... [2022-01-30 21:43:30,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 21:43:30,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 21:43:30,832 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-industry-pattern/array_assert_loop_dep.i[814,827] [2022-01-30 21:43:30,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:43:30,847 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 21:43:30,856 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-industry-pattern/array_assert_loop_dep.i[814,827] [2022-01-30 21:43:30,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:43:30,870 INFO L208 MainTranslator]: Completed translation [2022-01-30 21:43:30,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:43:30 WrapperNode [2022-01-30 21:43:30,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 21:43:30,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 21:43:30,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 21:43:30,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 21:43:30,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:43:30" (1/1) ... [2022-01-30 21:43:30,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:43:30" (1/1) ... [2022-01-30 21:43:30,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:43:30" (1/1) ... [2022-01-30 21:43:30,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:43:30" (1/1) ... [2022-01-30 21:43:30,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:43:30" (1/1) ... [2022-01-30 21:43:30,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:43:30" (1/1) ... [2022-01-30 21:43:30,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:43:30" (1/1) ... [2022-01-30 21:43:30,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 21:43:30,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 21:43:30,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 21:43:30,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 21:43:30,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:43:30" (1/1) ... [2022-01-30 21:43:30,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:43:30,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:43:30,939 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 21:43:30,969 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 21:43:30,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 21:43:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 21:43:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 21:43:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 21:43:30,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 21:43:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 21:43:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 21:43:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 21:43:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 21:43:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 21:43:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 21:43:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 21:43:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 21:43:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 21:43:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 21:43:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 21:43:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 21:43:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 21:43:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 21:43:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 21:43:31,044 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 21:43:31,046 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 21:43:31,177 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 21:43:31,181 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 21:43:31,181 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-30 21:43:31,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:43:31 BoogieIcfgContainer [2022-01-30 21:43:31,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 21:43:31,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 21:43:31,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 21:43:31,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 21:43:31,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 09:43:30" (1/3) ... [2022-01-30 21:43:31,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc13281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:43:31, skipping insertion in model container [2022-01-30 21:43:31,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:43:30" (2/3) ... [2022-01-30 21:43:31,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc13281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:43:31, skipping insertion in model container [2022-01-30 21:43:31,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:43:31" (3/3) ... [2022-01-30 21:43:31,187 INFO L111 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2022-01-30 21:43:31,191 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 21:43:31,191 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 21:43:31,235 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 21:43:31,243 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 21:43:31,243 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 21:43:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 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 21:43:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-30 21:43:31,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:43:31,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:43:31,272 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:43:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:43:31,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1028448074, now seen corresponding path program 1 times [2022-01-30 21:43:31,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:43:31,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077202177] [2022-01-30 21:43:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:43:31,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:43:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:31,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:43:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:31,454 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 21:43:31,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:43:31,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077202177] [2022-01-30 21:43:31,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077202177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:43:31,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:43:31,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 21:43:31,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232023075] [2022-01-30 21:43:31,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:43:31,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 21:43:31,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:43:31,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 21:43:31,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 21:43:31,484 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 21:43:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:43:31,527 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-01-30 21:43:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 21:43:31,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2022-01-30 21:43:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:43:31,537 INFO L225 Difference]: With dead ends: 42 [2022-01-30 21:43:31,538 INFO L226 Difference]: Without dead ends: 20 [2022-01-30 21:43:31,540 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 21:43:31,544 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 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 21:43:31,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:43:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-30 21:43:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-30 21:43:31,568 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 21:43:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-30 21:43:31,570 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-01-30 21:43:31,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:43:31,571 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-30 21:43:31,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 21:43:31,571 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-30 21:43:31,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-30 21:43:31,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:43:31,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:43:31,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 21:43:31,573 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:43:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:43:31,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1606716, now seen corresponding path program 1 times [2022-01-30 21:43:31,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:43:31,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291884938] [2022-01-30 21:43:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:43:31,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:43:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:31,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:43:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:31,653 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 21:43:31,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:43:31,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291884938] [2022-01-30 21:43:31,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291884938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:43:31,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:43:31,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 21:43:31,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45284911] [2022-01-30 21:43:31,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:43:31,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 21:43:31,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:43:31,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 21:43:31,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 21:43:31,659 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 21:43:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:43:31,717 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-01-30 21:43:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 21:43:31,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2022-01-30 21:43:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:43:31,720 INFO L225 Difference]: With dead ends: 39 [2022-01-30 21:43:31,721 INFO L226 Difference]: Without dead ends: 27 [2022-01-30 21:43:31,724 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 21:43:31,725 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:43:31,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:43:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-30 21:43:31,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-30 21:43:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 21:43:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-30 21:43:31,741 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2022-01-30 21:43:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:43:31,743 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-30 21:43:31,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 21:43:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-30 21:43:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-30 21:43:31,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:43:31,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:43:31,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 21:43:31,750 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:43:31,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:43:31,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1695231582, now seen corresponding path program 1 times [2022-01-30 21:43:31,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:43:31,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556365124] [2022-01-30 21:43:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:43:31,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:43:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:31,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:43:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:31,840 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 21:43:31,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:43:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556365124] [2022-01-30 21:43:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556365124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:43:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152628931] [2022-01-30 21:43:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:43:31,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:43:31,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:43:31,860 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 21:43:31,895 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 21:43:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:31,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 21:43:31,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:43:32,030 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 21:43:32,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:43:32,074 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 21:43:32,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152628931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:43:32,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:43:32,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 21:43:32,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717354173] [2022-01-30 21:43:32,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:43:32,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 21:43:32,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:43:32,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 21:43:32,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 21:43:32,076 INFO L87 Difference]: Start difference. First operand 25 states and 28 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 21:43:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:43:32,184 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-01-30 21:43:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 21:43:32,184 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 15 [2022-01-30 21:43:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:43:32,185 INFO L225 Difference]: With dead ends: 59 [2022-01-30 21:43:32,185 INFO L226 Difference]: Without dead ends: 43 [2022-01-30 21:43:32,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 21:43:32,186 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:43:32,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 27 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:43:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-30 21:43:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-01-30 21:43:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 21:43:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-30 21:43:32,193 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 15 [2022-01-30 21:43:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:43:32,193 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-30 21:43:32,194 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 21:43:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-30 21:43:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-30 21:43:32,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:43:32,194 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:43:32,229 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 21:43:32,415 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 21:43:32,416 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:43:32,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:43:32,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1563973180, now seen corresponding path program 2 times [2022-01-30 21:43:32,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:43:32,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59387894] [2022-01-30 21:43:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:43:32,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:43:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:32,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:43:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:43:32,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:43:32,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59387894] [2022-01-30 21:43:32,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59387894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:43:32,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667220924] [2022-01-30 21:43:32,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:43:32,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:43:32,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:43:32,513 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 21:43:32,515 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 21:43:32,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:43:32,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:43:32,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 21:43:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:43:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:43:32,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:43:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:43:32,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667220924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:43:32,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:43:32,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-30 21:43:32,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246748088] [2022-01-30 21:43:32,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:43:32,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 21:43:32,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:43:32,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 21:43:32,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-30 21:43:32,752 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:43:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:43:33,019 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2022-01-30 21:43:33,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 21:43:33,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-30 21:43:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:43:33,026 INFO L225 Difference]: With dead ends: 106 [2022-01-30 21:43:33,026 INFO L226 Difference]: Without dead ends: 85 [2022-01-30 21:43:33,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-30 21:43:33,030 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 117 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:43:33,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 37 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:43:33,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-30 21:43:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2022-01-30 21:43:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-30 21:43:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-01-30 21:43:33,051 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 21 [2022-01-30 21:43:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:43:33,051 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-01-30 21:43:33,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:43:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-01-30 21:43:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-30 21:43:33,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:43:33,052 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:43:33,071 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 21:43:33,263 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 21:43:33,267 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:43:33,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:43:33,267 INFO L85 PathProgramCache]: Analyzing trace with hash 708308208, now seen corresponding path program 3 times [2022-01-30 21:43:33,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:43:33,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801526686] [2022-01-30 21:43:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:43:33,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:43:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:33,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:43:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:43:33,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:43:33,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801526686] [2022-01-30 21:43:33,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801526686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:43:33,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346308896] [2022-01-30 21:43:33,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:43:33,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:43:33,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:43:33,429 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 21:43:33,430 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 21:43:33,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-30 21:43:33,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:43:33,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 21:43:33,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:43:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:43:33,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:43:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:43:33,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346308896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:43:33,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:43:33,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-30 21:43:33,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535708339] [2022-01-30 21:43:33,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:43:33,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 21:43:33,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:43:33,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 21:43:33,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-30 21:43:33,753 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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 21:43:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:43:34,318 INFO L93 Difference]: Finished difference Result 205 states and 262 transitions. [2022-01-30 21:43:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 21:43:34,318 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-30 21:43:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:43:34,320 INFO L225 Difference]: With dead ends: 205 [2022-01-30 21:43:34,320 INFO L226 Difference]: Without dead ends: 169 [2022-01-30 21:43:34,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-30 21:43:34,322 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 325 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 21:43:34,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 32 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 21:43:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-30 21:43:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 117. [2022-01-30 21:43:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-30 21:43:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2022-01-30 21:43:34,339 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 33 [2022-01-30 21:43:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:43:34,339 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2022-01-30 21:43:34,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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 21:43:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2022-01-30 21:43:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-30 21:43:34,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:43:34,341 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:43:34,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 21:43:34,563 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 21:43:34,564 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:43:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:43:34,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1447374760, now seen corresponding path program 4 times [2022-01-30 21:43:34,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:43:34,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777373446] [2022-01-30 21:43:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:43:34,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:43:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:34,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:43:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:43:34,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:43:34,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777373446] [2022-01-30 21:43:34,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777373446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:43:34,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159379893] [2022-01-30 21:43:34,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 21:43:34,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:43:34,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:43:34,884 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 21:43:34,886 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 21:43:34,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 21:43:34,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:43:34,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 21:43:34,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:43:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:43:35,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:43:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:43:35,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159379893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:43:35,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:43:35,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-30 21:43:35,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887416257] [2022-01-30 21:43:35,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:43:35,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 21:43:35,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:43:35,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 21:43:35,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 21:43:35,708 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 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 21:43:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:43:37,110 INFO L93 Difference]: Finished difference Result 403 states and 520 transitions. [2022-01-30 21:43:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-30 21:43:37,111 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 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 57 [2022-01-30 21:43:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:43:37,113 INFO L225 Difference]: With dead ends: 403 [2022-01-30 21:43:37,113 INFO L226 Difference]: Without dead ends: 337 [2022-01-30 21:43:37,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-30 21:43:37,115 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 770 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 21:43:37,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 37 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-30 21:43:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-30 21:43:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 225. [2022-01-30 21:43:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 26 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-30 21:43:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 250 transitions. [2022-01-30 21:43:37,136 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 250 transitions. Word has length 57 [2022-01-30 21:43:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:43:37,136 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 250 transitions. [2022-01-30 21:43:37,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 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 21:43:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 250 transitions. [2022-01-30 21:43:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-30 21:43:37,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:43:37,137 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:43:37,162 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 21:43:37,348 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 21:43:37,348 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:43:37,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:43:37,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1377529640, now seen corresponding path program 5 times [2022-01-30 21:43:37,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:43:37,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922977997] [2022-01-30 21:43:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:43:37,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:43:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:38,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:43:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:43:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:43:38,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:43:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922977997] [2022-01-30 21:43:38,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922977997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:43:38,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161825558] [2022-01-30 21:43:38,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 21:43:38,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:43:38,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:43:38,154 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 21:43:38,155 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 21:44:10,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-30 21:44:10,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:44:10,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-30 21:44:10,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:44:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:10,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:44:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:12,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161825558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:44:12,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:44:12,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-01-30 21:44:12,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693390811] [2022-01-30 21:44:12,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:44:12,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-30 21:44:12,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:44:12,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-30 21:44:12,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-30 21:44:12,468 INFO L87 Difference]: Start difference. First operand 225 states and 250 transitions. Second operand has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 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 21:44:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:44:17,056 INFO L93 Difference]: Finished difference Result 799 states and 1036 transitions. [2022-01-30 21:44:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-30 21:44:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 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 105 [2022-01-30 21:44:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:44:17,061 INFO L225 Difference]: With dead ends: 799 [2022-01-30 21:44:17,061 INFO L226 Difference]: Without dead ends: 673 [2022-01-30 21:44:17,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2022-01-30 21:44:17,069 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1458 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 1176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1176 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:44:17,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1458 Valid, 57 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1176 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-30 21:44:17,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-30 21:44:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 441. [2022-01-30 21:44:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 388 states have (on average 1.0077319587628866) internal successors, (391), 388 states have internal predecessors, (391), 50 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-30 21:44:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 490 transitions. [2022-01-30 21:44:17,125 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 490 transitions. Word has length 105 [2022-01-30 21:44:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:44:17,126 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 490 transitions. [2022-01-30 21:44:17,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 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 21:44:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 490 transitions. [2022-01-30 21:44:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-30 21:44:17,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:44:17,128 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:44:17,162 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 21:44:17,347 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 21:44:17,348 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:44:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:44:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1185418440, now seen corresponding path program 6 times [2022-01-30 21:44:17,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:44:17,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61999523] [2022-01-30 21:44:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:44:17,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:44:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:19,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:44:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:19,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:44:19,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61999523] [2022-01-30 21:44:19,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61999523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:44:19,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064525565] [2022-01-30 21:44:19,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 21:44:19,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:44:19,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:44:19,902 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 21:44:19,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process