/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-industry-pattern/array_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:23:16,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:23:16,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:23:16,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 08:23:16,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:23:16,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:23:16,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:23:16,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:23:16,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:23:16,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:23:16,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:23:16,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:23:16,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:23:16,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:23:16,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:23:16,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:23:16,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:23:16,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:23:16,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:23:16,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:23:16,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:23:16,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:23:16,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:23:16,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:23:16,665 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:23:16,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:23:16,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:23:16,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:23:16,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:23:16,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:23:16,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:23:16,667 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:23:16,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:23:16,667 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:23:16,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:23:16,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:23:16,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:23:16,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:23:16,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:23:16,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:23:16,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:23:16,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:23:16,669 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:23:16,669 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:23:16,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:23:16,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:23:16,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:23:16,866 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:23:16,867 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:23:16,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2022-01-31 08:23:16,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e1cecc3/b05a7111e99d4a2e83ad12bf9f687ff8/FLAG6ec03ae75 [2022-01-31 08:23:17,304 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:23:17,304 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2022-01-31 08:23:17,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e1cecc3/b05a7111e99d4a2e83ad12bf9f687ff8/FLAG6ec03ae75 [2022-01-31 08:23:17,320 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e1cecc3/b05a7111e99d4a2e83ad12bf9f687ff8 [2022-01-31 08:23:17,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:23:17,323 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:23:17,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:23:17,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:23:17,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:23:17,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:23:17" (1/1) ... [2022-01-31 08:23:17,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdd80d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:17, skipping insertion in model container [2022-01-31 08:23:17,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:23:17" (1/1) ... [2022-01-31 08:23:17,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:23:17,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:23:17,502 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i[815,828] [2022-01-31 08:23:17,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:23:17,516 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:23:17,524 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i[815,828] [2022-01-31 08:23:17,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:23:17,538 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:23:17,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:17 WrapperNode [2022-01-31 08:23:17,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:23:17,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:23:17,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:23:17,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:23:17,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:17" (1/1) ... [2022-01-31 08:23:17,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:17" (1/1) ... [2022-01-31 08:23:17,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:17" (1/1) ... [2022-01-31 08:23:17,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:17" (1/1) ... [2022-01-31 08:23:17,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:17" (1/1) ... [2022-01-31 08:23:17,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:17" (1/1) ... [2022-01-31 08:23:17,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:17" (1/1) ... [2022-01-31 08:23:17,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:23:17,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:23:17,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:23:17,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:23:17,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:17" (1/1) ... [2022-01-31 08:23:17,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:23:17,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:17,608 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 08:23:17,614 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 08:23:17,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:23:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:23:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:23:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:23:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:23:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:23:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:23:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:23:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:23:17,658 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:23:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:23:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:23:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:23:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:23:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:23:17,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:23:17,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:23:17,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:23:17,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:23:17,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:23:17,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:23:17,712 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:23:17,713 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:23:17,847 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:23:17,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:23:17,851 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 08:23:17,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:23:17 BoogieIcfgContainer [2022-01-31 08:23:17,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:23:17,853 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:23:17,853 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:23:17,854 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:23:17,856 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:23:17" (1/1) ... [2022-01-31 08:23:17,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:23:17 BasicIcfg [2022-01-31 08:23:17,869 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:23:17,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:23:17,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:23:17,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:23:17,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:23:17" (1/4) ... [2022-01-31 08:23:17,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6438a5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:23:17, skipping insertion in model container [2022-01-31 08:23:17,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:17" (2/4) ... [2022-01-31 08:23:17,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6438a5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:23:17, skipping insertion in model container [2022-01-31 08:23:17,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:23:17" (3/4) ... [2022-01-31 08:23:17,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6438a5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:23:17, skipping insertion in model container [2022-01-31 08:23:17,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:23:17" (4/4) ... [2022-01-31 08:23:17,874 INFO L111 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.iJordan [2022-01-31 08:23:17,877 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:23:17,878 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:23:17,907 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:23:17,912 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 08:23:17,912 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:23:17,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 08:23:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 08:23:17,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:17,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:17,927 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:17,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:17,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1652866577, now seen corresponding path program 1 times [2022-01-31 08:23:17,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:17,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034285727] [2022-01-31 08:23:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:17,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:18,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:23:18,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034285727] [2022-01-31 08:23:18,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034285727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:18,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:23:18,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:23:18,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747128808] [2022-01-31 08:23:18,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:18,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:23:18,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:18,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:23:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:23:18,130 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 08:23:18,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:18,176 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-01-31 08:23:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:23:18,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 14 [2022-01-31 08:23:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:18,189 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:23:18,189 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 08:23:18,191 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 08:23:18,197 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 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 08:23:18,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:23:18,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 08:23:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 08:23:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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 08:23:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-01-31 08:23:18,232 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2022-01-31 08:23:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:18,232 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-01-31 08:23:18,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 08:23:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-01-31 08:23:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 08:23:18,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:18,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:18,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:23:18,235 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:18,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:18,243 INFO L85 PathProgramCache]: Analyzing trace with hash -899290384, now seen corresponding path program 1 times [2022-01-31 08:23:18,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:18,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215276657] [2022-01-31 08:23:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:18,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:18,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:18,377 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 08:23:18,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:18,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215276657] [2022-01-31 08:23:18,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215276657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:18,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:23:18,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:23:18,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617775119] [2022-01-31 08:23:18,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:18,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:23:18,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:18,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:23:18,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:23:18,381 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 08:23:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:18,477 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-01-31 08:23:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:23:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-01-31 08:23:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:18,480 INFO L225 Difference]: With dead ends: 33 [2022-01-31 08:23:18,480 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 08:23:18,485 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 08:23:18,487 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:18,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 25 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:18,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 08:23:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-01-31 08:23:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 08:23:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 08:23:18,498 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2022-01-31 08:23:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:18,499 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 08:23:18,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 08:23:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 08:23:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 08:23:18,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:18,509 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:18,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:23:18,509 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:18,510 INFO L85 PathProgramCache]: Analyzing trace with hash 847417356, now seen corresponding path program 1 times [2022-01-31 08:23:18,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:18,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492783754] [2022-01-31 08:23:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:18,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:18,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:23:18,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:18,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492783754] [2022-01-31 08:23:18,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492783754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:18,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283266346] [2022-01-31 08:23:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:18,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:18,622 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 08:23:18,651 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 08:23:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:23:18,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:23:18,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:23:18,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283266346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:18,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:18,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:23:18,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527287879] [2022-01-31 08:23:18,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:18,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:23:18,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:23:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:23:18,818 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 08:23:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:18,923 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2022-01-31 08:23:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:23:18,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 22 [2022-01-31 08:23:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:18,925 INFO L225 Difference]: With dead ends: 53 [2022-01-31 08:23:18,925 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 08:23:18,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:23:18,926 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:18,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 24 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 08:23:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-01-31 08:23:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 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 08:23:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2022-01-31 08:23:18,931 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 22 [2022-01-31 08:23:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:18,931 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2022-01-31 08:23:18,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 08:23:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2022-01-31 08:23:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 08:23:18,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:18,932 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:18,955 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 08:23:19,150 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 08:23:19,151 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1591201552, now seen corresponding path program 2 times [2022-01-31 08:23:19,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:19,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522526209] [2022-01-31 08:23:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:19,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:19,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:23:19,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522526209] [2022-01-31 08:23:19,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522526209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577337069] [2022-01-31 08:23:19,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:23:19,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:19,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:19,287 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 08:23:19,289 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 08:23:19,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:23:19,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:19,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:23:19,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:23:19,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:23:19,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577337069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:19,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:19,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-31 08:23:19,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082228997] [2022-01-31 08:23:19,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:19,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:23:19,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:23:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:23:19,589 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 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 08:23:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:19,888 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2022-01-31 08:23:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:23:19,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 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 40 [2022-01-31 08:23:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:19,891 INFO L225 Difference]: With dead ends: 107 [2022-01-31 08:23:19,891 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 08:23:19,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:23:19,892 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 278 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:19,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 34 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:23:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 08:23:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2022-01-31 08:23:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.3793103448275863) internal successors, (120), 87 states have internal predecessors, (120), 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 08:23:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2022-01-31 08:23:19,911 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 40 [2022-01-31 08:23:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:19,912 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2022-01-31 08:23:19,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 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 08:23:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2022-01-31 08:23:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 08:23:19,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:19,915 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:19,948 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 08:23:20,133 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 08:23:20,134 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:20,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1919314637, now seen corresponding path program 3 times [2022-01-31 08:23:20,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:20,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23341638] [2022-01-31 08:23:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:20,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:20,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-01-31 08:23:20,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:20,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23341638] [2022-01-31 08:23:20,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23341638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:20,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173693978] [2022-01-31 08:23:20,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:23:20,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:20,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:20,332 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 08:23:20,333 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 08:23:20,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 08:23:20,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:20,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 08:23:20,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:20,456 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 08:23:20,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-01-31 08:23:20,564 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 18 treesize of output 20 [2022-01-31 08:23:20,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-31 08:23:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-01-31 08:23:20,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:20,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:23:20,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-01-31 08:23:20,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-01-31 08:23:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-01-31 08:23:20,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173693978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:20,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:20,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2022-01-31 08:23:20,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800639629] [2022-01-31 08:23:20,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:20,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:23:20,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:20,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:23:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:23:20,810 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 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 08:23:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:21,224 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2022-01-31 08:23:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 08:23:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 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 79 [2022-01-31 08:23:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:21,225 INFO L225 Difference]: With dead ends: 137 [2022-01-31 08:23:21,225 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 08:23:21,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 08:23:21,226 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 282 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:21,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 43 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:23:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 08:23:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2022-01-31 08:23:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.3) internal successors, (143), 110 states have internal predecessors, (143), 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 08:23:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2022-01-31 08:23:21,231 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 79 [2022-01-31 08:23:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:21,232 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2022-01-31 08:23:21,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 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 08:23:21,232 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2022-01-31 08:23:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 08:23:21,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:21,233 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:21,262 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 08:23:21,450 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 08:23:21,451 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:21,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:21,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1791852656, now seen corresponding path program 1 times [2022-01-31 08:23:21,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:21,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009386171] [2022-01-31 08:23:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:21,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:21,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 08:23:21,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:21,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009386171] [2022-01-31 08:23:21,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009386171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:21,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494134367] [2022-01-31 08:23:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:21,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:21,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:21,568 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 08:23:21,569 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 08:23:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:21,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:23:21,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 08:23:21,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 08:23:22,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494134367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:22,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:22,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 08:23:22,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455249275] [2022-01-31 08:23:22,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:22,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:23:22,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:22,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:23:22,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:23:22,061 INFO L87 Difference]: Start difference. First operand 116 states and 148 transitions. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 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 08:23:22,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:22,661 INFO L93 Difference]: Finished difference Result 259 states and 337 transitions. [2022-01-31 08:23:22,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 08:23:22,661 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 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 82 [2022-01-31 08:23:22,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:22,663 INFO L225 Difference]: With dead ends: 259 [2022-01-31 08:23:22,663 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 08:23:22,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 154 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 08:23:22,664 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 709 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:22,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 49 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:23:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 08:23:22,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 227. [2022-01-31 08:23:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.3122171945701357) internal successors, (290), 221 states have internal predecessors, (290), 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 08:23:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 295 transitions. [2022-01-31 08:23:22,681 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 295 transitions. Word has length 82 [2022-01-31 08:23:22,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:22,682 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 295 transitions. [2022-01-31 08:23:22,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 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 08:23:22,682 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 295 transitions. [2022-01-31 08:23:22,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 08:23:22,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:22,685 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:22,703 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 08:23:22,899 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 08:23:22,900 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:22,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1742050995, now seen corresponding path program 2 times [2022-01-31 08:23:22,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:22,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717484996] [2022-01-31 08:23:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:22,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 08:23:23,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:23,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717484996] [2022-01-31 08:23:23,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717484996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:23,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720144059] [2022-01-31 08:23:23,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:23:23,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:23,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:23,336 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 08:23:23,336 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 08:23:23,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:23:23,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:23,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 08:23:23,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 08:23:23,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 08:23:24,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720144059] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:24,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:24,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 08:23:24,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075169122] [2022-01-31 08:23:24,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:24,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 08:23:24,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:24,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 08:23:24,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 08:23:24,523 INFO L87 Difference]: Start difference. First operand 227 states and 295 transitions. Second operand has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 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 08:23:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:26,134 INFO L93 Difference]: Finished difference Result 523 states and 685 transitions. [2022-01-31 08:23:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 08:23:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 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 157 [2022-01-31 08:23:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:26,136 INFO L225 Difference]: With dead ends: 523 [2022-01-31 08:23:26,136 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 08:23:26,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 292 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 08:23:26,139 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1452 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:26,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 44 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 08:23:26,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 08:23:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 455. [2022-01-31 08:23:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 449 states have (on average 1.3140311804008908) internal successors, (590), 449 states have internal predecessors, (590), 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 08:23:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 595 transitions. [2022-01-31 08:23:26,150 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 595 transitions. Word has length 157 [2022-01-31 08:23:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:26,151 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 595 transitions. [2022-01-31 08:23:26,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 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 08:23:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 595 transitions. [2022-01-31 08:23:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-31 08:23:26,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:26,154 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:26,174 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 08:23:26,371 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 08:23:26,372 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:26,372 INFO L85 PathProgramCache]: Analyzing trace with hash 813602829, now seen corresponding path program 3 times [2022-01-31 08:23:26,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:26,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520873122] [2022-01-31 08:23:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:26,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:27,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-01-31 08:23:27,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:27,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520873122] [2022-01-31 08:23:27,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520873122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:27,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881322789] [2022-01-31 08:23:27,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:23:27,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:27,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:27,374 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 08:23:27,375 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 08:23:28,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-01-31 08:23:28,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:28,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 08:23:28,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-31 08:23:28,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-31 08:23:29,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881322789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:29,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:29,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 26, 26] total 75 [2022-01-31 08:23:29,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027921255] [2022-01-31 08:23:29,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:29,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 08:23:29,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 08:23:29,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 08:23:29,508 INFO L87 Difference]: Start difference. First operand 455 states and 595 transitions. Second operand has 75 states, 75 states have (on average 5.253333333333333) internal successors, (394), 74 states have internal predecessors, (394), 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 08:23:31,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:31,972 INFO L93 Difference]: Finished difference Result 807 states and 1025 transitions. [2022-01-31 08:23:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 08:23:31,972 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 5.253333333333333) internal successors, (394), 74 states have internal predecessors, (394), 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 313 [2022-01-31 08:23:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:31,983 INFO L225 Difference]: With dead ends: 807 [2022-01-31 08:23:31,984 INFO L226 Difference]: Without dead ends: 807 [2022-01-31 08:23:31,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7958, Invalid=13212, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 08:23:31,988 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3085 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3086 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:31,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3086 Valid, 45 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 08:23:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-31 08:23:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 799. [2022-01-31 08:23:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 793 states have (on average 1.2723833543505674) internal successors, (1009), 793 states have internal predecessors, (1009), 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 08:23:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1014 transitions. [2022-01-31 08:23:31,999 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1014 transitions. Word has length 313 [2022-01-31 08:23:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:31,999 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 1014 transitions. [2022-01-31 08:23:32,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 5.253333333333333) internal successors, (394), 74 states have internal predecessors, (394), 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 08:23:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1014 transitions. [2022-01-31 08:23:32,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-01-31 08:23:32,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:32,006 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:32,026 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 08:23:32,225 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 08:23:32,226 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:32,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:32,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1003373139, now seen corresponding path program 4 times [2022-01-31 08:23:32,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:32,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13037506] [2022-01-31 08:23:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:32,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:33,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-01-31 08:23:33,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:33,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13037506] [2022-01-31 08:23:33,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13037506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:33,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540004517] [2022-01-31 08:23:33,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:23:33,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:33,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:33,603 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 08:23:33,604 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 08:23:33,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:23:33,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:33,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1520 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-31 08:23:33,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-01-31 08:23:34,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-01-31 08:23:38,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540004517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:38,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:38,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-01-31 08:23:38,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441888763] [2022-01-31 08:23:38,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:38,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 08:23:38,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:38,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 08:23:38,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 08:23:38,106 INFO L87 Difference]: Start difference. First operand 799 states and 1014 transitions. Second operand has 148 states, 148 states have (on average 4.9391891891891895) internal successors, (731), 147 states have internal predecessors, (731), 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 08:23:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:52,695 INFO L93 Difference]: Finished difference Result 1601 states and 2106 transitions. [2022-01-31 08:23:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 08:23:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 4.9391891891891895) internal successors, (731), 147 states have internal predecessors, (731), 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 582 [2022-01-31 08:23:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:52,725 INFO L225 Difference]: With dead ends: 1601 [2022-01-31 08:23:52,725 INFO L226 Difference]: Without dead ends: 1601 [2022-01-31 08:23:52,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13278 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=31902, Invalid=53070, Unknown=0, NotChecked=0, Total=84972 [2022-01-31 08:23:52,731 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6117 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 1199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6117 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1199 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:52,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6117 Valid, 49 Invalid, 2999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1199 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 08:23:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2022-01-31 08:23:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1386. [2022-01-31 08:23:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1380 states have (on average 1.315217391304348) internal successors, (1815), 1380 states have internal predecessors, (1815), 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 08:23:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 1820 transitions. [2022-01-31 08:23:52,748 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 1820 transitions. Word has length 582 [2022-01-31 08:23:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:52,749 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 1820 transitions. [2022-01-31 08:23:52,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 4.9391891891891895) internal successors, (731), 147 states have internal predecessors, (731), 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 08:23:52,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 1820 transitions. [2022-01-31 08:23:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2022-01-31 08:23:52,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:52,766 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 144, 144, 144, 73, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:52,786 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 08:23:52,986 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 08:23:52,986 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash -853843344, now seen corresponding path program 5 times [2022-01-31 08:23:52,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:52,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827814656] [2022-01-31 08:23:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:52,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:57,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 59436 backedges. 0 proven. 51624 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-01-31 08:23:57,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:57,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827814656] [2022-01-31 08:23:57,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827814656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:57,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153162074] [2022-01-31 08:23:57,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:23:57,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:57,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:57,557 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 08:23:57,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process