/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:18:55,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:18:55,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:18:55,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 23:18:55,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:18:55,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:18:55,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:18:55,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:18:55,891 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:18:55,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:18:55,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:18:55,891 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:18:55,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:18:55,892 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:18:55,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:18:55,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:18:55,893 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:18:55,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:18:55,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:18:55,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:18:55,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:18:55,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:18:55,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:18:55,893 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:18:55,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:18:55,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:18:55,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:18:55,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:18:55,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:18:55,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:18:55,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:18:55,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:18:55,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:18:55,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:18:55,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:18:55,895 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:18:55,895 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:18:55,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:18:55,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:18:56,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:18:56,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:18:56,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:18:56,064 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:18:56,064 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:18:56,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1.c [2022-01-09 23:18:56,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2216d43e8/cfb127133e52495a88df31c668ca0a38/FLAG5417f0296 [2022-01-09 23:18:56,484 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:18:56,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs1.c [2022-01-09 23:18:56,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2216d43e8/cfb127133e52495a88df31c668ca0a38/FLAG5417f0296 [2022-01-09 23:18:56,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2216d43e8/cfb127133e52495a88df31c668ca0a38 [2022-01-09 23:18:56,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:18:56,864 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:18:56,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:18:56,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:18:56,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:18:56,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:18:56" (1/1) ... [2022-01-09 23:18:56,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44bfb5a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:56, skipping insertion in model container [2022-01-09 23:18:56,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:18:56" (1/1) ... [2022-01-09 23:18:56,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:18:56,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:18:57,053 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-fpi/brs1.c[587,600] [2022-01-09 23:18:57,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:18:57,112 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:18:57,124 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-fpi/brs1.c[587,600] [2022-01-09 23:18:57,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:18:57,148 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:18:57,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57 WrapperNode [2022-01-09 23:18:57,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:18:57,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:18:57,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:18:57,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:18:57,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57" (1/1) ... [2022-01-09 23:18:57,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57" (1/1) ... [2022-01-09 23:18:57,179 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-01-09 23:18:57,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:18:57,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:18:57,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:18:57,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:18:57,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57" (1/1) ... [2022-01-09 23:18:57,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57" (1/1) ... [2022-01-09 23:18:57,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57" (1/1) ... [2022-01-09 23:18:57,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57" (1/1) ... [2022-01-09 23:18:57,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57" (1/1) ... [2022-01-09 23:18:57,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57" (1/1) ... [2022-01-09 23:18:57,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57" (1/1) ... [2022-01-09 23:18:57,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:18:57,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:18:57,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:18:57,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:18:57,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57" (1/1) ... [2022-01-09 23:18:57,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:18:57,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:18:57,228 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) [2022-01-09 23:18:57,245 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 [2022-01-09 23:18:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:18:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:18:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 23:18:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:18:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-09 23:18:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:18:57,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:18:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:18:57,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 23:18:57,301 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:18:57,302 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:18:57,395 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:18:57,399 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:18:57,399 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-09 23:18:57,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:18:57 BoogieIcfgContainer [2022-01-09 23:18:57,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:18:57,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:18:57,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:18:57,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:18:57,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:18:56" (1/3) ... [2022-01-09 23:18:57,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba9c79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:18:57, skipping insertion in model container [2022-01-09 23:18:57,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:18:57" (2/3) ... [2022-01-09 23:18:57,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba9c79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:18:57, skipping insertion in model container [2022-01-09 23:18:57,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:18:57" (3/3) ... [2022-01-09 23:18:57,406 INFO L111 eAbstractionObserver]: Analyzing ICFG brs1.c [2022-01-09 23:18:57,409 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:18:57,409 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:18:57,459 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:18:57,478 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 [2022-01-09 23:18:57,479 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:18:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:57,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-09 23:18:57,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:18:57,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:18:57,501 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:18:57,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:18:57,505 INFO L85 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2022-01-09 23:18:57,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:18:57,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290784398] [2022-01-09 23:18:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:18:57,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:18:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:18:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:18:57,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:18:57,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290784398] [2022-01-09 23:18:57,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290784398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:18:57,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:18:57,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:18:57,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173931750] [2022-01-09 23:18:57,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:18:57,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 23:18:57,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:18:57,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 23:18:57,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:18:57,685 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:18:57,696 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-01-09 23:18:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 23:18:57,698 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-09 23:18:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:18:57,703 INFO L225 Difference]: With dead ends: 36 [2022-01-09 23:18:57,703 INFO L226 Difference]: Without dead ends: 16 [2022-01-09 23:18:57,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:18:57,709 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:18:57,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:18:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-09 23:18:57,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-09 23:18:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-09 23:18:57,735 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2022-01-09 23:18:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:18:57,736 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-09 23:18:57,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-09 23:18:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-09 23:18:57,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:18:57,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:18:57,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:18:57,737 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:18:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:18:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2022-01-09 23:18:57,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:18:57,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936399322] [2022-01-09 23:18:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:18:57,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:18:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:18:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:18:57,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:18:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936399322] [2022-01-09 23:18:57,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936399322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:18:57,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:18:57,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 23:18:57,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210537590] [2022-01-09 23:18:57,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:18:57,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:18:57,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:18:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:18:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:18:57,850 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:57,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:18:57,893 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-01-09 23:18:57,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:18:57,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-09 23:18:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:18:57,894 INFO L225 Difference]: With dead ends: 30 [2022-01-09 23:18:57,894 INFO L226 Difference]: Without dead ends: 22 [2022-01-09 23:18:57,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:18:57,898 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:18:57,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:18:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-09 23:18:57,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-01-09 23:18:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-09 23:18:57,907 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2022-01-09 23:18:57,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:18:57,908 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-09 23:18:57,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-09 23:18:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 23:18:57,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:18:57,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:18:57,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:18:57,909 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:18:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:18:57,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2022-01-09 23:18:57,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:18:57,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936395095] [2022-01-09 23:18:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:18:57,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:18:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:18:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:18:57,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:18:57,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936395095] [2022-01-09 23:18:57,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936395095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:18:57,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:18:57,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 23:18:57,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421524051] [2022-01-09 23:18:57,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:18:57,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 23:18:57,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:18:57,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 23:18:57,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:18:57,983 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:18:58,032 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-01-09 23:18:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 23:18:58,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-09 23:18:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:18:58,034 INFO L225 Difference]: With dead ends: 26 [2022-01-09 23:18:58,034 INFO L226 Difference]: Without dead ends: 22 [2022-01-09 23:18:58,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:18:58,040 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:18:58,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 27 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:18:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-09 23:18:58,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-01-09 23:18:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-09 23:18:58,047 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-01-09 23:18:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:18:58,047 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-09 23:18:58,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-09 23:18:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-09 23:18:58,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:18:58,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:18:58,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 23:18:58,049 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:18:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:18:58,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2022-01-09 23:18:58,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:18:58,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983006393] [2022-01-09 23:18:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:18:58,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:18:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:18:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:18:58,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:18:58,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983006393] [2022-01-09 23:18:58,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983006393] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:18:58,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411926392] [2022-01-09 23:18:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:18:58,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:18:58,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:18:58,127 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) [2022-01-09 23:18:58,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:18:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:18:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:18:58,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:18:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:18:58,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:18:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:18:58,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411926392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:18:58,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:18:58,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-09 23:18:58,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205537301] [2022-01-09 23:18:58,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:18:58,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-09 23:18:58,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:18:58,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-09 23:18:58,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-09 23:18:58,421 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:18:58,499 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-01-09 23:18:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 23:18:58,499 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-09 23:18:58,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:18:58,500 INFO L225 Difference]: With dead ends: 42 [2022-01-09 23:18:58,500 INFO L226 Difference]: Without dead ends: 28 [2022-01-09 23:18:58,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-01-09 23:18:58,501 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:18:58,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 21 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:18:58,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-09 23:18:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-01-09 23:18:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-09 23:18:58,504 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2022-01-09 23:18:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:18:58,504 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-09 23:18:58,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:18:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-09 23:18:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-09 23:18:58,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:18:58,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:18:58,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:18:58,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:18:58,739 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:18:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:18:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1179965024, now seen corresponding path program 2 times [2022-01-09 23:18:58,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:18:58,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200023331] [2022-01-09 23:18:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:18:58,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:18:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:18:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:18:59,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:18:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200023331] [2022-01-09 23:18:59,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200023331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:18:59,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941860628] [2022-01-09 23:18:59,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:18:59,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:18:59,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:18:59,104 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) [2022-01-09 23:18:59,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:18:59,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:18:59,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:18:59,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-09 23:18:59,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:18:59,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-09 23:18:59,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:18:59,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-09 23:18:59,473 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-09 23:18:59,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-01-09 23:18:59,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:18:59,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2022-01-09 23:18:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:18:59,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:00,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 222 [2022-01-09 23:19:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:00,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941860628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:00,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:00,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 33 [2022-01-09 23:19:00,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207656989] [2022-01-09 23:19:00,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:00,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-09 23:19:00,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:00,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-09 23:19:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2022-01-09 23:19:00,377 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:00,749 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-01-09 23:19:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-09 23:19:00,750 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-09 23:19:00,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:00,751 INFO L225 Difference]: With dead ends: 60 [2022-01-09 23:19:00,751 INFO L226 Difference]: Without dead ends: 48 [2022-01-09 23:19:00,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892 [2022-01-09 23:19:00,752 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:00,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 53 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 147 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2022-01-09 23:19:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-09 23:19:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-01-09 23:19:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-01-09 23:19:00,757 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 23 [2022-01-09 23:19:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:00,758 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-01-09 23:19:00,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-01-09 23:19:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-09 23:19:00,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:00,758 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:00,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:00,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:00,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:00,976 INFO L85 PathProgramCache]: Analyzing trace with hash -179575874, now seen corresponding path program 3 times [2022-01-09 23:19:00,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:00,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112899314] [2022-01-09 23:19:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:00,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-09 23:19:01,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:01,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112899314] [2022-01-09 23:19:01,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112899314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:01,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333952862] [2022-01-09 23:19:01,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:19:01,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:01,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:01,032 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) [2022-01-09 23:19:01,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:19:01,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-09 23:19:01,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-09 23:19:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:01,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:01,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333952862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:01,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:01,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 19 [2022-01-09 23:19:01,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781906585] [2022-01-09 23:19:01,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:01,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-09 23:19:01,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-09 23:19:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-01-09 23:19:01,290 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:01,552 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-01-09 23:19:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-09 23:19:01,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-09 23:19:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:01,553 INFO L225 Difference]: With dead ends: 77 [2022-01-09 23:19:01,553 INFO L226 Difference]: Without dead ends: 59 [2022-01-09 23:19:01,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2022-01-09 23:19:01,554 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 115 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:01,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 49 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:19:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-09 23:19:01,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2022-01-09 23:19:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-01-09 23:19:01,559 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 29 [2022-01-09 23:19:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:01,559 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-01-09 23:19:01,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:01,559 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-01-09 23:19:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-09 23:19:01,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:01,560 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:01,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:01,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:01,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:01,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:01,776 INFO L85 PathProgramCache]: Analyzing trace with hash -690020773, now seen corresponding path program 4 times [2022-01-09 23:19:01,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:01,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649815203] [2022-01-09 23:19:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:01,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:02,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:02,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649815203] [2022-01-09 23:19:02,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649815203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:02,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475424710] [2022-01-09 23:19:02,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:19:02,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:02,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:02,362 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) [2022-01-09 23:19:02,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:19:02,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:19:02,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-09 23:19:02,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:02,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:19:02,569 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-09 23:19:02,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-09 23:19:02,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:02,696 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-09 23:19:02,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-09 23:19:02,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:02,821 INFO L353 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-01-09 23:19:02,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 51 [2022-01-09 23:19:02,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:02,950 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-09 23:19:02,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-01-09 23:19:03,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:03,153 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-09 23:19:03,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 15 [2022-01-09 23:19:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:03,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:11,870 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_150 Int) (v_ArrVal_149 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_146)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_150 (+ v_ArrVal_149 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_149)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_146 1)) (not (<= v_ArrVal_149 0)) (<= (+ v_ArrVal_150 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_150)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ |c_ULTIMATE.start_main_~i~0#1| 1)))))) is different from false [2022-01-09 23:19:13,517 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_150 Int) (v_ArrVal_149 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_146)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_150 (+ v_ArrVal_149 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_149)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_146 1)) (not (<= v_ArrVal_149 0)) (<= (+ v_ArrVal_150 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_150)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ 2 |c_ULTIMATE.start_main_~i~0#1|)))))) is different from false [2022-01-09 23:19:13,537 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-09 23:19:13,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2128 treesize of output 2074 [2022-01-09 23:19:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-01-09 23:19:14,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475424710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:14,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:14,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 43 [2022-01-09 23:19:14,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848880423] [2022-01-09 23:19:14,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:14,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-09 23:19:14,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:14,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-09 23:19:14,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1448, Unknown=6, NotChecked=158, Total=1806 [2022-01-09 23:19:14,811 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:15,659 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-01-09 23:19:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-09 23:19:15,660 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-09 23:19:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:15,660 INFO L225 Difference]: With dead ends: 54 [2022-01-09 23:19:15,660 INFO L226 Difference]: Without dead ends: 37 [2022-01-09 23:19:15,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=404, Invalid=2904, Unknown=6, NotChecked=226, Total=3540 [2022-01-09 23:19:15,662 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:15,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 83 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 249 Invalid, 0 Unknown, 223 Unchecked, 0.1s Time] [2022-01-09 23:19:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-09 23:19:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-09 23:19:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-09 23:19:15,666 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2022-01-09 23:19:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:15,666 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-09 23:19:15,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-09 23:19:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-09 23:19:15,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:15,667 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:15,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:15,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:15,867 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:15,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1277658368, now seen corresponding path program 5 times [2022-01-09 23:19:15,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:15,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062029545] [2022-01-09 23:19:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:15,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:16,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062029545] [2022-01-09 23:19:16,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062029545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228289430] [2022-01-09 23:19:16,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:19:16,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:16,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:16,557 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) [2022-01-09 23:19:16,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 23:19:16,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-09 23:19:16,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:16,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-09 23:19:16,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:16,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-09 23:19:16,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:19:16,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:16,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-09 23:19:16,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:16,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:16,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:16,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-01-09 23:19:16,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:16,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:16,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:16,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-01-09 23:19:17,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:19:17,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:17,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:17,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:17,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 53 [2022-01-09 23:19:17,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:17,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:19:17,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:17,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 61 [2022-01-09 23:19:17,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:17,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:17,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:19:17,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 50 [2022-01-09 23:19:17,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:17,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:17,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2022-01-09 23:19:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:17,548 INFO L328 TraceCheckSpWp]: Computing backward predicates...