/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:06:50,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:06:50,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:06:50,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 08:06:50,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:06:50,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:06:50,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:06:50,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:06:50,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:06:50,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:06:50,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:06:50,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:06:50,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:06:50,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:06:50,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:06:50,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:06:50,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:06:50,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:06:50,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:06:50,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:06:50,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:06:50,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:06:50,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:06:50,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:06:50,461 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:06:50,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:06:50,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:06:50,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:06:50,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:06:50,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:06:50,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:06:50,462 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:06:50,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:06:50,462 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:06:50,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:06:50,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:06:50,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:06:50,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:06:50,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:06:50,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:06:50,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:06:50,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:06:50,464 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:06:50,464 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:06:50,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:06:50,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:06:50,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:06:50,711 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:06:50,712 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:06:50,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2022-01-31 08:06:50,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3503b5d1f/75b82c43b05d44c88bcd87f7697b2ae9/FLAG46a697c3a [2022-01-31 08:06:51,129 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:06:51,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2022-01-31 08:06:51,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3503b5d1f/75b82c43b05d44c88bcd87f7697b2ae9/FLAG46a697c3a [2022-01-31 08:06:51,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3503b5d1f/75b82c43b05d44c88bcd87f7697b2ae9 [2022-01-31 08:06:51,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:06:51,153 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:06:51,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:06:51,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:06:51,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:06:51,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51e620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:51, skipping insertion in model container [2022-01-31 08:06:51,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:06:51,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:06:51,304 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i[816,829] [2022-01-31 08:06:51,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:06:51,321 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:06:51,329 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i[816,829] [2022-01-31 08:06:51,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:06:51,342 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:06:51,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:51 WrapperNode [2022-01-31 08:06:51,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:06:51,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:06:51,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:06:51,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:06:51,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:06:51,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:06:51,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:06:51,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:06:51,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:06:51,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:51,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 08:06:51,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 08:06:51,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:06:51,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:06:51,433 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:06:51,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:06:51,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:06:51,433 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:06:51,433 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:06:51,433 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:06:51,433 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:06:51,433 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:06:51,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:06:51,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:06:51,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:06:51,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:06:51,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:06:51,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:06:51,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:06:51,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:06:51,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:06:51,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:06:51,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:06:51,501 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:06:51,514 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:06:51,647 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:06:51,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:06:51,651 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:06:51,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:06:51 BoogieIcfgContainer [2022-01-31 08:06:51,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:06:51,653 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:06:51,653 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:06:51,672 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:06:51,674 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:06:51" (1/1) ... [2022-01-31 08:06:51,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:06:51 BasicIcfg [2022-01-31 08:06:51,690 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:06:51,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:06:51,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:06:51,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:06:51,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:06:51" (1/4) ... [2022-01-31 08:06:51,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f4057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:06:51, skipping insertion in model container [2022-01-31 08:06:51,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:06:51" (2/4) ... [2022-01-31 08:06:51,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f4057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:06:51, skipping insertion in model container [2022-01-31 08:06:51,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:06:51" (3/4) ... [2022-01-31 08:06:51,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f4057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:06:51, skipping insertion in model container [2022-01-31 08:06:51,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:06:51" (4/4) ... [2022-01-31 08:06:51,704 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.iJordan [2022-01-31 08:06:51,708 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:06:51,708 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:06:51,750 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:06:51,757 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:06:51,757 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:06:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:06:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 08:06:51,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:51,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:51,782 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:51,785 INFO L85 PathProgramCache]: Analyzing trace with hash -839270659, now seen corresponding path program 1 times [2022-01-31 08:06:51,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:51,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659571702] [2022-01-31 08:06:51,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:51,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:51,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:06:51,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:51,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659571702] [2022-01-31 08:06:51,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659571702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:06:51,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:06:51,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:06:51,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192539588] [2022-01-31 08:06:51,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:06:51,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:06:51,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:06:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:06:52,007 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:52,035 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-01-31 08:06:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:06:52,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 08:06:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:52,042 INFO L225 Difference]: With dead ends: 27 [2022-01-31 08:06:52,042 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 08:06:52,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:06:52,048 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:52,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:06:52,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 08:06:52,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 08:06:52,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:06:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 08:06:52,077 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-01-31 08:06:52,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:52,077 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 08:06:52,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:52,078 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 08:06:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 08:06:52,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:52,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:52,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:06:52,079 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:52,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:52,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1759221441, now seen corresponding path program 1 times [2022-01-31 08:06:52,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:52,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017303789] [2022-01-31 08:06:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:52,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:52,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:06:52,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:52,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017303789] [2022-01-31 08:06:52,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017303789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:06:52,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:06:52,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:06:52,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836352435] [2022-01-31 08:06:52,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:06:52,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:06:52,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:52,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:06:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:06:52,177 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:52,228 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-01-31 08:06:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:06:52,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 08:06:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:52,230 INFO L225 Difference]: With dead ends: 26 [2022-01-31 08:06:52,230 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 08:06:52,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:06:52,236 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:52,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:06:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 08:06:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-01-31 08:06:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:06:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 08:06:52,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2022-01-31 08:06:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:52,240 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 08:06:52,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 08:06:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 08:06:52,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:52,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:52,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:06:52,241 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:52,242 INFO L85 PathProgramCache]: Analyzing trace with hash 852859995, now seen corresponding path program 1 times [2022-01-31 08:06:52,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:52,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621006265] [2022-01-31 08:06:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:52,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:52,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:06:52,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621006265] [2022-01-31 08:06:52,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621006265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493325026] [2022-01-31 08:06:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:52,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:52,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:52,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:06:52,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:06:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:52,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:06:52,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:06:52,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:06:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:06:52,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493325026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:06:52,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:06:52,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:06:52,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592441044] [2022-01-31 08:06:52,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:06:52,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:06:52,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:06:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:06:52,550 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:52,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:52,652 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-01-31 08:06:52,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:06:52,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 08:06:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:52,653 INFO L225 Difference]: With dead ends: 36 [2022-01-31 08:06:52,653 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 08:06:52,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:06:52,654 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:52,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 31 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:06:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 08:06:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 08:06:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:06:52,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-31 08:06:52,658 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 19 [2022-01-31 08:06:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:52,658 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-31 08:06:52,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-31 08:06:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 08:06:52,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:52,659 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:52,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 08:06:52,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:52,865 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:52,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1317253551, now seen corresponding path program 2 times [2022-01-31 08:06:52,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:52,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835558774] [2022-01-31 08:06:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:52,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:52,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:06:52,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:52,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835558774] [2022-01-31 08:06:52,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835558774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:52,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619913006] [2022-01-31 08:06:52,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:06:52,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:52,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:52,944 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:06:52,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:06:53,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:06:53,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:06:53,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:06:53,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:06:53,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:06:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:06:53,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619913006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:06:53,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:06:53,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 08:06:53,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051974267] [2022-01-31 08:06:53,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:06:53,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:06:53,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:06:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:06:53,195 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:53,477 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-01-31 08:06:53,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:06:53,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 08:06:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:53,478 INFO L225 Difference]: With dead ends: 60 [2022-01-31 08:06:53,478 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 08:06:53,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:06:53,479 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:53,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 36 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:06:53,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 08:06:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 08:06:53,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:06:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-01-31 08:06:53,484 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 31 [2022-01-31 08:06:53,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:53,484 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-01-31 08:06:53,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-01-31 08:06:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 08:06:53,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:53,485 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:53,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 08:06:53,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 08:06:53,704 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:53,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1386673577, now seen corresponding path program 3 times [2022-01-31 08:06:53,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:53,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205475232] [2022-01-31 08:06:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:53,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:53,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 08:06:53,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:53,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205475232] [2022-01-31 08:06:53,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205475232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:53,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958355470] [2022-01-31 08:06:53,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:06:53,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:53,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:53,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:06:53,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:06:53,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:06:53,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:06:53,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 08:06:53,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:53,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 08:06:54,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-01-31 08:06:54,264 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-31 08:06:54,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 16 [2022-01-31 08:06:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-01-31 08:06:54,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:06:54,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958355470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:06:54,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:06:54,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2022-01-31 08:06:54,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630468599] [2022-01-31 08:06:54,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:06:54,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 08:06:54,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:54,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 08:06:54,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-01-31 08:06:54,303 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:54,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:54,337 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2022-01-31 08:06:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 08:06:54,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 08:06:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:54,338 INFO L225 Difference]: With dead ends: 67 [2022-01-31 08:06:54,338 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 08:06:54,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-01-31 08:06:54,339 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:54,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-01-31 08:06:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 08:06:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-01-31 08:06:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:06:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-01-31 08:06:54,344 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 55 [2022-01-31 08:06:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:54,344 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-01-31 08:06:54,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:06:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-01-31 08:06:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:06:54,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:54,346 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:54,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:06:54,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:54,561 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:54,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:54,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1789377971, now seen corresponding path program 1 times [2022-01-31 08:06:54,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:54,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554287630] [2022-01-31 08:06:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:54,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:54,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:54,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 08:06:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-31 08:06:54,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:54,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554287630] [2022-01-31 08:06:54,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554287630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180884029] [2022-01-31 08:06:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:54,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:54,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:54,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:06:54,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:06:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:54,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:06:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-31 08:06:54,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:06:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-31 08:06:55,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180884029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:06:55,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:06:55,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 08:06:55,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747009203] [2022-01-31 08:06:55,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:06:55,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:06:55,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:55,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:06:55,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:06:55,145 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:06:55,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:55,666 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2022-01-31 08:06:55,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 08:06:55,667 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-01-31 08:06:55,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:55,671 INFO L225 Difference]: With dead ends: 114 [2022-01-31 08:06:55,671 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 08:06:55,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 08:06:55,675 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 155 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:55,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 31 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:06:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 08:06:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-01-31 08:06:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 106 states have (on average 1.028301886792453) internal successors, (109), 107 states have internal predecessors, (109), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:06:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2022-01-31 08:06:55,687 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 63 [2022-01-31 08:06:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:55,687 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2022-01-31 08:06:55,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:06:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2022-01-31 08:06:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 08:06:55,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:55,689 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:55,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:06:55,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:55,908 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:55,909 INFO L85 PathProgramCache]: Analyzing trace with hash 194337693, now seen corresponding path program 2 times [2022-01-31 08:06:55,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:55,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442678794] [2022-01-31 08:06:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:55,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:56,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:56,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-01-31 08:06:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-01-31 08:06:56,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:56,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442678794] [2022-01-31 08:06:56,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442678794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:56,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033793095] [2022-01-31 08:06:56,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:06:56,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:56,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:56,235 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:06:56,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:06:56,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:06:56,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:06:56,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 08:06:56,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2022-01-31 08:06:56,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:06:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-01-31 08:06:57,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033793095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:06:57,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:06:57,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 08:06:57,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894148659] [2022-01-31 08:06:57,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:06:57,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 08:06:57,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:06:57,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 08:06:57,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 08:06:57,363 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:06:58,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:06:58,554 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2022-01-31 08:06:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 08:06:58,555 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-01-31 08:06:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:06:58,556 INFO L225 Difference]: With dead ends: 210 [2022-01-31 08:06:58,556 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 08:06:58,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 08:06:58,559 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 324 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:06:58,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 36 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:06:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 08:06:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-01-31 08:06:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 203 states have internal predecessors, (205), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:06:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2022-01-31 08:06:58,568 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 111 [2022-01-31 08:06:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:06:58,569 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2022-01-31 08:06:58,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 49 states have internal predecessors, (114), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:06:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2022-01-31 08:06:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 08:06:58,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:06:58,571 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:06:58,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:06:58,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:58,790 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:06:58,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:06:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash 401763901, now seen corresponding path program 3 times [2022-01-31 08:06:58,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:06:58,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048801535] [2022-01-31 08:06:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:06:58,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:06:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:59,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:06:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:59,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-01-31 08:06:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:06:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4236 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2022-01-31 08:06:59,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:06:59,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048801535] [2022-01-31 08:06:59,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048801535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:06:59,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116742541] [2022-01-31 08:06:59,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:06:59,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:06:59,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:06:59,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:06:59,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:06:59,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 08:06:59,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:06:59,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 08:06:59,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:06:59,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 08:07:00,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-01-31 08:07:00,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:07:00,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 39 [2022-01-31 08:07:01,846 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (v_main_~i~0_134 Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (< v_main_~i~0_134 100000) (not (= |v_main_~#b~0.base_BEFORE_CALL_1| |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= 99999 v_main_~i~0_134) (= (select (select |c_#memory_int| |v_main_~#b~0.base_BEFORE_CALL_1|) (+ (- 4) (* 4 v_main_~i~0_134))) (select (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) (+ 400000 (* (- 4) v_main_~i~0_134)))))) is different from true [2022-01-31 08:07:02,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:07:02,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:07:02,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-01-31 08:07:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4236 backedges. 174 proven. 95 refuted. 0 times theorem prover too weak. 3965 trivial. 2 not checked. [2022-01-31 08:07:02,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:02,688 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-31 08:07:02,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 225 [2022-01-31 08:07:02,712 INFO L353 Elim1Store]: treesize reduction 39, result has 9.3 percent of original size [2022-01-31 08:07:02,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 896 treesize of output 752 [2022-01-31 08:07:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4236 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2022-01-31 08:07:04,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116742541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:04,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:04,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 15, 13] total 71 [2022-01-31 08:07:04,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972529970] [2022-01-31 08:07:04,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:04,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 08:07:04,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 08:07:04,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1506, Invalid=3327, Unknown=1, NotChecked=136, Total=4970 [2022-01-31 08:07:04,970 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand has 71 states, 70 states have (on average 2.1714285714285713) internal successors, (152), 69 states have internal predecessors, (152), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:07:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:11,958 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2022-01-31 08:07:11,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-31 08:07:11,958 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 2.1714285714285713) internal successors, (152), 69 states have internal predecessors, (152), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 207 [2022-01-31 08:07:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:11,960 INFO L225 Difference]: With dead ends: 231 [2022-01-31 08:07:11,960 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 08:07:11,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 440 SyntacticMatches, 5 SemanticMatches, 219 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13942 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=13661, Invalid=34522, Unknown=1, NotChecked=436, Total=48620 [2022-01-31 08:07:11,968 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 248 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:11,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 133 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 395 Invalid, 0 Unknown, 196 Unchecked, 0.5s Time] [2022-01-31 08:07:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 08:07:11,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 224. [2022-01-31 08:07:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 214 states have (on average 1.014018691588785) internal successors, (217), 215 states have internal predecessors, (217), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:07:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2022-01-31 08:07:11,977 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 207 [2022-01-31 08:07:11,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:11,977 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2022-01-31 08:07:11,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 2.1714285714285713) internal successors, (152), 69 states have internal predecessors, (152), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:07:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2022-01-31 08:07:11,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 08:07:11,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:11,979 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:12,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:12,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:12,200 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:12,200 INFO L85 PathProgramCache]: Analyzing trace with hash 175031629, now seen corresponding path program 4 times [2022-01-31 08:07:12,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:12,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686866725] [2022-01-31 08:07:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:12,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:13,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:13,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-01-31 08:07:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:13,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-01-31 08:07:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4529 backedges. 4 proven. 2209 refuted. 0 times theorem prover too weak. 2316 trivial. 0 not checked. [2022-01-31 08:07:13,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:13,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686866725] [2022-01-31 08:07:13,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686866725] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:13,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792753462] [2022-01-31 08:07:13,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:07:13,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:13,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:13,093 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:13,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:07:13,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:07:13,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:13,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 08:07:13,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4529 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 2320 trivial. 0 not checked. [2022-01-31 08:07:13,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4529 backedges. 4 proven. 2209 refuted. 0 times theorem prover too weak. 2316 trivial. 0 not checked. [2022-01-31 08:07:15,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792753462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:15,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:15,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-01-31 08:07:15,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072678806] [2022-01-31 08:07:15,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:15,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 08:07:15,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:15,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 08:07:15,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 08:07:15,980 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand has 100 states, 100 states have (on average 2.14) internal successors, (214), 99 states have internal predecessors, (214), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:07:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:20,070 INFO L93 Difference]: Finished difference Result 418 states and 420 transitions. [2022-01-31 08:07:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 08:07:20,070 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.14) internal successors, (214), 99 states have internal predecessors, (214), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 221 [2022-01-31 08:07:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:20,072 INFO L225 Difference]: With dead ends: 418 [2022-01-31 08:07:20,072 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 08:07:20,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2022-01-31 08:07:20,074 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 625 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:20,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 61 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 08:07:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 08:07:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2022-01-31 08:07:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 408 states have (on average 1.0073529411764706) internal successors, (411), 409 states have internal predecessors, (411), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:07:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 420 transitions. [2022-01-31 08:07:20,082 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 420 transitions. Word has length 221 [2022-01-31 08:07:20,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:20,082 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 420 transitions. [2022-01-31 08:07:20,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.14) internal successors, (214), 99 states have internal predecessors, (214), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:07:20,083 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 420 transitions. [2022-01-31 08:07:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-01-31 08:07:20,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:20,087 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:20,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:20,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:20,305 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:20,306 INFO L85 PathProgramCache]: Analyzing trace with hash 715259307, now seen corresponding path program 5 times [2022-01-31 08:07:20,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:20,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579370444] [2022-01-31 08:07:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:20,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:23,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:23,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 395 [2022-01-31 08:07:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:23,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 403 [2022-01-31 08:07:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18448 backedges. 4 proven. 9216 refuted. 0 times theorem prover too weak. 9228 trivial. 0 not checked. [2022-01-31 08:07:23,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:23,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579370444] [2022-01-31 08:07:23,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579370444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:23,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874096282] [2022-01-31 08:07:23,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:07:23,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:23,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:23,363 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:23,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process