/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/eca-rers2012/Problem03_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:30:36,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:30:36,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:30:36,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 23:30:36,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:30:36,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:30:36,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:30:36,657 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 23:30:36,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:30:36,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:30:36,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:30:36,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:30:36,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:30:36,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:30:36,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:30:36,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:30:36,682 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:30:36,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:30:36,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:30:36,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:30:36,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:30:36,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:30:36,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:30:36,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:30:36,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:30:36,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:30:36,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:30:36,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:30:36,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:30:36,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:30:36,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:30:36,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:30:36,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:30:36,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:30:36,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:30:36,685 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:30:36,685 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:30:36,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:30:36,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:30:36,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:30:36,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:30:36,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:30:36,860 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:30:36,862 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:30:36,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label25.c [2022-01-09 23:30:36,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543f98f71/e5a8afa1a5424acbac7d2f69a4f1ca1c/FLAG25957a3e8 [2022-01-09 23:30:37,347 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:30:37,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label25.c [2022-01-09 23:30:37,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543f98f71/e5a8afa1a5424acbac7d2f69a4f1ca1c/FLAG25957a3e8 [2022-01-09 23:30:37,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543f98f71/e5a8afa1a5424acbac7d2f69a4f1ca1c [2022-01-09 23:30:37,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:30:37,643 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:30:37,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:30:37,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:30:37,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:30:37,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:30:37" (1/1) ... [2022-01-09 23:30:37,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a7c15a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:37, skipping insertion in model container [2022-01-09 23:30:37,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:30:37" (1/1) ... [2022-01-09 23:30:37,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:30:37,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:30:38,046 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label25.c[58529,58542] [2022-01-09 23:30:38,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:30:38,082 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:30:38,278 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label25.c[58529,58542] [2022-01-09 23:30:38,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:30:38,299 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:30:38,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38 WrapperNode [2022-01-09 23:30:38,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:30:38,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:30:38,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:30:38,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:30:38,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38" (1/1) ... [2022-01-09 23:30:38,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38" (1/1) ... [2022-01-09 23:30:38,380 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-01-09 23:30:38,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:30:38,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:30:38,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:30:38,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:30:38,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38" (1/1) ... [2022-01-09 23:30:38,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38" (1/1) ... [2022-01-09 23:30:38,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38" (1/1) ... [2022-01-09 23:30:38,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38" (1/1) ... [2022-01-09 23:30:38,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38" (1/1) ... [2022-01-09 23:30:38,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38" (1/1) ... [2022-01-09 23:30:38,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38" (1/1) ... [2022-01-09 23:30:38,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:30:38,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:30:38,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:30:38,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:30:38,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38" (1/1) ... [2022-01-09 23:30:38,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:30:38,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:38,528 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 23:30:38,537 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 23:30:38,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:30:38,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:30:38,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:30:38,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:30:38,602 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:30:38,603 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:30:39,594 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:30:39,606 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:30:39,606 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 23:30:39,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:30:39 BoogieIcfgContainer [2022-01-09 23:30:39,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:30:39,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:30:39,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:30:39,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:30:39,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:30:37" (1/3) ... [2022-01-09 23:30:39,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650e7bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:30:39, skipping insertion in model container [2022-01-09 23:30:39,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:38" (2/3) ... [2022-01-09 23:30:39,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650e7bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:30:39, skipping insertion in model container [2022-01-09 23:30:39,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:30:39" (3/3) ... [2022-01-09 23:30:39,613 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label25.c [2022-01-09 23:30:39,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:30:39,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:30:39,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:30:39,653 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 23:30:39,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:30:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 23:30:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-09 23:30:39,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:39,677 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-01-09 23:30:39,677 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash 724714706, now seen corresponding path program 1 times [2022-01-09 23:30:39,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:39,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311403342] [2022-01-09 23:30:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:39,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:40,090 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 23:30:40,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:40,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311403342] [2022-01-09 23:30:40,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311403342] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:40,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:40,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:40,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019639311] [2022-01-09 23:30:40,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:40,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:40,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:40,119 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 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 23:30:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:40,992 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2022-01-09 23:30:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:40,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 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 180 [2022-01-09 23:30:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:41,024 INFO L225 Difference]: With dead ends: 836 [2022-01-09 23:30:41,024 INFO L226 Difference]: Without dead ends: 457 [2022-01-09 23:30:41,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 23:30:41,036 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 103 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:41,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 23:30:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-09 23:30:41,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2022-01-09 23:30:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 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 23:30:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2022-01-09 23:30:41,127 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 180 [2022-01-09 23:30:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:41,128 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2022-01-09 23:30:41,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 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 23:30:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2022-01-09 23:30:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-09 23:30:41,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:41,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:41,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:30:41,135 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:41,138 INFO L85 PathProgramCache]: Analyzing trace with hash -586354594, now seen corresponding path program 1 times [2022-01-09 23:30:41,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:41,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532855990] [2022-01-09 23:30:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:41,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:41,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:41,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532855990] [2022-01-09 23:30:41,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532855990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:41,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:41,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:41,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932728429] [2022-01-09 23:30:41,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:41,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:41,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:41,247 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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 23:30:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:41,817 INFO L93 Difference]: Finished difference Result 1340 states and 2142 transitions. [2022-01-09 23:30:41,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:41,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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 186 [2022-01-09 23:30:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:41,821 INFO L225 Difference]: With dead ends: 1340 [2022-01-09 23:30:41,821 INFO L226 Difference]: Without dead ends: 891 [2022-01-09 23:30:41,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 23:30:41,823 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:41,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 141 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:30:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-01-09 23:30:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 886. [2022-01-09 23:30:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.5785310734463276) internal successors, (1397), 885 states have internal predecessors, (1397), 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 23:30:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1397 transitions. [2022-01-09 23:30:41,839 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1397 transitions. Word has length 186 [2022-01-09 23:30:41,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:41,840 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1397 transitions. [2022-01-09 23:30:41,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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 23:30:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1397 transitions. [2022-01-09 23:30:41,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-09 23:30:41,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:41,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 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 23:30:41,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:30:41,844 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:41,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:41,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1559504468, now seen corresponding path program 1 times [2022-01-09 23:30:41,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:41,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259131594] [2022-01-09 23:30:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:41,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:41,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:41,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259131594] [2022-01-09 23:30:41,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259131594] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:41,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:41,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:41,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103619502] [2022-01-09 23:30:41,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:41,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:41,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:41,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:41,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:41,921 INFO L87 Difference]: Start difference. First operand 886 states and 1397 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 23:30:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:42,514 INFO L93 Difference]: Finished difference Result 2605 states and 4115 transitions. [2022-01-09 23:30:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:42,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 190 [2022-01-09 23:30:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:42,520 INFO L225 Difference]: With dead ends: 2605 [2022-01-09 23:30:42,520 INFO L226 Difference]: Without dead ends: 1721 [2022-01-09 23:30:42,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 23:30:42,522 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 232 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:42,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 126 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:30:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-01-09 23:30:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2022-01-09 23:30:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5005820721769498) internal successors, (2578), 1718 states have internal predecessors, (2578), 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 23:30:42,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2578 transitions. [2022-01-09 23:30:42,546 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2578 transitions. Word has length 190 [2022-01-09 23:30:42,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:42,546 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2578 transitions. [2022-01-09 23:30:42,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 23:30:42,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2578 transitions. [2022-01-09 23:30:42,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-09 23:30:42,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:42,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1] [2022-01-09 23:30:42,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 23:30:42,550 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:42,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:42,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1196520631, now seen corresponding path program 1 times [2022-01-09 23:30:42,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:42,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637014366] [2022-01-09 23:30:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:42,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:42,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:42,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637014366] [2022-01-09 23:30:42,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637014366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:42,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:42,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:30:42,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110224355] [2022-01-09 23:30:42,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:42,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:42,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:42,602 INFO L87 Difference]: Start difference. First operand 1719 states and 2578 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 23:30:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:43,172 INFO L93 Difference]: Finished difference Result 5080 states and 7623 transitions. [2022-01-09 23:30:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:43,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 193 [2022-01-09 23:30:43,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:43,183 INFO L225 Difference]: With dead ends: 5080 [2022-01-09 23:30:43,183 INFO L226 Difference]: Without dead ends: 3363 [2022-01-09 23:30:43,185 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 23:30:43,188 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 254 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:43,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 179 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:30:43,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2022-01-09 23:30:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3361. [2022-01-09 23:30:43,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 1.4321428571428572) internal successors, (4812), 3360 states have internal predecessors, (4812), 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 23:30:43,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 4812 transitions. [2022-01-09 23:30:43,239 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 4812 transitions. Word has length 193 [2022-01-09 23:30:43,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:43,239 INFO L470 AbstractCegarLoop]: Abstraction has 3361 states and 4812 transitions. [2022-01-09 23:30:43,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 23:30:43,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 4812 transitions. [2022-01-09 23:30:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-09 23:30:43,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:43,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:43,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-09 23:30:43,245 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:43,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1347155746, now seen corresponding path program 1 times [2022-01-09 23:30:43,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:43,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424824213] [2022-01-09 23:30:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:43,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:43,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:43,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424824213] [2022-01-09 23:30:43,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424824213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:43,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:43,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:43,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80445638] [2022-01-09 23:30:43,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:43,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:43,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:43,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:43,308 INFO L87 Difference]: Start difference. First operand 3361 states and 4812 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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 23:30:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:43,855 INFO L93 Difference]: Finished difference Result 9995 states and 14319 transitions. [2022-01-09 23:30:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:43,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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 194 [2022-01-09 23:30:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:43,872 INFO L225 Difference]: With dead ends: 9995 [2022-01-09 23:30:43,872 INFO L226 Difference]: Without dead ends: 6636 [2022-01-09 23:30:43,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 23:30:43,877 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 242 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:43,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 173 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:30:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6636 states. [2022-01-09 23:30:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6636 to 6630. [2022-01-09 23:30:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6630 states, 6629 states have (on average 1.368381354653794) internal successors, (9071), 6629 states have internal predecessors, (9071), 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 23:30:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6630 states to 6630 states and 9071 transitions. [2022-01-09 23:30:43,966 INFO L78 Accepts]: Start accepts. Automaton has 6630 states and 9071 transitions. Word has length 194 [2022-01-09 23:30:43,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:43,967 INFO L470 AbstractCegarLoop]: Abstraction has 6630 states and 9071 transitions. [2022-01-09 23:30:43,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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 23:30:43,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6630 states and 9071 transitions. [2022-01-09 23:30:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-09 23:30:43,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:43,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:43,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-09 23:30:43,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:43,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:43,976 INFO L85 PathProgramCache]: Analyzing trace with hash -130752193, now seen corresponding path program 1 times [2022-01-09 23:30:43,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:43,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061678569] [2022-01-09 23:30:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:43,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:44,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:44,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061678569] [2022-01-09 23:30:44,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061678569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:44,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:44,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:44,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943598099] [2022-01-09 23:30:44,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:44,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:44,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:44,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:44,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:44,028 INFO L87 Difference]: Start difference. First operand 6630 states and 9071 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 23:30:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:44,657 INFO L93 Difference]: Finished difference Result 17747 states and 24321 transitions. [2022-01-09 23:30:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:44,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 199 [2022-01-09 23:30:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:44,686 INFO L225 Difference]: With dead ends: 17747 [2022-01-09 23:30:44,687 INFO L226 Difference]: Without dead ends: 11119 [2022-01-09 23:30:44,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 23:30:44,696 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 208 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:44,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 171 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:30:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2022-01-09 23:30:44,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 11096. [2022-01-09 23:30:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11096 states, 11095 states have (on average 1.320865254619198) internal successors, (14655), 11095 states have internal predecessors, (14655), 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 23:30:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 14655 transitions. [2022-01-09 23:30:44,844 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 14655 transitions. Word has length 199 [2022-01-09 23:30:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:44,844 INFO L470 AbstractCegarLoop]: Abstraction has 11096 states and 14655 transitions. [2022-01-09 23:30:44,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 23:30:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 14655 transitions. [2022-01-09 23:30:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-09 23:30:44,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:44,857 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 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 23:30:44,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-09 23:30:44,857 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1681277464, now seen corresponding path program 1 times [2022-01-09 23:30:44,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:44,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346398933] [2022-01-09 23:30:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:44,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:44,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:44,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346398933] [2022-01-09 23:30:44,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346398933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:44,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370334174] [2022-01-09 23:30:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:44,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:44,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:44,952 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 23:30:44,955 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 23:30:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:45,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:30:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:30:45,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:30:45,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370334174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:45,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:30:45,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-01-09 23:30:45,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155054978] [2022-01-09 23:30:45,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:45,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:45,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:45,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:45,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:45,441 INFO L87 Difference]: Start difference. First operand 11096 states and 14655 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 23:30:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:46,168 INFO L93 Difference]: Finished difference Result 29906 states and 39731 transitions. [2022-01-09 23:30:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:46,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 204 [2022-01-09 23:30:46,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:46,200 INFO L225 Difference]: With dead ends: 29906 [2022-01-09 23:30:46,201 INFO L226 Difference]: Without dead ends: 19015 [2022-01-09 23:30:46,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:46,214 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 230 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:46,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 413 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:30:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19015 states. [2022-01-09 23:30:46,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19015 to 19011. [2022-01-09 23:30:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19011 states, 19010 states have (on average 1.2027880063124672) internal successors, (22865), 19010 states have internal predecessors, (22865), 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 23:30:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19011 states to 19011 states and 22865 transitions. [2022-01-09 23:30:46,525 INFO L78 Accepts]: Start accepts. Automaton has 19011 states and 22865 transitions. Word has length 204 [2022-01-09 23:30:46,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:46,525 INFO L470 AbstractCegarLoop]: Abstraction has 19011 states and 22865 transitions. [2022-01-09 23:30:46,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 23:30:46,526 INFO L276 IsEmpty]: Start isEmpty. Operand 19011 states and 22865 transitions. [2022-01-09 23:30:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-09 23:30:46,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:46,543 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:46,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:30:46,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:46,760 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:46,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1944740812, now seen corresponding path program 1 times [2022-01-09 23:30:46,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:46,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513165258] [2022-01-09 23:30:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:46,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:46,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513165258] [2022-01-09 23:30:46,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513165258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81992645] [2022-01-09 23:30:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:46,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:46,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:46,836 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 23:30:46,851 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 23:30:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:46,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:30:46,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:30:47,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:30:47,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81992645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:47,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:30:47,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-01-09 23:30:47,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824715087] [2022-01-09 23:30:47,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:47,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:47,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:47,241 INFO L87 Difference]: Start difference. First operand 19011 states and 22865 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 23:30:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:48,012 INFO L93 Difference]: Finished difference Result 42894 states and 52535 transitions. [2022-01-09 23:30:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:48,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 206 [2022-01-09 23:30:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:48,078 INFO L225 Difference]: With dead ends: 42894 [2022-01-09 23:30:48,078 INFO L226 Difference]: Without dead ends: 24088 [2022-01-09 23:30:48,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:48,107 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 223 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:48,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 170 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:30:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24088 states. [2022-01-09 23:30:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24088 to 24084. [2022-01-09 23:30:48,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24084 states, 24083 states have (on average 1.1824523522816925) internal successors, (28477), 24083 states have internal predecessors, (28477), 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 23:30:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24084 states to 24084 states and 28477 transitions. [2022-01-09 23:30:48,533 INFO L78 Accepts]: Start accepts. Automaton has 24084 states and 28477 transitions. Word has length 206 [2022-01-09 23:30:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:48,533 INFO L470 AbstractCegarLoop]: Abstraction has 24084 states and 28477 transitions. [2022-01-09 23:30:48,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 23:30:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24084 states and 28477 transitions. [2022-01-09 23:30:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-09 23:30:48,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:48,556 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:48,589 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 23:30:48,790 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 23:30:48,791 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash 885807587, now seen corresponding path program 1 times [2022-01-09 23:30:48,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:48,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989320448] [2022-01-09 23:30:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:48,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:48,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:48,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989320448] [2022-01-09 23:30:48,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989320448] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:48,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115169318] [2022-01-09 23:30:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:48,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:48,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:48,934 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 23:30:48,950 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 23:30:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:49,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:30:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-09 23:30:49,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:30:49,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115169318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:49,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:30:49,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-01-09 23:30:49,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192489866] [2022-01-09 23:30:49,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:49,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:49,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:49,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:49,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:49,442 INFO L87 Difference]: Start difference. First operand 24084 states and 28477 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 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 23:30:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:50,158 INFO L93 Difference]: Finished difference Result 58778 states and 70029 transitions. [2022-01-09 23:30:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:50,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 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 215 [2022-01-09 23:30:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:50,203 INFO L225 Difference]: With dead ends: 58778 [2022-01-09 23:30:50,203 INFO L226 Difference]: Without dead ends: 35102 [2022-01-09 23:30:50,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:50,226 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 89 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:50,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 181 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:30:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35102 states. [2022-01-09 23:30:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35102 to 35086. [2022-01-09 23:30:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35086 states, 35085 states have (on average 1.1760866467151205) internal successors, (41263), 35085 states have internal predecessors, (41263), 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 23:30:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35086 states to 35086 states and 41263 transitions. [2022-01-09 23:30:50,761 INFO L78 Accepts]: Start accepts. Automaton has 35086 states and 41263 transitions. Word has length 215 [2022-01-09 23:30:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:50,762 INFO L470 AbstractCegarLoop]: Abstraction has 35086 states and 41263 transitions. [2022-01-09 23:30:50,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 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 23:30:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 35086 states and 41263 transitions. [2022-01-09 23:30:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-09 23:30:50,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:50,790 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:50,820 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 23:30:51,004 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 23:30:51,004 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:51,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:51,005 INFO L85 PathProgramCache]: Analyzing trace with hash 382365, now seen corresponding path program 1 times [2022-01-09 23:30:51,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:51,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461526241] [2022-01-09 23:30:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:51,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-09 23:30:51,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461526241] [2022-01-09 23:30:51,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461526241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915851791] [2022-01-09 23:30:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:51,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:51,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:51,244 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 23:30:51,296 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 23:30:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:51,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:30:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:30:51,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:30:51,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915851791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:51,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:30:51,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:30:51,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380177515] [2022-01-09 23:30:51,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:51,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:51,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:51,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:51,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:51,736 INFO L87 Difference]: Start difference. First operand 35086 states and 41263 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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 23:30:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:52,508 INFO L93 Difference]: Finished difference Result 84436 states and 99671 transitions. [2022-01-09 23:30:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:52,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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 228 [2022-01-09 23:30:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:52,579 INFO L225 Difference]: With dead ends: 84436 [2022-01-09 23:30:52,579 INFO L226 Difference]: Without dead ends: 49758 [2022-01-09 23:30:52,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:52,609 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:52,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 218 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:30:52,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49758 states. [2022-01-09 23:30:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49758 to 47075. [2022-01-09 23:30:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47075 states, 47074 states have (on average 1.1830947019586184) internal successors, (55693), 47074 states have internal predecessors, (55693), 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 23:30:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47075 states to 47075 states and 55693 transitions. [2022-01-09 23:30:53,463 INFO L78 Accepts]: Start accepts. Automaton has 47075 states and 55693 transitions. Word has length 228 [2022-01-09 23:30:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:53,464 INFO L470 AbstractCegarLoop]: Abstraction has 47075 states and 55693 transitions. [2022-01-09 23:30:53,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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 23:30:53,464 INFO L276 IsEmpty]: Start isEmpty. Operand 47075 states and 55693 transitions. [2022-01-09 23:30:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-09 23:30:53,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:53,525 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-01-09 23:30:53,557 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 23:30:53,742 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 23:30:53,742 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:53,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1347151785, now seen corresponding path program 1 times [2022-01-09 23:30:53,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:53,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656637031] [2022-01-09 23:30:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:53,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-09 23:30:53,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:53,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656637031] [2022-01-09 23:30:53,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656637031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:53,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319829676] [2022-01-09 23:30:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:53,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:53,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:53,839 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 23:30:53,864 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 23:30:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:53,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:30:53,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-09 23:30:54,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:30:54,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319829676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:54,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:30:54,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:30:54,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435348061] [2022-01-09 23:30:54,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:54,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:54,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:54,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:54,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:54,298 INFO L87 Difference]: Start difference. First operand 47075 states and 55693 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 23:30:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:55,106 INFO L93 Difference]: Finished difference Result 93745 states and 110937 transitions. [2022-01-09 23:30:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:55,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 245 [2022-01-09 23:30:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:55,155 INFO L225 Difference]: With dead ends: 93745 [2022-01-09 23:30:55,155 INFO L226 Difference]: Without dead ends: 47078 [2022-01-09 23:30:55,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:55,182 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 262 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:55,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 342 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:30:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47078 states. [2022-01-09 23:30:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47078 to 45856. [2022-01-09 23:30:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45856 states, 45855 states have (on average 1.1619234543670265) internal successors, (53280), 45855 states have internal predecessors, (53280), 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 23:30:55,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45856 states to 45856 states and 53280 transitions. [2022-01-09 23:30:55,897 INFO L78 Accepts]: Start accepts. Automaton has 45856 states and 53280 transitions. Word has length 245 [2022-01-09 23:30:55,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:55,897 INFO L470 AbstractCegarLoop]: Abstraction has 45856 states and 53280 transitions. [2022-01-09 23:30:55,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 23:30:55,898 INFO L276 IsEmpty]: Start isEmpty. Operand 45856 states and 53280 transitions. [2022-01-09 23:30:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-09 23:30:55,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:55,929 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1] [2022-01-09 23:30:55,960 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 23:30:56,142 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 23:30:56,143 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:56,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash -974196740, now seen corresponding path program 1 times [2022-01-09 23:30:56,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:56,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517738904] [2022-01-09 23:30:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:56,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-09 23:30:56,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:56,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517738904] [2022-01-09 23:30:56,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517738904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:56,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880242139] [2022-01-09 23:30:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:56,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:56,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:56,240 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 23:30:56,242 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 23:30:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:56,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:30:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:30:56,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:30:56,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880242139] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:56,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:30:56,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:30:56,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892737594] [2022-01-09 23:30:56,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:56,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:56,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:56,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:56,557 INFO L87 Difference]: Start difference. First operand 45856 states and 53280 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 23:30:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:57,317 INFO L93 Difference]: Finished difference Result 88239 states and 102175 transitions. [2022-01-09 23:30:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:57,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 246 [2022-01-09 23:30:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:57,365 INFO L225 Difference]: With dead ends: 88239 [2022-01-09 23:30:57,365 INFO L226 Difference]: Without dead ends: 42791 [2022-01-09 23:30:57,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:57,395 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 248 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:57,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 376 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:30:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42791 states. [2022-01-09 23:30:57,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42791 to 39332. [2022-01-09 23:30:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39332 states, 39331 states have (on average 1.1241260074750197) internal successors, (44213), 39331 states have internal predecessors, (44213), 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 23:30:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39332 states to 39332 states and 44213 transitions. [2022-01-09 23:30:58,033 INFO L78 Accepts]: Start accepts. Automaton has 39332 states and 44213 transitions. Word has length 246 [2022-01-09 23:30:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:58,034 INFO L470 AbstractCegarLoop]: Abstraction has 39332 states and 44213 transitions. [2022-01-09 23:30:58,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 23:30:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 39332 states and 44213 transitions. [2022-01-09 23:30:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-09 23:30:58,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:58,096 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:58,113 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 23:30:58,309 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 23:30:58,310 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:58,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:58,310 INFO L85 PathProgramCache]: Analyzing trace with hash -35903996, now seen corresponding path program 1 times [2022-01-09 23:30:58,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:58,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476544722] [2022-01-09 23:30:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:58,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 91 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-09 23:30:58,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:58,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476544722] [2022-01-09 23:30:58,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476544722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:58,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141104630] [2022-01-09 23:30:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:58,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:58,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:58,417 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 23:30:58,418 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 23:30:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:58,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:30:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-09 23:30:58,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:30:58,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141104630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:58,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:30:58,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-01-09 23:30:58,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163096356] [2022-01-09 23:30:58,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:58,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:58,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:58,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:58,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:30:58,925 INFO L87 Difference]: Start difference. First operand 39332 states and 44213 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 23:30:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:59,668 INFO L93 Difference]: Finished difference Result 78057 states and 87771 transitions. [2022-01-09 23:30:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:59,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 247 [2022-01-09 23:30:59,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:59,716 INFO L225 Difference]: With dead ends: 78057 [2022-01-09 23:30:59,716 INFO L226 Difference]: Without dead ends: 39336 [2022-01-09 23:30:59,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:30:59,741 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 96 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:59,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 101 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:30:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39336 states. [2022-01-09 23:31:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39336 to 39332. [2022-01-09 23:31:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39332 states, 39331 states have (on average 1.1220157127965218) internal successors, (44130), 39331 states have internal predecessors, (44130), 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 23:31:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39332 states to 39332 states and 44130 transitions. [2022-01-09 23:31:00,245 INFO L78 Accepts]: Start accepts. Automaton has 39332 states and 44130 transitions. Word has length 247 [2022-01-09 23:31:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:00,246 INFO L470 AbstractCegarLoop]: Abstraction has 39332 states and 44130 transitions. [2022-01-09 23:31:00,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 23:31:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 39332 states and 44130 transitions. [2022-01-09 23:31:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-09 23:31:00,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:00,276 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:31:00,295 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 23:31:00,477 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 23:31:00,478 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:00,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:00,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1901025622, now seen corresponding path program 1 times [2022-01-09 23:31:00,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:00,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519628606] [2022-01-09 23:31:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:00,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-01-09 23:31:00,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:00,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519628606] [2022-01-09 23:31:00,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519628606] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:31:00,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605977253] [2022-01-09 23:31:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:00,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:00,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:31:00,660 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:31:00,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 23:31:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:00,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:31:00,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:31:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-09 23:31:01,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:31:01,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605977253] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:01,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:31:01,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:31:01,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988731867] [2022-01-09 23:31:01,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:01,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:01,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:01,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:31:01,109 INFO L87 Difference]: Start difference. First operand 39332 states and 44130 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 23:31:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:01,735 INFO L93 Difference]: Finished difference Result 113467 states and 127351 transitions. [2022-01-09 23:31:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:01,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 275 [2022-01-09 23:31:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:01,821 INFO L225 Difference]: With dead ends: 113467 [2022-01-09 23:31:01,821 INFO L226 Difference]: Without dead ends: 74746 [2022-01-09 23:31:01,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:31:01,854 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 307 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:01,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 865 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:31:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74746 states. [2022-01-09 23:31:02,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74746 to 68041. [2022-01-09 23:31:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68041 states, 68040 states have (on average 1.112962962962963) internal successors, (75726), 68040 states have internal predecessors, (75726), 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 23:31:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68041 states to 68041 states and 75726 transitions. [2022-01-09 23:31:02,899 INFO L78 Accepts]: Start accepts. Automaton has 68041 states and 75726 transitions. Word has length 275 [2022-01-09 23:31:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:02,899 INFO L470 AbstractCegarLoop]: Abstraction has 68041 states and 75726 transitions. [2022-01-09 23:31:02,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 23:31:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 68041 states and 75726 transitions. [2022-01-09 23:31:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-09 23:31:02,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:02,943 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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 23:31:02,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-09 23:31:03,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-09 23:31:03,158 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:03,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1302108884, now seen corresponding path program 1 times [2022-01-09 23:31:03,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:03,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498088090] [2022-01-09 23:31:03,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:03,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 99 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-09 23:31:03,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:03,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498088090] [2022-01-09 23:31:03,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498088090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:31:03,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999902143] [2022-01-09 23:31:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:03,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:03,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:31:03,359 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:31:03,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 23:31:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:03,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:31:03,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:31:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-09 23:31:04,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:31:04,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999902143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:04,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:31:04,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:31:04,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726134184] [2022-01-09 23:31:04,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:04,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:04,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:04,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:31:04,100 INFO L87 Difference]: Start difference. First operand 68041 states and 75726 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 23:31:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:04,825 INFO L93 Difference]: Finished difference Result 134864 states and 150119 transitions. [2022-01-09 23:31:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:04,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 280 [2022-01-09 23:31:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:05,065 INFO L225 Difference]: With dead ends: 134864 [2022-01-09 23:31:05,065 INFO L226 Difference]: Without dead ends: 67434 [2022-01-09 23:31:05,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:31:05,094 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 105 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:05,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 372 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 23:31:05,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67434 states. [2022-01-09 23:31:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67434 to 64996. [2022-01-09 23:31:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64996 states, 64995 states have (on average 1.0931610123855682) internal successors, (71050), 64995 states have internal predecessors, (71050), 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 23:31:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64996 states to 64996 states and 71050 transitions. [2022-01-09 23:31:05,919 INFO L78 Accepts]: Start accepts. Automaton has 64996 states and 71050 transitions. Word has length 280 [2022-01-09 23:31:05,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:05,920 INFO L470 AbstractCegarLoop]: Abstraction has 64996 states and 71050 transitions. [2022-01-09 23:31:05,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 23:31:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 64996 states and 71050 transitions. [2022-01-09 23:31:05,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-09 23:31:05,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:05,989 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:31:06,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-09 23:31:06,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-09 23:31:06,204 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash 677487726, now seen corresponding path program 1 times [2022-01-09 23:31:06,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:06,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504104051] [2022-01-09 23:31:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:06,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 124 proven. 6 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-09 23:31:06,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:06,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504104051] [2022-01-09 23:31:06,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504104051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:31:06,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845079571] [2022-01-09 23:31:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:06,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:06,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:31:06,519 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:31:06,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 23:31:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:06,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:31:06,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:31:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 217 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 23:31:07,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:31:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 217 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 23:31:07,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845079571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:31:07,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:31:07,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-01-09 23:31:07,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115607606] [2022-01-09 23:31:07,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:31:07,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-09 23:31:07,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-09 23:31:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:31:07,593 INFO L87 Difference]: Start difference. First operand 64996 states and 71050 transitions. Second operand has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 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 23:31:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:10,714 INFO L93 Difference]: Finished difference Result 262013 states and 287924 transitions. [2022-01-09 23:31:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 23:31:10,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 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 315 [2022-01-09 23:31:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:10,990 INFO L225 Difference]: With dead ends: 262013 [2022-01-09 23:31:10,991 INFO L226 Difference]: Without dead ends: 197425 [2022-01-09 23:31:11,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 634 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-09 23:31:11,044 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 2802 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 3959 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2802 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 4638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 3959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:11,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2802 Valid, 441 Invalid, 4638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 3959 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-09 23:31:11,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197425 states. [2022-01-09 23:31:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197425 to 194495. [2022-01-09 23:31:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194495 states, 194494 states have (on average 1.0928923257272718) internal successors, (212561), 194494 states have internal predecessors, (212561), 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 23:31:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194495 states to 194495 states and 212561 transitions. [2022-01-09 23:31:13,996 INFO L78 Accepts]: Start accepts. Automaton has 194495 states and 212561 transitions. Word has length 315 [2022-01-09 23:31:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:13,997 INFO L470 AbstractCegarLoop]: Abstraction has 194495 states and 212561 transitions. [2022-01-09 23:31:13,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 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 23:31:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 194495 states and 212561 transitions. [2022-01-09 23:31:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-01-09 23:31:14,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:14,092 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:31:14,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 23:31:14,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-09 23:31:14,310 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:14,311 INFO L85 PathProgramCache]: Analyzing trace with hash 939208580, now seen corresponding path program 1 times [2022-01-09 23:31:14,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:14,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438260229] [2022-01-09 23:31:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:14,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 177 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-09 23:31:14,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:14,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438260229] [2022-01-09 23:31:14,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438260229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:31:14,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320986635] [2022-01-09 23:31:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:14,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:14,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:31:14,422 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:31:14,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 23:31:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:14,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:31:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:31:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-09 23:31:15,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:31:15,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320986635] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:15,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:31:15,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-01-09 23:31:15,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889673286] [2022-01-09 23:31:15,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:15,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:31:15,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:31:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:31:15,268 INFO L87 Difference]: Start difference. First operand 194495 states and 212561 transitions. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 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 23:31:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:17,179 INFO L93 Difference]: Finished difference Result 397537 states and 434235 transitions. [2022-01-09 23:31:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:31:17,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 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 330 [2022-01-09 23:31:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:17,491 INFO L225 Difference]: With dead ends: 397537 [2022-01-09 23:31:17,491 INFO L226 Difference]: Without dead ends: 203856 [2022-01-09 23:31:17,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:31:17,578 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 438 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:17,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 200 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:31:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203856 states. [2022-01-09 23:31:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203856 to 196931. [2022-01-09 23:31:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196931 states, 196930 states have (on average 1.0883918143502767) internal successors, (214337), 196930 states have internal predecessors, (214337), 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 23:31:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196931 states to 196931 states and 214337 transitions. [2022-01-09 23:31:20,682 INFO L78 Accepts]: Start accepts. Automaton has 196931 states and 214337 transitions. Word has length 330 [2022-01-09 23:31:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:20,684 INFO L470 AbstractCegarLoop]: Abstraction has 196931 states and 214337 transitions. [2022-01-09 23:31:20,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 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 23:31:20,684 INFO L276 IsEmpty]: Start isEmpty. Operand 196931 states and 214337 transitions. [2022-01-09 23:31:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-01-09 23:31:20,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:20,788 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:31:20,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-09 23:31:21,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-09 23:31:21,006 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:21,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1410722384, now seen corresponding path program 1 times [2022-01-09 23:31:21,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:21,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733544299] [2022-01-09 23:31:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:21,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 176 proven. 11 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-09 23:31:21,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:21,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733544299] [2022-01-09 23:31:21,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733544299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:31:21,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384014419] [2022-01-09 23:31:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:21,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:31:21,117 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:31:21,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 23:31:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:21,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:31:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:31:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-09 23:31:22,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:31:22,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384014419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:22,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:31:22,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:31:22,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297539510] [2022-01-09 23:31:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:22,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:31:22,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:31:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:31:22,016 INFO L87 Difference]: Start difference. First operand 196931 states and 214337 transitions. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 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 23:31:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:24,509 INFO L93 Difference]: Finished difference Result 448636 states and 489252 transitions. [2022-01-09 23:31:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:31:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 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 346 [2022-01-09 23:31:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:25,068 INFO L225 Difference]: With dead ends: 448636 [2022-01-09 23:31:25,068 INFO L226 Difference]: Without dead ends: 252113 [2022-01-09 23:31:25,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:31:25,224 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 350 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:25,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 154 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-09 23:31:25,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252113 states. [2022-01-09 23:31:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252113 to 200964. [2022-01-09 23:31:28,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200964 states, 200963 states have (on average 1.0762727467245214) internal successors, (216291), 200963 states have internal predecessors, (216291), 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 23:31:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200964 states to 200964 states and 216291 transitions. [2022-01-09 23:31:28,465 INFO L78 Accepts]: Start accepts. Automaton has 200964 states and 216291 transitions. Word has length 346 [2022-01-09 23:31:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:28,465 INFO L470 AbstractCegarLoop]: Abstraction has 200964 states and 216291 transitions. [2022-01-09 23:31:28,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 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 23:31:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 200964 states and 216291 transitions. [2022-01-09 23:31:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-01-09 23:31:28,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:28,954 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:31:28,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 23:31:29,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-09 23:31:29,175 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2120345378, now seen corresponding path program 1 times [2022-01-09 23:31:29,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:29,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344110474] [2022-01-09 23:31:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:29,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 120 proven. 6 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-01-09 23:31:29,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:29,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344110474] [2022-01-09 23:31:29,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344110474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:31:29,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471608473] [2022-01-09 23:31:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:29,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:29,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:31:29,290 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:31:29,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 23:31:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:29,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:31:29,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:31:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-01-09 23:31:29,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:31:29,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471608473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:29,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:31:29,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:31:29,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277311718] [2022-01-09 23:31:29,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:29,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:31:29,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:29,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:31:29,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:31:29,916 INFO L87 Difference]: Start difference. First operand 200964 states and 216291 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 23:31:32,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:32,523 INFO L93 Difference]: Finished difference Result 575029 states and 618504 transitions. [2022-01-09 23:31:32,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:31:32,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 358 [2022-01-09 23:31:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:33,420 INFO L225 Difference]: With dead ends: 575029 [2022-01-09 23:31:33,420 INFO L226 Difference]: Without dead ends: 374676 [2022-01-09 23:31:33,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:31:33,644 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 540 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:33,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 397 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:31:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374676 states. [2022-01-09 23:31:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374676 to 363473. [2022-01-09 23:31:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363473 states, 363472 states have (on average 1.0734527006206807) internal successors, (390170), 363472 states have internal predecessors, (390170), 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 23:31:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363473 states to 363473 states and 390170 transitions. [2022-01-09 23:31:39,460 INFO L78 Accepts]: Start accepts. Automaton has 363473 states and 390170 transitions. Word has length 358 [2022-01-09 23:31:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:39,460 INFO L470 AbstractCegarLoop]: Abstraction has 363473 states and 390170 transitions. [2022-01-09 23:31:39,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 23:31:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 363473 states and 390170 transitions. [2022-01-09 23:31:40,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-01-09 23:31:40,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:40,020 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:31:40,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-09 23:31:40,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:40,238 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:40,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:40,238 INFO L85 PathProgramCache]: Analyzing trace with hash 287943473, now seen corresponding path program 1 times [2022-01-09 23:31:40,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:40,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979400066] [2022-01-09 23:31:40,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:40,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms