/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:18:58,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:18:58,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:18:58,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:18:58,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:18:58,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:18:58,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:18:58,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:18:58,230 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:18:58,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:18:58,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:18:58,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:18:58,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:18:58,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:18:58,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:18:58,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:18:58,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:18:58,233 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:18:58,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:18:58,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:18:58,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:18:58,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:18:58,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:18:58,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:18:58,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:18:58,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:18:58,234 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:18:58,234 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:18:58,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:18:58,235 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:18:58,235 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:18:58,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:18:58,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:18:58,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:18:58,479 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:18:58,479 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:18:58,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2022-04-06 20:18:58,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91d112c33/c4472bcee6094f80b71f6d647a964f6b/FLAGb47f22017 [2022-04-06 20:18:58,913 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:18:58,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2022-04-06 20:18:58,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91d112c33/c4472bcee6094f80b71f6d647a964f6b/FLAGb47f22017 [2022-04-06 20:18:58,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91d112c33/c4472bcee6094f80b71f6d647a964f6b [2022-04-06 20:18:58,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:18:58,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:18:58,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:18:58,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:18:58,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:18:58,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:18:58" (1/1) ... [2022-04-06 20:18:58,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277d844b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:18:58, skipping insertion in model container [2022-04-06 20:18:58,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:18:58" (1/1) ... [2022-04-06 20:18:58,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:18:58,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:18:59,236 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2022-04-06 20:18:59,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:18:59,253 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:18:59,316 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2022-04-06 20:18:59,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:18:59,358 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:18:59,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:18:59 WrapperNode [2022-04-06 20:18:59,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:18:59,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:18:59,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:18:59,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:18:59,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:18:59" (1/1) ... [2022-04-06 20:18:59,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:18:59" (1/1) ... [2022-04-06 20:18:59,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:18:59" (1/1) ... [2022-04-06 20:18:59,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:18:59" (1/1) ... [2022-04-06 20:18:59,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:18:59" (1/1) ... [2022-04-06 20:18:59,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:18:59" (1/1) ... [2022-04-06 20:18:59,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:18:59" (1/1) ... [2022-04-06 20:18:59,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:18:59,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:18:59,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:18:59,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:18:59,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:18:59" (1/1) ... [2022-04-06 20:18:59,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:18:59,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:18:59,493 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) [2022-04-06 20:18:59,514 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 [2022-04-06 20:18:59,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:18:59,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:18:59,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:18:59,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:18:59,541 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:18:59,541 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:18:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:18:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:18:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-04-06 20:18:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-04-06 20:18:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:18:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:18:59,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 20:18:59,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:18:59,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-04-06 20:18:59,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:18:59,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:18:59,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:18:59,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:18:59,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-04-06 20:18:59,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:18:59,697 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:18:59,698 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:19:00,275 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:19:00,282 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:19:00,282 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-04-06 20:19:00,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:19:00 BoogieIcfgContainer [2022-04-06 20:19:00,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:19:00,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:19:00,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:19:00,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:19:00,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:18:58" (1/3) ... [2022-04-06 20:19:00,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4431e6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:19:00, skipping insertion in model container [2022-04-06 20:19:00,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:18:59" (2/3) ... [2022-04-06 20:19:00,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4431e6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:19:00, skipping insertion in model container [2022-04-06 20:19:00,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:19:00" (3/3) ... [2022-04-06 20:19:00,294 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2022-04-06 20:19:00,300 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:19:00,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:19:00,351 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:19:00,362 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-04-06 20:19:00,362 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:19:00,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:19:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:19:00,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:19:00,393 INFO L499 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] [2022-04-06 20:19:00,394 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:19:00,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:19:00,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1054632774, now seen corresponding path program 1 times [2022-04-06 20:19:00,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:00,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [99243088] [2022-04-06 20:19:00,417 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:19:00,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1054632774, now seen corresponding path program 2 times [2022-04-06 20:19:00,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:19:00,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358224721] [2022-04-06 20:19:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:19:00,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:19:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:01,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:19:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:01,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:19:01,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358224721] [2022-04-06 20:19:01,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358224721] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:19:01,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:19:01,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:19:01,402 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:19:01,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [99243088] [2022-04-06 20:19:01,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [99243088] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:19:01,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:19:01,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:19:01,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706302624] [2022-04-06 20:19:01,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:19:01,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:19:01,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:19:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:19:01,442 INFO L87 Difference]: Start difference. First operand has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:19:02,159 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2022-04-06 20:19:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:19:02,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:19:02,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:19:02,167 INFO L225 Difference]: With dead ends: 92 [2022-04-06 20:19:02,167 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 20:19:02,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:19:02,172 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 120 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:19:02,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 717 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:19:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 20:19:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-04-06 20:19:02,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-04-06 20:19:02,213 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2022-04-06 20:19:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:19:02,214 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-04-06 20:19:02,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-04-06 20:19:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:19:02,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:19:02,216 INFO L499 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] [2022-04-06 20:19:02,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:19:02,216 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:19:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:19:02,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1470519801, now seen corresponding path program 1 times [2022-04-06 20:19:02,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:02,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [248402179] [2022-04-06 20:19:02,217 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:19:02,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1470519801, now seen corresponding path program 2 times [2022-04-06 20:19:02,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:19:02,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398406942] [2022-04-06 20:19:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:19:02,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:19:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:02,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:19:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:02,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:19:02,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398406942] [2022-04-06 20:19:02,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398406942] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:19:02,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798531337] [2022-04-06 20:19:02,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:19:02,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:02,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:19:02,651 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) [2022-04-06 20:19:02,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:19:03,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:19:03,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:19:03,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:19:03,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:19:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:03,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:19:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:03,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798531337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:19:03,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:19:03,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32 [2022-04-06 20:19:03,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:19:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [248402179] [2022-04-06 20:19:03,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [248402179] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:19:03,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:19:03,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:19:03,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869322084] [2022-04-06 20:19:03,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:19:03,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:19:03,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:03,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:19:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:19:03,890 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:04,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:19:04,423 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-04-06 20:19:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:19:04,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:19:04,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:19:04,425 INFO L225 Difference]: With dead ends: 65 [2022-04-06 20:19:04,425 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 20:19:04,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=358, Invalid=1202, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:19:04,427 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:19:04,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 239 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:19:04,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 20:19:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-04-06 20:19:04,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:04,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-04-06 20:19:04,440 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2022-04-06 20:19:04,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:19:04,440 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-04-06 20:19:04,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:04,441 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-04-06 20:19:04,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:19:04,442 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:19:04,442 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 20:19:04,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:19:04,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:04,665 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:19:04,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:19:04,666 INFO L85 PathProgramCache]: Analyzing trace with hash 412615706, now seen corresponding path program 3 times [2022-04-06 20:19:04,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:04,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2066499450] [2022-04-06 20:19:04,667 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:19:04,667 INFO L85 PathProgramCache]: Analyzing trace with hash 412615706, now seen corresponding path program 4 times [2022-04-06 20:19:04,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:19:04,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676528753] [2022-04-06 20:19:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:19:04,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:19:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:05,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:19:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:05,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:19:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676528753] [2022-04-06 20:19:05,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676528753] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:19:05,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856558877] [2022-04-06 20:19:05,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:19:05,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:05,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:19:05,076 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) [2022-04-06 20:19:05,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:19:05,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:19:05,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:19:05,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:19:05,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:19:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:05,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:19:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:06,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856558877] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:19:06,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:19:06,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 34 [2022-04-06 20:19:06,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:19:06,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2066499450] [2022-04-06 20:19:06,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2066499450] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:19:06,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:19:06,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:19:06,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857417973] [2022-04-06 20:19:06,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:19:06,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:19:06,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:06,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:19:06,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:19:06,102 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:19:06,724 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-04-06 20:19:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:19:06,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:19:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:19:06,730 INFO L225 Difference]: With dead ends: 70 [2022-04-06 20:19:06,730 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 20:19:06,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=413, Invalid=1393, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:19:06,732 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:19:06,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 292 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:19:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 20:19:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-04-06 20:19:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-04-06 20:19:06,759 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2022-04-06 20:19:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:19:06,759 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-04-06 20:19:06,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-04-06 20:19:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:19:06,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:19:06,760 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:19:06,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:19:06,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 20:19:06,973 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:19:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:19:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1771010407, now seen corresponding path program 5 times [2022-04-06 20:19:06,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:06,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [194272822] [2022-04-06 20:19:06,974 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:19:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1771010407, now seen corresponding path program 6 times [2022-04-06 20:19:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:19:06,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137080264] [2022-04-06 20:19:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:19:06,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:19:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:07,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:19:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:07,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:19:07,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137080264] [2022-04-06 20:19:07,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137080264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:19:07,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941584239] [2022-04-06 20:19:07,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:19:07,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:07,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:19:07,426 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) [2022-04-06 20:19:07,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:19:09,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:19:09,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:19:09,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:19:09,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:19:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:09,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:19:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:10,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941584239] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:19:10,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:19:10,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 36 [2022-04-06 20:19:10,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:19:10,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [194272822] [2022-04-06 20:19:10,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [194272822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:19:10,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:19:10,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:19:10,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730111138] [2022-04-06 20:19:10,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:19:10,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:19:10,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:10,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:19:10,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:19:10,372 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:19:11,029 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-04-06 20:19:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:19:11,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:19:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:19:11,030 INFO L225 Difference]: With dead ends: 75 [2022-04-06 20:19:11,030 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 20:19:11,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=472, Invalid=1598, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:19:11,034 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:19:11,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 328 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:19:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 20:19:11,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-04-06 20:19:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:11,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-04-06 20:19:11,045 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 63 [2022-04-06 20:19:11,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:19:11,046 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-04-06 20:19:11,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:11,046 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-04-06 20:19:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:19:11,047 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:19:11,047 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:19:11,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:19:11,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:11,252 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:19:11,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:19:11,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1370440838, now seen corresponding path program 7 times [2022-04-06 20:19:11,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:11,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1154325639] [2022-04-06 20:19:11,253 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:19:11,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1370440838, now seen corresponding path program 8 times [2022-04-06 20:19:11,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:19:11,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099957562] [2022-04-06 20:19:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:19:11,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:19:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:11,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:19:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:11,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:19:11,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099957562] [2022-04-06 20:19:11,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099957562] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:19:11,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312206576] [2022-04-06 20:19:11,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:19:11,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:11,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:19:11,640 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) [2022-04-06 20:19:11,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:19:12,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:19:12,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:19:12,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:19:12,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:19:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:12,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:19:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:12,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312206576] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:19:12,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:19:12,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 38 [2022-04-06 20:19:12,924 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:19:12,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1154325639] [2022-04-06 20:19:12,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1154325639] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:19:12,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:19:12,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:19:12,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265752934] [2022-04-06 20:19:12,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:19:12,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:19:12,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:12,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:19:12,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:19:12,926 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:13,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:19:13,528 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-04-06 20:19:13,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:19:13,528 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:19:13,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:19:13,529 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:19:13,529 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 20:19:13,530 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:19:13,531 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:19:13,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 352 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:19:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 20:19:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-04-06 20:19:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-04-06 20:19:13,541 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 68 [2022-04-06 20:19:13,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:19:13,542 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-04-06 20:19:13,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:13,542 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-04-06 20:19:13,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 20:19:13,543 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:19:13,543 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:19:13,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:19:13,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:13,767 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:19:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:19:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1100780743, now seen corresponding path program 9 times [2022-04-06 20:19:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:13,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [65485114] [2022-04-06 20:19:13,769 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:19:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1100780743, now seen corresponding path program 10 times [2022-04-06 20:19:13,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:19:13,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482308850] [2022-04-06 20:19:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:19:13,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:19:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:14,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:19:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:14,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:19:14,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482308850] [2022-04-06 20:19:14,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482308850] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:19:14,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834677877] [2022-04-06 20:19:14,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:19:14,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:14,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:19:14,241 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) [2022-04-06 20:19:14,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:19:14,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:19:14,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:19:14,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:19:14,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:19:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:14,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:19:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:15,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834677877] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:19:15,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:19:15,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 40 [2022-04-06 20:19:15,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:19:15,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [65485114] [2022-04-06 20:19:15,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [65485114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:19:15,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:19:15,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:19:15,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99378398] [2022-04-06 20:19:15,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:19:15,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:19:15,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:15,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:19:15,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:19:15,372 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:19:16,135 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-04-06 20:19:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:19:16,136 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 20:19:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:19:16,137 INFO L225 Difference]: With dead ends: 85 [2022-04-06 20:19:16,137 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 20:19:16,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=602, Invalid=2050, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:19:16,138 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:19:16,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 406 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:19:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 20:19:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2022-04-06 20:19:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-04-06 20:19:16,150 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 73 [2022-04-06 20:19:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:19:16,150 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-04-06 20:19:16,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-04-06 20:19:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 20:19:16,151 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:19:16,152 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:19:16,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:19:16,352 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:16,352 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:19:16,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:19:16,353 INFO L85 PathProgramCache]: Analyzing trace with hash -812401958, now seen corresponding path program 11 times [2022-04-06 20:19:16,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:16,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1890100779] [2022-04-06 20:19:16,353 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:19:16,353 INFO L85 PathProgramCache]: Analyzing trace with hash -812401958, now seen corresponding path program 12 times [2022-04-06 20:19:16,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:19:16,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139142940] [2022-04-06 20:19:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:19:16,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:19:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:16,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:19:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:16,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:19:16,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139142940] [2022-04-06 20:19:16,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139142940] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:19:16,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968612516] [2022-04-06 20:19:16,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:19:16,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:19:16,840 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) [2022-04-06 20:19:16,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:19:18,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:19:18,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:19:18,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 114 conjunts are in the unsatisfiable core [2022-04-06 20:19:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:19:29,312 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 20:19:29,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 30 select indices, 30 select index equivalence classes, 406 disjoint index pairs (out of 435 index pairs), introduced 30 new quantified variables, introduced 435 case distinctions, treesize of input 211 treesize of output 323 [2022-04-06 20:19:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:19:51,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:19:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:19:54,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968612516] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:19:54,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:19:54,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 15] total 51 [2022-04-06 20:19:54,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:19:54,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1890100779] [2022-04-06 20:19:54,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1890100779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:19:54,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:19:54,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:19:54,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027992167] [2022-04-06 20:19:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:19:54,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:19:54,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:54,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:19:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2181, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:19:54,878 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:56,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:19:56,026 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-04-06 20:19:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:19:56,027 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-04-06 20:19:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:19:56,028 INFO L225 Difference]: With dead ends: 90 [2022-04-06 20:19:56,028 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 20:19:56,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=484, Invalid=3548, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:19:56,029 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:19:56,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 438 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:19:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 20:19:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2022-04-06 20:19:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:56,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-04-06 20:19:56,040 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 78 [2022-04-06 20:19:56,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:19:56,040 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-04-06 20:19:56,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-04-06 20:19:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:19:56,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:19:56,042 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:19:56,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 20:19:56,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:56,248 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:19:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:19:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash -570882087, now seen corresponding path program 13 times [2022-04-06 20:19:56,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:56,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [558334875] [2022-04-06 20:19:56,249 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:19:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash -570882087, now seen corresponding path program 14 times [2022-04-06 20:19:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:19:56,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147604576] [2022-04-06 20:19:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:19:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:19:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:56,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:19:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:56,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:19:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147604576] [2022-04-06 20:19:56,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147604576] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:19:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093240406] [2022-04-06 20:19:56,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:19:56,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:56,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:19:56,742 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) [2022-04-06 20:19:56,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:19:57,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:19:57,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:19:57,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:19:57,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:19:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:57,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:19:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:58,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093240406] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:19:58,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:19:58,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 44 [2022-04-06 20:19:58,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:19:58,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [558334875] [2022-04-06 20:19:58,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [558334875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:19:58,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:19:58,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:19:58,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630898040] [2022-04-06 20:19:58,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:19:58,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:19:58,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:19:58,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:19:58,192 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:19:59,103 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-04-06 20:19:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:19:59,104 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 20:19:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:19:59,104 INFO L225 Difference]: With dead ends: 95 [2022-04-06 20:19:59,105 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 20:19:59,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=748, Invalid=2558, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:19:59,106 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:19:59,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 492 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:19:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 20:19:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-04-06 20:19:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-04-06 20:19:59,119 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 83 [2022-04-06 20:19:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:19:59,119 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-04-06 20:19:59,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:19:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-04-06 20:19:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 20:19:59,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:19:59,121 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:19:59,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:19:59,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:59,331 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:19:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:19:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1780941370, now seen corresponding path program 15 times [2022-04-06 20:19:59,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:59,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1452143933] [2022-04-06 20:19:59,333 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:19:59,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1780941370, now seen corresponding path program 16 times [2022-04-06 20:19:59,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:19:59,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761743768] [2022-04-06 20:19:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:19:59,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:19:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:59,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:19:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:19:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:59,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:19:59,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761743768] [2022-04-06 20:19:59,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761743768] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:19:59,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452093] [2022-04-06 20:19:59,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:19:59,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:59,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:19:59,773 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) [2022-04-06 20:19:59,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:20:00,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:20:00,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:20:00,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:20:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:20:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:20:00,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:20:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:20:01,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452093] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:20:01,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:20:01,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 46 [2022-04-06 20:20:01,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:20:01,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1452143933] [2022-04-06 20:20:01,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1452143933] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:20:01,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:20:01,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:20:01,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484918461] [2022-04-06 20:20:01,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:20:01,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:20:01,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:20:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:20:01,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1570, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:20:01,142 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:20:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:20:01,993 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-04-06 20:20:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:20:01,993 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-04-06 20:20:01,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:20:01,994 INFO L225 Difference]: With dead ends: 100 [2022-04-06 20:20:01,994 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 20:20:01,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=827, Invalid=2833, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:20:01,995 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:20:01,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 484 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:20:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 20:20:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2022-04-06 20:20:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:20:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-04-06 20:20:02,007 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 88 [2022-04-06 20:20:02,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:20:02,007 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-04-06 20:20:02,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:20:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-04-06 20:20:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 20:20:02,008 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:20:02,009 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:20:02,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 20:20:02,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 20:20:02,220 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:20:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:20:02,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1289003911, now seen corresponding path program 17 times [2022-04-06 20:20:02,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:20:02,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335507586] [2022-04-06 20:20:02,221 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:20:02,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1289003911, now seen corresponding path program 18 times [2022-04-06 20:20:02,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:20:02,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628684182] [2022-04-06 20:20:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:20:02,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:20:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:20:02,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:20:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:20:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:20:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:20:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628684182] [2022-04-06 20:20:02,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628684182] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:20:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302772601] [2022-04-06 20:20:02,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:20:02,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:20:02,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:20:02,719 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) [2022-04-06 20:20:02,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:20:10,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:20:10,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:20:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 178 conjunts are in the unsatisfiable core [2022-04-06 20:20:10,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:20:30,220 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 20:20:30,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 40 select indices, 40 select index equivalence classes, 741 disjoint index pairs (out of 780 index pairs), introduced 40 new quantified variables, introduced 780 case distinctions, treesize of input 281 treesize of output 433 [2022-04-06 20:23:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-04-06 20:23:16,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:23:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 20:23:24,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302772601] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:23:24,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:23:24,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 73 [2022-04-06 20:23:24,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:23:24,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335507586] [2022-04-06 20:23:24,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335507586] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:23:24,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:23:24,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:23:24,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963214766] [2022-04-06 20:23:24,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:23:24,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:23:24,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:24,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:23:24,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=760, Invalid=4496, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:23:24,553 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:23:26,025 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2022-04-06 20:23:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:23:26,025 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 20:23:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:23:26,026 INFO L225 Difference]: With dead ends: 105 [2022-04-06 20:23:26,026 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 20:23:26,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=903, Invalid=6929, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:23:26,028 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 66 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:23:26,028 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 548 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:23:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 20:23:26,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2022-04-06 20:23:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-04-06 20:23:26,038 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 93 [2022-04-06 20:23:26,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:23:26,038 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-04-06 20:23:26,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:26,038 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-04-06 20:23:26,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 20:23:26,039 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:23:26,039 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:23:26,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 20:23:26,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 20:23:26,247 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:23:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:23:26,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1817219482, now seen corresponding path program 19 times [2022-04-06 20:23:26,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:26,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2118117990] [2022-04-06 20:23:26,248 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:23:26,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1817219482, now seen corresponding path program 20 times [2022-04-06 20:23:26,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:23:26,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998943400] [2022-04-06 20:23:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:23:26,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:23:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:26,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:23:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:26,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:23:26,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998943400] [2022-04-06 20:23:26,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998943400] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:23:26,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029811632] [2022-04-06 20:23:26,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:23:26,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:26,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:23:26,806 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) [2022-04-06 20:23:26,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:23:27,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:23:27,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:23:27,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:23:27,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:23:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:27,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:23:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:28,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029811632] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:23:28,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:23:28,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 50 [2022-04-06 20:23:28,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:23:28,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2118117990] [2022-04-06 20:23:28,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2118117990] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:23:28,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:23:28,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:23:28,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826304867] [2022-04-06 20:23:28,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:23:28,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:23:28,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:28,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:23:28,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=1858, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:23:28,376 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:23:29,455 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-04-06 20:23:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:23:29,455 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-04-06 20:23:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:23:29,456 INFO L225 Difference]: With dead ends: 110 [2022-04-06 20:23:29,456 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 20:23:29,457 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=997, Invalid=3425, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:23:29,457 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 69 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:23:29,458 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 636 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:23:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 20:23:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2022-04-06 20:23:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-04-06 20:23:29,467 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 98 [2022-04-06 20:23:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:23:29,467 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-04-06 20:23:29,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-04-06 20:23:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 20:23:29,468 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:23:29,468 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:23:29,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 20:23:29,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 20:23:29,670 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:23:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:23:29,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1265920281, now seen corresponding path program 21 times [2022-04-06 20:23:29,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:29,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2019460294] [2022-04-06 20:23:29,671 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:23:29,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1265920281, now seen corresponding path program 22 times [2022-04-06 20:23:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:23:29,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615379173] [2022-04-06 20:23:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:23:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:23:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:30,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:23:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:30,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:23:30,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615379173] [2022-04-06 20:23:30,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615379173] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:23:30,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570236939] [2022-04-06 20:23:30,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:23:30,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:30,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:23:30,226 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) [2022-04-06 20:23:30,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:23:30,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:23:30,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:23:30,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:23:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:23:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:30,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:23:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:31,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570236939] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:23:31,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:23:31,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 52 [2022-04-06 20:23:31,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:23:31,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2019460294] [2022-04-06 20:23:31,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2019460294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:23:31,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:23:31,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:23:31,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764776885] [2022-04-06 20:23:31,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:23:31,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:23:31,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:31,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:23:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=2011, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:23:31,831 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:23:32,988 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2022-04-06 20:23:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:23:32,989 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-04-06 20:23:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:23:32,989 INFO L225 Difference]: With dead ends: 115 [2022-04-06 20:23:32,989 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 20:23:32,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:23:32,991 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1879 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:23:32,991 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 673 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1879 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:23:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 20:23:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-04-06 20:23:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-04-06 20:23:33,001 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 103 [2022-04-06 20:23:33,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:23:33,002 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-04-06 20:23:33,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:33,002 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-04-06 20:23:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 20:23:33,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:23:33,003 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:23:33,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:23:33,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 20:23:33,203 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:23:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:23:33,204 INFO L85 PathProgramCache]: Analyzing trace with hash 618031354, now seen corresponding path program 23 times [2022-04-06 20:23:33,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:33,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [595021947] [2022-04-06 20:23:33,205 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:23:33,205 INFO L85 PathProgramCache]: Analyzing trace with hash 618031354, now seen corresponding path program 24 times [2022-04-06 20:23:33,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:23:33,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512679850] [2022-04-06 20:23:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:23:33,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:23:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:33,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:23:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:33,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:23:33,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512679850] [2022-04-06 20:23:33,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512679850] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:23:33,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857360364] [2022-04-06 20:23:33,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:23:33,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:33,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:23:33,804 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) [2022-04-06 20:23:33,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:23:37,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:23:37,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:23:37,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:23:37,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:23:37,893 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 20:23:37,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 26 [2022-04-06 20:23:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-04-06 20:23:38,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:23:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-04-06 20:23:40,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857360364] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:23:40,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:23:40,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 9, 9] total 44 [2022-04-06 20:23:40,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:23:40,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [595021947] [2022-04-06 20:23:40,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [595021947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:23:40,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:23:40,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:23:40,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467238689] [2022-04-06 20:23:40,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:23:40,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:23:40,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:40,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:23:40,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:23:40,549 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:23:41,826 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-04-06 20:23:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:23:41,826 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-04-06 20:23:41,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:23:41,827 INFO L225 Difference]: With dead ends: 120 [2022-04-06 20:23:41,827 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 20:23:41,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=398, Invalid=3508, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:23:41,828 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:23:41,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 726 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:23:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 20:23:41,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-04-06 20:23:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-04-06 20:23:41,841 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 108 [2022-04-06 20:23:41,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:23:41,842 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-04-06 20:23:41,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:41,842 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-04-06 20:23:41,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:23:41,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:23:41,843 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:23:41,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:23:42,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 20:23:42,058 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:23:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:23:42,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1546768967, now seen corresponding path program 25 times [2022-04-06 20:23:42,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:42,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1564238126] [2022-04-06 20:23:42,059 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:23:42,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1546768967, now seen corresponding path program 26 times [2022-04-06 20:23:42,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:23:42,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604296133] [2022-04-06 20:23:42,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:23:42,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:23:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:23:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:42,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:23:42,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604296133] [2022-04-06 20:23:42,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604296133] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:23:42,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037965067] [2022-04-06 20:23:42,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:23:42,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:42,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:23:42,679 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) [2022-04-06 20:23:42,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:23:43,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:23:43,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:23:43,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:23:43,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:23:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:43,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:23:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:44,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037965067] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:23:44,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:23:44,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 56 [2022-04-06 20:23:44,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:23:44,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1564238126] [2022-04-06 20:23:44,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1564238126] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:23:44,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:23:44,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:23:44,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101209502] [2022-04-06 20:23:44,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:23:44,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:23:44,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:44,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:23:44,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=2341, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:23:44,494 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:23:45,787 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2022-04-06 20:23:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:23:45,788 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-04-06 20:23:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:23:45,788 INFO L225 Difference]: With dead ends: 125 [2022-04-06 20:23:45,788 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 20:23:45,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1270, Invalid=4430, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:23:45,790 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 75 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 2285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:23:45,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 775 Invalid, 2285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2241 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:23:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 20:23:45,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2022-04-06 20:23:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.008695652173913) internal successors, (116), 115 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-04-06 20:23:45,800 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 113 [2022-04-06 20:23:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:23:45,800 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-04-06 20:23:45,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-04-06 20:23:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 20:23:45,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:23:45,801 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:23:45,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:23:46,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 20:23:46,002 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:23:46,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:23:46,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1560377254, now seen corresponding path program 27 times [2022-04-06 20:23:46,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:46,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1434282606] [2022-04-06 20:23:46,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:23:46,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1560377254, now seen corresponding path program 28 times [2022-04-06 20:23:46,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:23:46,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564213540] [2022-04-06 20:23:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:23:46,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:23:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:46,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:23:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:46,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:23:46,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564213540] [2022-04-06 20:23:46,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564213540] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:23:46,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234915780] [2022-04-06 20:23:46,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:23:46,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:46,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:23:46,592 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:23:46,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:23:46,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:23:46,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:23:46,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:23:47,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:23:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:47,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:23:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:48,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234915780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:23:48,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:23:48,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27, 27] total 58 [2022-04-06 20:23:48,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:23:48,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1434282606] [2022-04-06 20:23:48,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1434282606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:23:48,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:23:48,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:23:48,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990074574] [2022-04-06 20:23:48,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:23:48,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:23:48,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:48,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:23:48,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2521, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:23:48,485 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:49,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:23:49,927 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-04-06 20:23:49,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:23:49,927 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-04-06 20:23:49,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:23:49,928 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:23:49,928 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 20:23:49,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1355, Invalid=4807, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:23:49,929 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 75 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:23:49,929 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 838 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:23:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 20:23:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-04-06 20:23:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2022-04-06 20:23:49,950 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 118 [2022-04-06 20:23:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:23:49,951 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2022-04-06 20:23:49,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:23:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2022-04-06 20:23:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 20:23:49,958 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:23:49,958 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:23:49,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:23:50,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:50,172 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:23:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:23:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1219668569, now seen corresponding path program 29 times [2022-04-06 20:23:50,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:50,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1454571226] [2022-04-06 20:23:50,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:23:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1219668569, now seen corresponding path program 30 times [2022-04-06 20:23:50,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:23:50,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398623786] [2022-04-06 20:23:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:23:50,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:23:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:50,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:23:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:50,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:23:50,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398623786] [2022-04-06 20:23:50,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398623786] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:23:50,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979129200] [2022-04-06 20:23:50,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:23:50,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:50,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:23:50,849 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:23:50,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:23:55,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:23:55,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:23:55,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 111 conjunts are in the unsatisfiable core [2022-04-06 20:23:55,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:24:10,201 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 20:24:10,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 210 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 155 treesize of output 239 [2022-04-06 20:24:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 59 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-04-06 20:24:21,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:24:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-04-06 20:24:26,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979129200] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:24:26,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:24:26,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 22, 20] total 71 [2022-04-06 20:24:26,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:26,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1454571226] [2022-04-06 20:24:26,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1454571226] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:26,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:26,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:24:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567394966] [2022-04-06 20:24:26,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:26,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:24:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:24:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=4352, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:24:26,141 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 32 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:27,998 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2022-04-06 20:24:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:24:27,998 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 32 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-04-06 20:24:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:27,999 INFO L225 Difference]: With dead ends: 135 [2022-04-06 20:24:27,999 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 20:24:28,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 206 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=815, Invalid=7741, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:24:28,001 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 76 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 2639 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:28,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 897 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2639 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:24:28,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 20:24:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2022-04-06 20:24:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.008) internal successors, (126), 125 states have internal predecessors, (126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-04-06 20:24:28,016 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 123 [2022-04-06 20:24:28,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:28,016 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-04-06 20:24:28,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 32 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:28,016 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-04-06 20:24:28,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 20:24:28,017 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:28,017 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:28,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 20:24:28,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 20:24:28,231 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash 378466234, now seen corresponding path program 31 times [2022-04-06 20:24:28,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:28,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296974917] [2022-04-06 20:24:28,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:24:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash 378466234, now seen corresponding path program 32 times [2022-04-06 20:24:28,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:28,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576033504] [2022-04-06 20:24:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:28,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:28,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:28,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576033504] [2022-04-06 20:24:28,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576033504] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:24:28,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861638768] [2022-04-06 20:24:28,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:24:28,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:28,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:28,948 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:24:28,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:24:29,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:24:29,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:24:29,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 1455 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:24:29,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:24:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:30,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:24:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:31,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861638768] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:24:31,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:24:31,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 29, 29] total 62 [2022-04-06 20:24:31,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:31,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296974917] [2022-04-06 20:24:31,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296974917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:31,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:31,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:24:31,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532261389] [2022-04-06 20:24:31,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:31,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:24:31,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:24:31,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2911, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:24:31,263 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 33 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:32,937 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-04-06 20:24:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:24:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 33 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-04-06 20:24:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:32,938 INFO L225 Difference]: With dead ends: 140 [2022-04-06 20:24:32,938 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 20:24:32,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1513, Invalid=5627, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:24:32,940 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2946 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 2996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:32,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 984 Invalid, 2996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2946 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:24:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 20:24:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-04-06 20:24:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2022-04-06 20:24:32,955 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 128 [2022-04-06 20:24:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:32,955 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2022-04-06 20:24:32,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 33 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2022-04-06 20:24:32,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 20:24:32,957 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:32,957 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:32,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 20:24:33,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 20:24:33,172 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash -165945607, now seen corresponding path program 33 times [2022-04-06 20:24:33,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:33,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [182512159] [2022-04-06 20:24:33,173 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:24:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash -165945607, now seen corresponding path program 34 times [2022-04-06 20:24:33,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:33,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013511458] [2022-04-06 20:24:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:33,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:33,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:33,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:33,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013511458] [2022-04-06 20:24:33,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013511458] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:24:33,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074404610] [2022-04-06 20:24:33,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:24:33,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:33,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:33,926 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:24:33,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:24:34,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:24:34,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:24:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1493 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:24:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:24:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:34,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:24:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:36,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074404610] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:24:36,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:24:36,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 30, 30] total 64 [2022-04-06 20:24:36,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:36,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [182512159] [2022-04-06 20:24:36,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [182512159] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:36,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:36,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:24:36,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853858500] [2022-04-06 20:24:36,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:36,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:24:36,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:36,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:24:36,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=3121, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:24:36,176 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 34 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:37,933 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2022-04-06 20:24:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:24:37,934 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 34 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-04-06 20:24:37,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:37,934 INFO L225 Difference]: With dead ends: 145 [2022-04-06 20:24:37,934 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 20:24:37,935 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1586, Invalid=6070, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:24:37,935 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 81 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 3067 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 3119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:37,935 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1021 Invalid, 3119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3067 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:24:37,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 20:24:37,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-04-06 20:24:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 135 states have internal predecessors, (136), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-04-06 20:24:37,947 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 133 [2022-04-06 20:24:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:37,947 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-04-06 20:24:37,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 34 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-04-06 20:24:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 20:24:37,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:37,949 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:37,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:24:38,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 20:24:38,176 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:38,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash 802004762, now seen corresponding path program 35 times [2022-04-06 20:24:38,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:38,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [721384090] [2022-04-06 20:24:38,177 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:24:38,177 INFO L85 PathProgramCache]: Analyzing trace with hash 802004762, now seen corresponding path program 36 times [2022-04-06 20:24:38,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:38,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573303211] [2022-04-06 20:24:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:38,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:38,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:38,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:38,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573303211] [2022-04-06 20:24:38,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573303211] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:24:38,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377499963] [2022-04-06 20:24:38,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:24:38,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:38,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:38,829 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:24:38,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:24:42,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:24:42,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:24:42,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 163 conjunts are in the unsatisfiable core [2022-04-06 20:24:42,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:25,156 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 20:25:25,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 42 select indices, 42 select index equivalence classes, 820 disjoint index pairs (out of 861 index pairs), introduced 42 new quantified variables, introduced 861 case distinctions, treesize of input 295 treesize of output 459 [2022-04-06 20:28:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 51 proven. 71 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-04-06 20:28:20,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-04-06 20:28:26,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377499963] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:26,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:26,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 23, 21] total 76 [2022-04-06 20:28:26,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:26,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [721384090] [2022-04-06 20:28:26,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [721384090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:26,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:26,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:28:26,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239271010] [2022-04-06 20:28:26,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:26,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:28:26,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:28:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=4998, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:28:26,278 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 36 states, 36 states have (on average 3.75) internal successors, (135), 35 states have internal predecessors, (135), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:28,568 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-04-06 20:28:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:28:28,572 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.75) internal successors, (135), 35 states have internal predecessors, (135), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-04-06 20:28:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:28,573 INFO L225 Difference]: With dead ends: 150 [2022-04-06 20:28:28,573 INFO L226 Difference]: Without dead ends: 147 [2022-04-06 20:28:28,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=926, Invalid=9174, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:28:28,574 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 84 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:28,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1083 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:28:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-06 20:28:28,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2022-04-06 20:28:28,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2022-04-06 20:28:28,590 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 138 [2022-04-06 20:28:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:28,591 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2022-04-06 20:28:28,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.75) internal successors, (135), 35 states have internal predecessors, (135), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2022-04-06 20:28:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 20:28:28,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:28,592 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:28,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:28,802 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:28,802 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash 931384217, now seen corresponding path program 37 times [2022-04-06 20:28:28,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:28,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1599421403] [2022-04-06 20:28:28,804 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:28:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash 931384217, now seen corresponding path program 38 times [2022-04-06 20:28:28,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:28,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671304136] [2022-04-06 20:28:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:28,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:29,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:29,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:29,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671304136] [2022-04-06 20:28:29,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671304136] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:29,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504950108] [2022-04-06 20:28:29,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:29,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:29,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:29,538 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:29,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:28:30,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:30,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:28:30,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:30,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:31,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504950108] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:31,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:31,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 32, 32] total 68 [2022-04-06 20:28:31,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:31,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1599421403] [2022-04-06 20:28:31,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1599421403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:31,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:31,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:28:31,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032740053] [2022-04-06 20:28:31,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:31,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:28:31,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:31,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:28:31,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=985, Invalid=3571, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:28:31,956 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:34,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:34,036 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2022-04-06 20:28:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:28:34,037 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-04-06 20:28:34,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:34,038 INFO L225 Difference]: With dead ends: 155 [2022-04-06 20:28:34,038 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 20:28:34,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1720, Invalid=7022, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:28:34,040 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 84 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 3526 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:34,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1150 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3526 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:28:34,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 20:28:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2022-04-06 20:28:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.006896551724138) internal successors, (146), 145 states have internal predecessors, (146), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2022-04-06 20:28:34,063 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 143 [2022-04-06 20:28:34,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:34,064 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2022-04-06 20:28:34,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:34,064 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2022-04-06 20:28:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-04-06 20:28:34,065 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:34,065 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:34,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:34,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:34,275 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:34,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2139133562, now seen corresponding path program 39 times [2022-04-06 20:28:34,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:34,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1478384932] [2022-04-06 20:28:34,277 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:28:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2139133562, now seen corresponding path program 40 times [2022-04-06 20:28:34,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:34,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921614246] [2022-04-06 20:28:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:34,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:35,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:35,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:35,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921614246] [2022-04-06 20:28:35,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921614246] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831302577] [2022-04-06 20:28:35,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:35,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:35,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:35,036 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:35,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:28:35,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:35,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:35,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:28:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:35,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:37,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831302577] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:37,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:37,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 33, 33] total 70 [2022-04-06 20:28:37,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:37,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1478384932] [2022-04-06 20:28:37,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1478384932] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:37,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:37,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:28:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116352573] [2022-04-06 20:28:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:37,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:28:37,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:28:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=3811, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:28:37,540 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 38 states, 38 states have (on average 3.8157894736842106) internal successors, (145), 37 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:39,795 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2022-04-06 20:28:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:28:39,796 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8157894736842106) internal successors, (145), 37 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-04-06 20:28:39,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:39,797 INFO L225 Difference]: With dead ends: 160 [2022-04-06 20:28:39,797 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 20:28:39,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1781, Invalid=7531, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:28:39,798 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 87 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 3769 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:39,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1222 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3769 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:28:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 20:28:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2022-04-06 20:28:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2022-04-06 20:28:39,814 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 148 [2022-04-06 20:28:39,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:39,814 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2022-04-06 20:28:39,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8157894736842106) internal successors, (145), 37 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:39,814 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2022-04-06 20:28:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 20:28:39,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:39,815 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:39,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:40,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 20:28:40,026 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:40,027 INFO L85 PathProgramCache]: Analyzing trace with hash 132411449, now seen corresponding path program 41 times [2022-04-06 20:28:40,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:40,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1260216906] [2022-04-06 20:28:40,027 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:28:40,027 INFO L85 PathProgramCache]: Analyzing trace with hash 132411449, now seen corresponding path program 42 times [2022-04-06 20:28:40,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:40,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88500860] [2022-04-06 20:28:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:40,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:40,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:40,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:40,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88500860] [2022-04-06 20:28:40,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88500860] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:40,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125648337] [2022-04-06 20:28:40,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:40,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:40,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:40,894 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:40,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:28:51,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:28:51,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:51,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 126 conjunts are in the unsatisfiable core [2022-04-06 20:28:51,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:14,212 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 20:29:14,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 25 select indices, 25 select index equivalence classes, 276 disjoint index pairs (out of 300 index pairs), introduced 25 new quantified variables, introduced 300 case distinctions, treesize of input 176 treesize of output 268 [2022-04-06 20:29:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 60 proven. 83 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2022-04-06 20:29:37,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2022-04-06 20:29:43,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125648337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:43,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:43,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 21, 20] total 76 [2022-04-06 20:29:43,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:43,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1260216906] [2022-04-06 20:29:43,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1260216906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:43,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:43,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:29:43,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038237075] [2022-04-06 20:29:43,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:43,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:29:43,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:29:43,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=5053, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:29:43,286 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:46,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:46,004 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2022-04-06 20:29:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:29:46,006 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-04-06 20:29:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:46,007 INFO L225 Difference]: With dead ends: 165 [2022-04-06 20:29:46,007 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 20:29:46,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 268 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=896, Invalid=9816, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:29:46,009 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 88 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 3901 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:46,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1259 Invalid, 3961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3901 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:29:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 20:29:46,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2022-04-06 20:29:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 155 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2022-04-06 20:29:46,024 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 153 [2022-04-06 20:29:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:46,025 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2022-04-06 20:29:46,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2022-04-06 20:29:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-04-06 20:29:46,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:46,026 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:46,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:46,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 20:29:46,231 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:46,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:46,232 INFO L85 PathProgramCache]: Analyzing trace with hash -689056294, now seen corresponding path program 43 times [2022-04-06 20:29:46,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:46,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2133825473] [2022-04-06 20:29:46,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:29:46,232 INFO L85 PathProgramCache]: Analyzing trace with hash -689056294, now seen corresponding path program 44 times [2022-04-06 20:29:46,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:46,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255037831] [2022-04-06 20:29:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:46,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:47,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:47,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:47,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255037831] [2022-04-06 20:29:47,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255037831] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:47,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692259105] [2022-04-06 20:29:47,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:47,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:47,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:47,068 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:47,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:29:47,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:47,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:29:47,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:48,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:49,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692259105] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:49,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:49,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 35, 35] total 74 [2022-04-06 20:29:49,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:49,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2133825473] [2022-04-06 20:29:49,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2133825473] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:49,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:49,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:29:49,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440721731] [2022-04-06 20:29:49,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:49,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:29:49,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:49,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:29:49,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=4321, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:29:49,908 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:52,445 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2022-04-06 20:29:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:29:52,446 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-04-06 20:29:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:52,447 INFO L225 Difference]: With dead ends: 170 [2022-04-06 20:29:52,447 INFO L226 Difference]: Without dead ends: 167 [2022-04-06 20:29:52,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1891, Invalid=8615, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:29:52,448 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 93 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 4396 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 4458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 4396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:52,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1392 Invalid, 4458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 4396 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:29:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-06 20:29:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2022-04-06 20:29:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2022-04-06 20:29:52,467 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 158 [2022-04-06 20:29:52,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:52,468 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2022-04-06 20:29:52,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:52,468 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2022-04-06 20:29:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 20:29:52,468 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:52,469 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:52,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:52,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:52,669 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:52,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:52,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1907870937, now seen corresponding path program 45 times [2022-04-06 20:29:52,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:52,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746317253] [2022-04-06 20:29:52,670 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:29:52,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1907870937, now seen corresponding path program 46 times [2022-04-06 20:29:52,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:52,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924765037] [2022-04-06 20:29:52,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:52,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:53,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:53,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:53,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924765037] [2022-04-06 20:29:53,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924765037] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:53,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657508445] [2022-04-06 20:29:53,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:53,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:53,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:53,504 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:53,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:29:54,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:54,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:29:54,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:54,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:56,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657508445] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:56,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:56,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36, 36] total 76 [2022-04-06 20:29:56,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:56,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746317253] [2022-04-06 20:29:56,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746317253] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:56,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:56,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:29:56,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755790781] [2022-04-06 20:29:56,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:56,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:29:56,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:29:56,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=4591, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:29:56,413 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:59,061 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2022-04-06 20:29:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:29:59,062 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-04-06 20:29:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:59,062 INFO L225 Difference]: With dead ends: 175 [2022-04-06 20:29:59,063 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 20:29:59,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1940, Invalid=9190, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:29:59,064 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 92 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 4543 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 4607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:59,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1441 Invalid, 4607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4543 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:29:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 20:29:59,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2022-04-06 20:29:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2022-04-06 20:29:59,081 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 163 [2022-04-06 20:29:59,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:59,081 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2022-04-06 20:29:59,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:59,082 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2022-04-06 20:29:59,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-04-06 20:29:59,082 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:59,083 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:59,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:59,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:59,307 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:59,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:59,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1478795974, now seen corresponding path program 47 times [2022-04-06 20:29:59,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:59,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1125075097] [2022-04-06 20:29:59,309 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:29:59,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1478795974, now seen corresponding path program 48 times [2022-04-06 20:29:59,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:59,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138107561] [2022-04-06 20:29:59,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:59,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:00,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:00,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:00,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138107561] [2022-04-06 20:30:00,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138107561] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:00,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466898606] [2022-04-06 20:30:00,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:30:00,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:00,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:00,262 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:00,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:30:01,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:30:01,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:01,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:30:01,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:01,779 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 20:30:01,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-04-06 20:30:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 69 proven. 95 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2022-04-06 20:30:01,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2022-04-06 20:30:05,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466898606] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:05,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:05,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 9, 9] total 56 [2022-04-06 20:30:05,528 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:05,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1125075097] [2022-04-06 20:30:05,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1125075097] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:05,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:05,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:30:05,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525673029] [2022-04-06 20:30:05,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:05,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:30:05,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:05,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:30:05,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2777, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:30:05,530 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 42 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 41 states have internal predecessors, (165), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:08,247 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2022-04-06 20:30:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:30:08,247 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 41 states have internal predecessors, (165), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-04-06 20:30:08,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:08,252 INFO L225 Difference]: With dead ends: 180 [2022-04-06 20:30:08,252 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 20:30:08,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=578, Invalid=6904, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:30:08,253 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 96 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 4816 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 4882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 4816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:08,253 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1515 Invalid, 4882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 4816 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:30:08,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 20:30:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-04-06 20:30:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2022-04-06 20:30:08,283 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 168 [2022-04-06 20:30:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:08,284 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2022-04-06 20:30:08,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 41 states have internal predecessors, (165), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:08,285 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2022-04-06 20:30:08,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 20:30:08,285 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:08,285 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:08,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:08,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 20:30:08,499 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash 787997049, now seen corresponding path program 49 times [2022-04-06 20:30:08,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:08,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [35696713] [2022-04-06 20:30:08,500 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:30:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash 787997049, now seen corresponding path program 50 times [2022-04-06 20:30:08,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:08,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929551072] [2022-04-06 20:30:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:08,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:09,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:09,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:09,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929551072] [2022-04-06 20:30:09,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929551072] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:09,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540822408] [2022-04-06 20:30:09,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:09,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:09,469 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:09,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:30:09,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:09,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:09,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:30:09,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:10,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:12,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540822408] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:12,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:12,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 38, 38] total 80 [2022-04-06 20:30:12,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:12,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [35696713] [2022-04-06 20:30:12,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [35696713] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:12,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:12,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:30:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278006121] [2022-04-06 20:30:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:12,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:30:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:12,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:30:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1158, Invalid=5162, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:30:12,562 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand has 43 states, 43 states have (on average 3.953488372093023) internal successors, (170), 42 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:15,395 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2022-04-06 20:30:15,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:30:15,396 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.953488372093023) internal successors, (170), 42 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-04-06 20:30:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:15,397 INFO L225 Difference]: With dead ends: 185 [2022-04-06 20:30:15,397 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 20:30:15,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2026, Invalid=10406, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:30:15,398 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 99 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 4831 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 4899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:15,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1521 Invalid, 4899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 4831 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:30:15,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 20:30:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2022-04-06 20:30:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 175 states have (on average 1.0057142857142858) internal successors, (176), 175 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2022-04-06 20:30:15,425 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 173 [2022-04-06 20:30:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:15,425 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2022-04-06 20:30:15,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.953488372093023) internal successors, (170), 42 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2022-04-06 20:30:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-04-06 20:30:15,426 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:15,426 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:15,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:15,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 20:30:15,651 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:15,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1687104666, now seen corresponding path program 51 times [2022-04-06 20:30:15,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:15,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [333688228] [2022-04-06 20:30:15,653 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:30:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1687104666, now seen corresponding path program 52 times [2022-04-06 20:30:15,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:15,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7728831] [2022-04-06 20:30:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:15,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:16,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:16,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:16,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7728831] [2022-04-06 20:30:16,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7728831] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:16,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622764743] [2022-04-06 20:30:16,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:16,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:16,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:16,596 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:16,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:30:17,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:17,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:17,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:30:17,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:17,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:19,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622764743] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:19,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:19,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 39, 39] total 82 [2022-04-06 20:30:19,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:19,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [333688228] [2022-04-06 20:30:19,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [333688228] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:19,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:19,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:30:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004889335] [2022-04-06 20:30:19,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:19,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:30:19,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:19,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:30:19,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=5463, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:30:19,842 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 44 states, 44 states have (on average 3.977272727272727) internal successors, (175), 43 states have internal predecessors, (175), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:22,960 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2022-04-06 20:30:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:30:22,960 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.977272727272727) internal successors, (175), 43 states have internal predecessors, (175), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-04-06 20:30:22,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:22,961 INFO L225 Difference]: With dead ends: 190 [2022-04-06 20:30:22,961 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 20:30:22,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2063, Invalid=11047, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:30:22,963 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 98 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 5389 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 5459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 5389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:22,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1678 Invalid, 5459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 5389 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:30:22,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 20:30:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-04-06 20:30:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 180 states have (on average 1.0055555555555555) internal successors, (181), 180 states have internal predecessors, (181), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2022-04-06 20:30:22,989 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 178 [2022-04-06 20:30:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:22,990 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2022-04-06 20:30:22,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.977272727272727) internal successors, (175), 43 states have internal predecessors, (175), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:22,990 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2022-04-06 20:30:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 20:30:22,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:22,991 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:23,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:23,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 20:30:23,203 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:23,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1226747417, now seen corresponding path program 53 times [2022-04-06 20:30:23,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:23,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203698896] [2022-04-06 20:30:23,205 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:30:23,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1226747417, now seen corresponding path program 54 times [2022-04-06 20:30:23,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:23,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310212398] [2022-04-06 20:30:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:23,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:24,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:24,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:24,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310212398] [2022-04-06 20:30:24,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310212398] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:24,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891598862] [2022-04-06 20:30:24,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:30:24,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:24,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:24,199 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:24,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:30:28,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:30:28,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:28,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 20:30:28,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:34,278 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 20:30:34,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 64 treesize of output 96 [2022-04-06 20:30:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 78 proven. 107 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2022-04-06 20:30:34,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2022-04-06 20:30:40,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891598862] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:40,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:40,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 22, 20] total 83 [2022-04-06 20:30:40,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:40,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203698896] [2022-04-06 20:30:40,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203698896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:40,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:40,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:30:40,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681158593] [2022-04-06 20:30:40,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:40,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:30:40,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:40,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:30:40,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=715, Invalid=6091, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:30:40,943 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand has 45 states, 45 states have (on average 4.0) internal successors, (180), 44 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:44,501 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2022-04-06 20:30:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:30:44,502 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.0) internal successors, (180), 44 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-04-06 20:30:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:44,504 INFO L225 Difference]: With dead ends: 195 [2022-04-06 20:30:44,504 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 20:30:44,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 326 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1031, Invalid=12541, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:30:44,505 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 99 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 5829 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 5901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 5829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:44,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1801 Invalid, 5901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 5829 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:30:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 20:30:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-04-06 20:30:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 185 states have (on average 1.0054054054054054) internal successors, (186), 185 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2022-04-06 20:30:44,543 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 183 [2022-04-06 20:30:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:44,543 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2022-04-06 20:30:44,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.0) internal successors, (180), 44 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2022-04-06 20:30:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-04-06 20:30:44,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:44,544 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:44,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:44,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 20:30:44,763 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:44,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash -540064774, now seen corresponding path program 55 times [2022-04-06 20:30:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:44,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094907565] [2022-04-06 20:30:44,764 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:30:44,764 INFO L85 PathProgramCache]: Analyzing trace with hash -540064774, now seen corresponding path program 56 times [2022-04-06 20:30:44,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:44,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914348911] [2022-04-06 20:30:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:44,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:45,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:45,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:45,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914348911] [2022-04-06 20:30:45,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914348911] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:45,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765432048] [2022-04-06 20:30:45,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:45,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:45,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:45,775 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:45,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:30:46,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:46,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:46,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1911 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:30:46,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:47,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:49,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765432048] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:49,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:49,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 41, 41] total 86 [2022-04-06 20:30:49,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:49,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094907565] [2022-04-06 20:30:49,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094907565] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:49,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:49,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:30:49,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186040102] [2022-04-06 20:30:49,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:49,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:30:49,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:49,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:30:49,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=6096, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:30:49,473 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 45 states have internal predecessors, (185), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:52,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:52,997 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2022-04-06 20:30:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:30:52,998 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 45 states have internal predecessors, (185), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-04-06 20:30:52,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:52,998 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:30:52,999 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 20:30:52,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2125, Invalid=12395, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:30:53,000 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 101 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 6139 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 6213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 6139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:53,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1887 Invalid, 6213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 6139 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 20:30:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 20:30:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-04-06 20:30:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2022-04-06 20:30:53,029 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 188 [2022-04-06 20:30:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:53,029 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2022-04-06 20:30:53,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 45 states have internal predecessors, (185), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2022-04-06 20:30:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 20:30:53,030 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:53,030 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:53,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:53,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:30:53,239 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1188678983, now seen corresponding path program 57 times [2022-04-06 20:30:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:53,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [752388591] [2022-04-06 20:30:53,241 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:30:53,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1188678983, now seen corresponding path program 58 times [2022-04-06 20:30:53,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:53,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556463960] [2022-04-06 20:30:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:53,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:54,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:54,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:54,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556463960] [2022-04-06 20:30:54,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556463960] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:54,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956872511] [2022-04-06 20:30:54,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:54,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:54,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:54,335 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:54,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:30:54,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:54,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:54,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:30:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:55,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:58,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956872511] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:58,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:58,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 42, 42] total 88 [2022-04-06 20:30:58,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:58,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [752388591] [2022-04-06 20:30:58,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [752388591] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:58,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:58,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:30:58,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783538625] [2022-04-06 20:30:58,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:58,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:30:58,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:58,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:30:58,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=6428, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:30:58,008 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand has 47 states, 47 states have (on average 4.042553191489362) internal successors, (190), 46 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:01,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:01,662 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2022-04-06 20:31:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:31:01,662 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.042553191489362) internal successors, (190), 46 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-04-06 20:31:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:01,663 INFO L225 Difference]: With dead ends: 205 [2022-04-06 20:31:01,663 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 20:31:01,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2150, Invalid=13102, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:31:01,665 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 107 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 6156 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 6232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 6156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:01,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1888 Invalid, 6232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 6156 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 20:31:01,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 20:31:01,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2022-04-06 20:31:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 195 states have (on average 1.005128205128205) internal successors, (196), 195 states have internal predecessors, (196), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2022-04-06 20:31:01,686 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 193 [2022-04-06 20:31:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:01,686 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2022-04-06 20:31:01,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.042553191489362) internal successors, (190), 46 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2022-04-06 20:31:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-04-06 20:31:01,687 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:01,687 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:01,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 20:31:01,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:01,887 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:01,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1394498726, now seen corresponding path program 59 times [2022-04-06 20:31:01,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:01,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1000848189] [2022-04-06 20:31:01,889 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:31:01,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1394498726, now seen corresponding path program 60 times [2022-04-06 20:31:01,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:01,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998191343] [2022-04-06 20:31:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:01,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:03,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 2265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:03,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:03,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998191343] [2022-04-06 20:31:03,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998191343] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:03,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065003945] [2022-04-06 20:31:03,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:31:03,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:03,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:03,017 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:03,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:31:03,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:31:03,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:31:03,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:04,365 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 20:31:04,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23