/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-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:02:16,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:02:16,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:02:16,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 23:02:16,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:02:16,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:02:16,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:02:16,351 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 23:02:16,369 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:02:16,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:02:16,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:02:16,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:02:16,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:02:16,371 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:02:16,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:02:16,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:02:16,372 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:02:16,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:02:16,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:02:16,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:02:16,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:02:16,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:02:16,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:02:16,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:02:16,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:02:16,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:02:16,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:02:16,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:02:16,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:02:16,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:02:16,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:02:16,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:02:16,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:02:16,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:02:16,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:02:16,374 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:02:16,374 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:02:16,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:02:16,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:02:16,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:02:16,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:02:16,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:02:16,651 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:02:16,655 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:02:16,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-01-09 23:02:16,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6258b64e5/4d530642d8af4fe0b938cb16344f4ea7/FLAG2a18614e4 [2022-01-09 23:02:17,166 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:02:17,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-01-09 23:02:17,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6258b64e5/4d530642d8af4fe0b938cb16344f4ea7/FLAG2a18614e4 [2022-01-09 23:02:17,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6258b64e5/4d530642d8af4fe0b938cb16344f4ea7 [2022-01-09 23:02:17,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:02:17,211 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:02:17,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:02:17,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:02:17,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:02:17,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43546438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17, skipping insertion in model container [2022-01-09 23:02:17,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:02:17,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:02:17,374 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-01-09 23:02:17,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:02:17,405 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:02:17,415 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-01-09 23:02:17,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:02:17,437 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:02:17,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17 WrapperNode [2022-01-09 23:02:17,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:02:17,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:02:17,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:02:17,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:02:17,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,468 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2022-01-09 23:02:17,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:02:17,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:02:17,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:02:17,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:02:17,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:02:17,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:02:17,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:02:17,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:02:17,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17" (1/1) ... [2022-01-09 23:02:17,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:02:17,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:17,537 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 23:02:17,547 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 23:02:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:02:17,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:02:17,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 23:02:17,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:02:17,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:02:17,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:02:17,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:02:17,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 23:02:17,673 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:02:17,674 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:02:17,915 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:02:17,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:02:17,921 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-09 23:02:17,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:02:17 BoogieIcfgContainer [2022-01-09 23:02:17,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:02:17,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:02:17,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:02:17,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:02:17,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:02:17" (1/3) ... [2022-01-09 23:02:17,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710ccc0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:02:17, skipping insertion in model container [2022-01-09 23:02:17,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:17" (2/3) ... [2022-01-09 23:02:17,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710ccc0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:02:17, skipping insertion in model container [2022-01-09 23:02:17,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:02:17" (3/3) ... [2022-01-09 23:02:17,938 INFO L111 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2022-01-09 23:02:17,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:02:17,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:02:18,001 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:02:18,010 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 23:02:18,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:02:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 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 23:02:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-09 23:02:18,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:18,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:18,045 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:18,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1525882359, now seen corresponding path program 1 times [2022-01-09 23:02:18,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:18,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773375090] [2022-01-09 23:02:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:18,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:18,279 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 23:02:18,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:18,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773375090] [2022-01-09 23:02:18,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773375090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:02:18,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:02:18,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:02:18,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168320990] [2022-01-09 23:02:18,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:02:18,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:02:18,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:02:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:02:18,314 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 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 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 23:02:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:18,376 INFO L93 Difference]: Finished difference Result 77 states and 118 transitions. [2022-01-09 23:02:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:02:18,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2022-01-09 23:02:18,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:18,385 INFO L225 Difference]: With dead ends: 77 [2022-01-09 23:02:18,385 INFO L226 Difference]: Without dead ends: 41 [2022-01-09 23:02:18,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 23:02:18,390 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:18,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-09 23:02:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2022-01-09 23:02:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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 23:02:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-01-09 23:02:18,418 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 12 [2022-01-09 23:02:18,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:18,418 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-01-09 23:02:18,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 23:02:18,419 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-01-09 23:02:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-09 23:02:18,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:18,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:18,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:02:18,420 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1053753351, now seen corresponding path program 1 times [2022-01-09 23:02:18,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:18,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905826227] [2022-01-09 23:02:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:18,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:02:18,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:18,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905826227] [2022-01-09 23:02:18,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905826227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:02:18,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:02:18,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:02:18,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121518568] [2022-01-09 23:02:18,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:02:18,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:02:18,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:18,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:02:18,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:02:18,478 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 23:02:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:18,511 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-01-09 23:02:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:02:18,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2022-01-09 23:02:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:18,513 INFO L225 Difference]: With dead ends: 52 [2022-01-09 23:02:18,513 INFO L226 Difference]: Without dead ends: 38 [2022-01-09 23:02:18,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 23:02:18,515 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:18,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 48 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:18,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-09 23:02:18,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-01-09 23:02:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 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 23:02:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-01-09 23:02:18,526 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 14 [2022-01-09 23:02:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:18,527 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-01-09 23:02:18,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 23:02:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-01-09 23:02:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-09 23:02:18,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:18,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:18,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:02:18,528 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:18,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1072948653, now seen corresponding path program 1 times [2022-01-09 23:02:18,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:18,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907875356] [2022-01-09 23:02:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:18,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:18,598 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 23:02:18,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:18,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907875356] [2022-01-09 23:02:18,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907875356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:02:18,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:02:18,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 23:02:18,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328042488] [2022-01-09 23:02:18,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:02:18,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:02:18,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:18,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:02:18,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:02:18,601 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 23:02:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:18,630 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2022-01-09 23:02:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 23:02:18,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 23:02:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:18,634 INFO L225 Difference]: With dead ends: 90 [2022-01-09 23:02:18,635 INFO L226 Difference]: Without dead ends: 67 [2022-01-09 23:02:18,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:02:18,637 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 72 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:18,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 96 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-09 23:02:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2022-01-09 23:02:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 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 23:02:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-01-09 23:02:18,645 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 20 [2022-01-09 23:02:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:18,646 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-01-09 23:02:18,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 23:02:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-01-09 23:02:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-09 23:02:18,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:18,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:18,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 23:02:18,647 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:18,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1602550877, now seen corresponding path program 1 times [2022-01-09 23:02:18,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:18,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199420760] [2022-01-09 23:02:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:18,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:18,700 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 23:02:18,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:18,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199420760] [2022-01-09 23:02:18,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199420760] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:02:18,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:02:18,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 23:02:18,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082427152] [2022-01-09 23:02:18,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:02:18,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:02:18,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:02:18,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:02:18,702 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 23:02:18,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:18,727 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2022-01-09 23:02:18,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:02:18,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 23:02:18,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:18,728 INFO L225 Difference]: With dead ends: 82 [2022-01-09 23:02:18,728 INFO L226 Difference]: Without dead ends: 53 [2022-01-09 23:02:18,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:02:18,730 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:18,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 103 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-09 23:02:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2022-01-09 23:02:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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 23:02:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-01-09 23:02:18,737 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2022-01-09 23:02:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:18,737 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-01-09 23:02:18,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 23:02:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-01-09 23:02:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-09 23:02:18,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:18,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:18,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-09 23:02:18,739 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:18,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:18,739 INFO L85 PathProgramCache]: Analyzing trace with hash -969039925, now seen corresponding path program 1 times [2022-01-09 23:02:18,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:18,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635305940] [2022-01-09 23:02:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:18,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 23:02:18,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:18,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635305940] [2022-01-09 23:02:18,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635305940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:02:18,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:02:18,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:02:18,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187009959] [2022-01-09 23:02:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:02:18,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:02:18,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:18,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:02:18,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:02:18,794 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 23:02:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:18,810 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-01-09 23:02:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:02:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) Word has length 21 [2022-01-09 23:02:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:18,811 INFO L225 Difference]: With dead ends: 46 [2022-01-09 23:02:18,812 INFO L226 Difference]: Without dead ends: 35 [2022-01-09 23:02:18,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:02:18,813 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:18,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:18,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-09 23:02:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-09 23:02:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 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 23:02:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-01-09 23:02:18,820 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 21 [2022-01-09 23:02:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:18,821 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-01-09 23:02:18,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 23:02:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-01-09 23:02:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-09 23:02:18,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:18,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:18,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-09 23:02:18,822 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1842211539, now seen corresponding path program 1 times [2022-01-09 23:02:18,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:18,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775013698] [2022-01-09 23:02:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:18,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 23:02:18,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:18,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775013698] [2022-01-09 23:02:18,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775013698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:18,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120562671] [2022-01-09 23:02:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:18,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:18,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:18,931 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 23:02:18,953 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 23:02:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:19,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:02:19,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 23:02:19,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 23:02:19,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120562671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:19,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:19,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-01-09 23:02:19,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426190462] [2022-01-09 23:02:19,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:19,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-09 23:02:19,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:19,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-09 23:02:19,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-09 23:02:19,307 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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 23:02:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:19,516 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2022-01-09 23:02:19,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-09 23:02:19,517 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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 25 [2022-01-09 23:02:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:19,521 INFO L225 Difference]: With dead ends: 141 [2022-01-09 23:02:19,522 INFO L226 Difference]: Without dead ends: 111 [2022-01-09 23:02:19,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2022-01-09 23:02:19,533 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 135 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:19,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 92 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-09 23:02:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 51. [2022-01-09 23:02:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 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 23:02:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-01-09 23:02:19,548 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2022-01-09 23:02:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:19,549 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-01-09 23:02:19,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 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 23:02:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-01-09 23:02:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-09 23:02:19,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:19,550 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:19,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-09 23:02:19,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-09 23:02:19,760 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 492833075, now seen corresponding path program 2 times [2022-01-09 23:02:19,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:19,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296489924] [2022-01-09 23:02:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:19,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-09 23:02:19,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:19,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296489924] [2022-01-09 23:02:19,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296489924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:02:19,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:02:19,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:02:19,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307436782] [2022-01-09 23:02:19,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:02:19,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:02:19,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:19,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:02:19,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:02:19,878 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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 23:02:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:19,897 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-01-09 23:02:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:02:19,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) Word has length 34 [2022-01-09 23:02:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:19,898 INFO L225 Difference]: With dead ends: 66 [2022-01-09 23:02:19,898 INFO L226 Difference]: Without dead ends: 51 [2022-01-09 23:02:19,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:02:19,901 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:19,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-09 23:02:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-09 23:02:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 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 23:02:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-01-09 23:02:19,912 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 34 [2022-01-09 23:02:19,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:19,913 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-01-09 23:02:19,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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 23:02:19,913 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-01-09 23:02:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-09 23:02:19,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:19,914 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:19,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-09 23:02:19,914 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:19,919 INFO L85 PathProgramCache]: Analyzing trace with hash 750998513, now seen corresponding path program 1 times [2022-01-09 23:02:19,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:19,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463906836] [2022-01-09 23:02:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:19,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:02:20,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463906836] [2022-01-09 23:02:20,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463906836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735964589] [2022-01-09 23:02:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:20,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:20,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:20,048 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 23:02:20,050 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 23:02:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:20,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 23:02:20,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:02:20,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:02:20,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735964589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:20,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:20,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-01-09 23:02:20,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363468276] [2022-01-09 23:02:20,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:20,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-09 23:02:20,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:20,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-09 23:02:20,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2022-01-09 23:02:20,397 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 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 23:02:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:20,644 INFO L93 Difference]: Finished difference Result 204 states and 234 transitions. [2022-01-09 23:02:20,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 23:02:20,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 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 34 [2022-01-09 23:02:20,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:20,646 INFO L225 Difference]: With dead ends: 204 [2022-01-09 23:02:20,646 INFO L226 Difference]: Without dead ends: 164 [2022-01-09 23:02:20,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2022-01-09 23:02:20,647 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:20,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 150 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-09 23:02:20,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 63. [2022-01-09 23:02:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 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 23:02:20,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-01-09 23:02:20,658 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 34 [2022-01-09 23:02:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:20,659 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-01-09 23:02:20,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 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 23:02:20,659 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-01-09 23:02:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-09 23:02:20,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:20,660 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:20,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-09 23:02:20,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-09 23:02:20,888 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:20,888 INFO L85 PathProgramCache]: Analyzing trace with hash -452665475, now seen corresponding path program 2 times [2022-01-09 23:02:20,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:20,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041251063] [2022-01-09 23:02:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:20,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:02:21,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:21,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041251063] [2022-01-09 23:02:21,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041251063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:21,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348702981] [2022-01-09 23:02:21,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:02:21,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:21,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:21,088 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 23:02:21,097 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 23:02:21,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:02:21,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:21,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-09 23:02:21,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:02:21,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:02:21,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348702981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:21,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:21,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-01-09 23:02:21,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046680930] [2022-01-09 23:02:21,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:21,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-09 23:02:21,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:21,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-09 23:02:21,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2022-01-09 23:02:21,721 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 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 23:02:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:22,267 INFO L93 Difference]: Finished difference Result 372 states and 420 transitions. [2022-01-09 23:02:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-09 23:02:22,268 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 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 46 [2022-01-09 23:02:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:22,270 INFO L225 Difference]: With dead ends: 372 [2022-01-09 23:02:22,270 INFO L226 Difference]: Without dead ends: 332 [2022-01-09 23:02:22,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2022-01-09 23:02:22,274 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1047 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:22,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1047 Valid, 203 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-09 23:02:22,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-09 23:02:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 87. [2022-01-09 23:02:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 86 states have internal predecessors, (95), 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 23:02:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2022-01-09 23:02:22,291 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 46 [2022-01-09 23:02:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:22,291 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2022-01-09 23:02:22,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 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 23:02:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2022-01-09 23:02:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-09 23:02:22,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:22,293 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:22,315 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 23:02:22,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:22,512 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:22,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:22,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1586487147, now seen corresponding path program 3 times [2022-01-09 23:02:22,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:22,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008829370] [2022-01-09 23:02:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:22,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:02:22,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:22,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008829370] [2022-01-09 23:02:22,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008829370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:22,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285118599] [2022-01-09 23:02:22,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:02:22,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:22,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:22,956 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 23:02:22,958 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 23:02:23,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-09 23:02:23,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:23,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:02:23,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-01-09 23:02:23,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-01-09 23:02:23,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285118599] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:23,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:23,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 30 [2022-01-09 23:02:23,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411413251] [2022-01-09 23:02:23,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:23,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-09 23:02:23,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-09 23:02:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:02:23,398 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 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 23:02:24,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:24,194 INFO L93 Difference]: Finished difference Result 427 states and 474 transitions. [2022-01-09 23:02:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-09 23:02:24,195 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 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 70 [2022-01-09 23:02:24,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:24,197 INFO L225 Difference]: With dead ends: 427 [2022-01-09 23:02:24,197 INFO L226 Difference]: Without dead ends: 387 [2022-01-09 23:02:24,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=935, Invalid=2035, Unknown=0, NotChecked=0, Total=2970 [2022-01-09 23:02:24,201 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 938 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:24,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 228 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-09 23:02:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-09 23:02:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 117. [2022-01-09 23:02:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 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 23:02:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2022-01-09 23:02:24,227 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 70 [2022-01-09 23:02:24,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:24,228 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2022-01-09 23:02:24,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 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 23:02:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2022-01-09 23:02:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-09 23:02:24,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:24,234 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:24,261 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 23:02:24,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:24,458 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1867228667, now seen corresponding path program 1 times [2022-01-09 23:02:24,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:24,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671785918] [2022-01-09 23:02:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:24,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-09 23:02:24,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:24,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671785918] [2022-01-09 23:02:24,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671785918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:24,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114651189] [2022-01-09 23:02:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:24,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:24,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:24,844 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 23:02:24,875 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 23:02:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-09 23:02:25,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-09 23:02:25,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-09 23:02:26,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114651189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:26,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:26,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 75 [2022-01-09 23:02:26,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493087886] [2022-01-09 23:02:26,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:26,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-09 23:02:26,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:26,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-09 23:02:26,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=3197, Unknown=0, NotChecked=0, Total=5700 [2022-01-09 23:02:26,529 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 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 23:02:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:28,537 INFO L93 Difference]: Finished difference Result 792 states and 891 transitions. [2022-01-09 23:02:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-09 23:02:28,537 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 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 90 [2022-01-09 23:02:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:28,540 INFO L225 Difference]: With dead ends: 792 [2022-01-09 23:02:28,540 INFO L226 Difference]: Without dead ends: 724 [2022-01-09 23:02:28,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3501 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3775, Invalid=6125, Unknown=0, NotChecked=0, Total=9900 [2022-01-09 23:02:28,544 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2397 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:28,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2397 Valid, 339 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:02:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-09 23:02:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 167. [2022-01-09 23:02:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 166 states have internal predecessors, (181), 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 23:02:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 181 transitions. [2022-01-09 23:02:28,562 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 181 transitions. Word has length 90 [2022-01-09 23:02:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:28,562 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 181 transitions. [2022-01-09 23:02:28,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 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 23:02:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 181 transitions. [2022-01-09 23:02:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-09 23:02:28,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:28,564 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:28,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 23:02:28,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-09 23:02:28,788 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash 838087341, now seen corresponding path program 2 times [2022-01-09 23:02:28,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466469549] [2022-01-09 23:02:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:28,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-09 23:02:29,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:29,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466469549] [2022-01-09 23:02:29,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466469549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:29,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879601696] [2022-01-09 23:02:29,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:02:29,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:29,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:29,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:29,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:02:30,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:02:30,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:30,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-09 23:02:30,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-09 23:02:31,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-09 23:02:34,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879601696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:34,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:34,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 150 [2022-01-09 23:02:34,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746700058] [2022-01-09 23:02:34,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:34,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-09 23:02:34,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:34,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-09 23:02:34,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10003, Invalid=12647, Unknown=0, NotChecked=0, Total=22650 [2022-01-09 23:02:34,270 INFO L87 Difference]: Start difference. First operand 167 states and 181 transitions. Second operand has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 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 23:02:42,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:42,460 INFO L93 Difference]: Finished difference Result 1492 states and 1666 transitions. [2022-01-09 23:02:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-09 23:02:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 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 140 [2022-01-09 23:02:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:42,469 INFO L225 Difference]: With dead ends: 1492 [2022-01-09 23:02:42,469 INFO L226 Difference]: Without dead ends: 1424 [2022-01-09 23:02:42,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14501 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=15050, Invalid=24750, Unknown=0, NotChecked=0, Total=39800 [2022-01-09 23:02:42,475 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 5085 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5085 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 2326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:42,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5085 Valid, 685 Invalid, 2326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-09 23:02:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-01-09 23:02:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 267. [2022-01-09 23:02:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.056390977443609) internal successors, (281), 266 states have internal predecessors, (281), 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 23:02:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 281 transitions. [2022-01-09 23:02:42,499 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 281 transitions. Word has length 140 [2022-01-09 23:02:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:42,500 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 281 transitions. [2022-01-09 23:02:42,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 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 23:02:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 281 transitions. [2022-01-09 23:02:42,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-01-09 23:02:42,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:42,502 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:42,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 23:02:42,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:42,720 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1802074769, now seen corresponding path program 3 times [2022-01-09 23:02:42,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:42,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003382156] [2022-01-09 23:02:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:42,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-09 23:02:46,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:46,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003382156] [2022-01-09 23:02:46,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003382156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:46,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993624018] [2022-01-09 23:02:46,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:02:46,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:46,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:46,630 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:46,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 23:02:46,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:02:46,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:46,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:02:46,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9641 trivial. 0 not checked. [2022-01-09 23:02:47,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9641 trivial. 0 not checked. [2022-01-09 23:02:47,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993624018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:47,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:47,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 108 [2022-01-09 23:02:47,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308223003] [2022-01-09 23:02:47,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:47,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-09 23:02:47,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:47,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-09 23:02:47,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5478, Invalid=6294, Unknown=0, NotChecked=0, Total=11772 [2022-01-09 23:02:47,916 INFO L87 Difference]: Start difference. First operand 267 states and 281 transitions. Second operand has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 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 23:03:16,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:16,441 INFO L93 Difference]: Finished difference Result 2964 states and 3197 transitions. [2022-01-09 23:03:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-01-09 23:03:16,442 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 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 240 [2022-01-09 23:03:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:16,452 INFO L225 Difference]: With dead ends: 2964 [2022-01-09 23:03:16,452 INFO L226 Difference]: Without dead ends: 2896 [2022-01-09 23:03:16,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46174 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=53146, Invalid=115364, Unknown=0, NotChecked=0, Total=168510 [2022-01-09 23:03:16,466 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 10858 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 3848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10858 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 5162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3848 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:16,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10858 Valid, 1021 Invalid, 5162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3848 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-09 23:03:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2022-01-09 23:03:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 770. [2022-01-09 23:03:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1495448634590377) internal successors, (884), 769 states have internal predecessors, (884), 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 23:03:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 884 transitions. [2022-01-09 23:03:16,758 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 884 transitions. Word has length 240 [2022-01-09 23:03:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:16,759 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 884 transitions. [2022-01-09 23:03:16,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 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 23:03:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 884 transitions. [2022-01-09 23:03:16,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-09 23:03:16,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:16,761 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:16,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:16,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:16,964 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:16,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1263380961, now seen corresponding path program 1 times [2022-01-09 23:03:16,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:16,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166617018] [2022-01-09 23:03:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:16,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat