/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:38:24,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:38:24,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:38:24,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:38:24,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:38:24,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:38:24,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:38:24,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:38:24,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:38:24,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:38:24,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:38:24,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:38:24,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:38:24,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:38:24,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:38:24,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:38:24,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:38:24,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:38:24,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:38:24,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:38:24,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:38:24,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:38:24,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:38:24,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:38:24,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:38:24,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 07:38:24,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 07:38:24,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 07:38:24,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 07:38:24,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 07:38:24,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 07:38:24,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 07:38:24,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 07:38:24,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:38:24,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:38:24,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:38:24,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:38:24,742 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:38:24,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:38:24,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:38:24,744 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:38:24,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:38:24,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:38:24,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:38:24,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:38:24,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:38:24,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:38:24,744 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:38:24,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:38:24,745 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:38:24,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:38:24,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:38:24,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:38:24,745 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:38:24,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:38:24,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:38:24,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:38:24,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:38:24,746 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:38:24,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:38:24,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:38:24,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:38:24,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:38:24,956 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:38:24,957 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:38:24,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2022-01-31 07:38:25,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/277e60de9/b67fcd3a99114e9c88360bff2842db23/FLAG9a1c8ead4 [2022-01-31 07:38:25,459 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:38:25,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2022-01-31 07:38:25,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/277e60de9/b67fcd3a99114e9c88360bff2842db23/FLAG9a1c8ead4 [2022-01-31 07:38:25,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/277e60de9/b67fcd3a99114e9c88360bff2842db23 [2022-01-31 07:38:25,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:38:25,880 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:38:25,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:38:25,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:38:25,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:38:25,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:38:25" (1/1) ... [2022-01-31 07:38:25,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a114ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:25, skipping insertion in model container [2022-01-31 07:38:25,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:38:25" (1/1) ... [2022-01-31 07:38:25,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:38:25,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:38:26,107 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i[816,829] [2022-01-31 07:38:26,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:38:26,137 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:38:26,146 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i[816,829] [2022-01-31 07:38:26,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:38:26,166 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:38:26,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:26 WrapperNode [2022-01-31 07:38:26,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:38:26,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:38:26,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:38:26,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:38:26,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:26" (1/1) ... [2022-01-31 07:38:26,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:26" (1/1) ... [2022-01-31 07:38:26,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:26" (1/1) ... [2022-01-31 07:38:26,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:26" (1/1) ... [2022-01-31 07:38:26,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:26" (1/1) ... [2022-01-31 07:38:26,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:26" (1/1) ... [2022-01-31 07:38:26,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:26" (1/1) ... [2022-01-31 07:38:26,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:38:26,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:38:26,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:38:26,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:38:26,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:26" (1/1) ... [2022-01-31 07:38:26,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:38:26,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:26,245 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 07:38:26,273 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 07:38:26,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:38:26,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:38:26,296 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:38:26,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:38:26,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:38:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:38:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:38:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:38:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:38:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:38:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:38:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:38:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:38:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:38:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:38:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:38:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:38:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:38:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:38:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:38:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:38:26,394 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:38:26,396 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:38:26,600 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:38:26,604 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:38:26,605 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-31 07:38:26,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:38:26 BoogieIcfgContainer [2022-01-31 07:38:26,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:38:26,607 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:38:26,607 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:38:26,624 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:38:26,627 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:38:26" (1/1) ... [2022-01-31 07:38:26,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:38:26 BasicIcfg [2022-01-31 07:38:26,644 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:38:26,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:38:26,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:38:26,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:38:26,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:38:25" (1/4) ... [2022-01-31 07:38:26,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f15af8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:38:26, skipping insertion in model container [2022-01-31 07:38:26,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:26" (2/4) ... [2022-01-31 07:38:26,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f15af8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:38:26, skipping insertion in model container [2022-01-31 07:38:26,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:38:26" (3/4) ... [2022-01-31 07:38:26,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f15af8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:38:26, skipping insertion in model container [2022-01-31 07:38:26,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:38:26" (4/4) ... [2022-01-31 07:38:26,673 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.iJordan [2022-01-31 07:38:26,677 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:38:26,678 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:38:26,730 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:38:26,736 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 07:38:26,736 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:38:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5) internal successors, (42), 29 states have internal predecessors, (42), 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 07:38:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 07:38:26,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:26,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:26,757 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:26,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:26,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1168688737, now seen corresponding path program 1 times [2022-01-31 07:38:26,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:26,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226358655] [2022-01-31 07:38:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:26,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:26,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:27,011 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 07:38:27,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:27,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226358655] [2022-01-31 07:38:27,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226358655] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:38:27,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:38:27,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:38:27,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687813933] [2022-01-31 07:38:27,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:38:27,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:38:27,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:38:27,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:38:27,055 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5) internal successors, (42), 29 states have internal predecessors, (42), 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 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 07:38:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:27,095 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-01-31 07:38:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:38:27,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 21 [2022-01-31 07:38:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:27,105 INFO L225 Difference]: With dead ends: 36 [2022-01-31 07:38:27,105 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 07:38:27,107 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 07:38:27,112 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 32 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 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 07:38:27,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:38:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 07:38:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-31 07:38:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 07:38:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-01-31 07:38:27,149 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2022-01-31 07:38:27,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:27,150 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-01-31 07:38:27,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 07:38:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-01-31 07:38:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 07:38:27,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:27,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:27,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:38:27,152 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:27,155 INFO L85 PathProgramCache]: Analyzing trace with hash 736021539, now seen corresponding path program 1 times [2022-01-31 07:38:27,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:27,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243541553] [2022-01-31 07:38:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:27,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:27,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:27,251 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 07:38:27,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:27,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243541553] [2022-01-31 07:38:27,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243541553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:38:27,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:38:27,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:38:27,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735128278] [2022-01-31 07:38:27,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:38:27,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:38:27,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:27,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:38:27,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:38:27,256 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 07:38:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:27,358 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-01-31 07:38:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:38:27,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 21 [2022-01-31 07:38:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:27,361 INFO L225 Difference]: With dead ends: 33 [2022-01-31 07:38:27,361 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 07:38:27,361 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 07:38:27,362 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:27,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 40 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:38:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 07:38:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-31 07:38:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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 07:38:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-01-31 07:38:27,368 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2022-01-31 07:38:27,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:27,369 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-01-31 07:38:27,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 07:38:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-01-31 07:38:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 07:38:27,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:27,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:27,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:38:27,370 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:27,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:27,376 INFO L85 PathProgramCache]: Analyzing trace with hash 90488769, now seen corresponding path program 1 times [2022-01-31 07:38:27,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:27,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260109709] [2022-01-31 07:38:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:27,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:27,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:38:27,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:27,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260109709] [2022-01-31 07:38:27,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260109709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:27,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652350554] [2022-01-31 07:38:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:27,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:27,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:27,491 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 07:38:27,493 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 07:38:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 07:38:27,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:38:27,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:38:27,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652350554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:38:27,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:38:27,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 07:38:27,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615632765] [2022-01-31 07:38:27,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:38:27,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:38:27,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:27,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:38:27,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:38:27,626 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:27,653 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-01-31 07:38:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:38:27,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 07:38:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:27,654 INFO L225 Difference]: With dead ends: 40 [2022-01-31 07:38:27,654 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 07:38:27,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:38:27,656 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:27,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 48 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:38:27,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 07:38:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-01-31 07:38:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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 07:38:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-01-31 07:38:27,661 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 23 [2022-01-31 07:38:27,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:27,662 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-01-31 07:38:27,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-01-31 07:38:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 07:38:27,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:27,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:27,695 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 07:38:27,878 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 07:38:27,879 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:27,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:27,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1333511417, now seen corresponding path program 1 times [2022-01-31 07:38:27,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:27,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876067951] [2022-01-31 07:38:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:27,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:27,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 07:38:27,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:27,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876067951] [2022-01-31 07:38:27,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876067951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:27,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905734843] [2022-01-31 07:38:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:27,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:27,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:27,985 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 07:38:27,986 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 07:38:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:28,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:38:28,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 07:38:28,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 07:38:28,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905734843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:28,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:28,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:38:28,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557896689] [2022-01-31 07:38:28,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:28,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:38:28,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:28,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:38:28,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:38:28,276 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:28,376 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-01-31 07:38:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:38:28,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 07:38:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:28,377 INFO L225 Difference]: With dead ends: 42 [2022-01-31 07:38:28,377 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 07:38:28,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 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 07:38:28,378 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:28,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:38:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 07:38:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-01-31 07:38:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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 07:38:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-01-31 07:38:28,383 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 31 [2022-01-31 07:38:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:28,383 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-01-31 07:38:28,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-01-31 07:38:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 07:38:28,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:28,384 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:28,416 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 07:38:28,607 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 07:38:28,608 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:28,608 INFO L85 PathProgramCache]: Analyzing trace with hash 397412563, now seen corresponding path program 2 times [2022-01-31 07:38:28,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:28,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170783848] [2022-01-31 07:38:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:28,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:28,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-31 07:38:28,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:28,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170783848] [2022-01-31 07:38:28,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170783848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:28,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766260805] [2022-01-31 07:38:28,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:38:28,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:28,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:28,675 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 07:38:28,695 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 07:38:28,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:38:28,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:38:28,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:38:28,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 07:38:28,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 07:38:29,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766260805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:29,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:29,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 07:38:29,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037290922] [2022-01-31 07:38:29,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:29,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 07:38:29,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:29,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 07:38:29,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 07:38:29,014 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 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 07:38:29,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:29,327 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2022-01-31 07:38:29,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 07:38:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 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 37 [2022-01-31 07:38:29,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:29,331 INFO L225 Difference]: With dead ends: 66 [2022-01-31 07:38:29,332 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 07:38:29,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-31 07:38:29,334 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:29,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 57 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:38:29,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 07:38:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2022-01-31 07:38:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 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 07:38:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-01-31 07:38:29,340 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 37 [2022-01-31 07:38:29,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:29,340 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-01-31 07:38:29,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 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 07:38:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-01-31 07:38:29,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 07:38:29,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:29,342 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:29,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 07:38:29,563 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 07:38:29,564 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:29,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:29,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1428200767, now seen corresponding path program 3 times [2022-01-31 07:38:29,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:29,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761446708] [2022-01-31 07:38:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:29,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:29,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:38:29,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761446708] [2022-01-31 07:38:29,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761446708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278799525] [2022-01-31 07:38:29,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:38:29,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:29,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:29,777 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 07:38:29,779 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 07:38:29,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 07:38:29,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:38:29,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 07:38:29,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 07:38:30,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 07:38:30,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278799525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:30,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:30,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-31 07:38:30,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081665593] [2022-01-31 07:38:30,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:30,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 07:38:30,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:30,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 07:38:30,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-31 07:38:30,124 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 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 07:38:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:30,505 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-01-31 07:38:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 07:38:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 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 57 [2022-01-31 07:38:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:30,509 INFO L225 Difference]: With dead ends: 97 [2022-01-31 07:38:30,509 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 07:38:30,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 07:38:30,511 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 119 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:30,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 42 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:38:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 07:38:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-01-31 07:38:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0666666666666667) internal successors, (96), 90 states have internal predecessors, (96), 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 07:38:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2022-01-31 07:38:30,528 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 57 [2022-01-31 07:38:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:30,529 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2022-01-31 07:38:30,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 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 07:38:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2022-01-31 07:38:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 07:38:30,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:30,530 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:30,548 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 07:38:30,735 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 07:38:30,736 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1051586883, now seen corresponding path program 4 times [2022-01-31 07:38:30,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:30,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393625105] [2022-01-31 07:38:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:30,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:30,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 07:38:30,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:30,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393625105] [2022-01-31 07:38:30,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393625105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:30,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504996118] [2022-01-31 07:38:30,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:38:30,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:30,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:30,946 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 07:38:30,948 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 07:38:31,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:38:31,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:38:31,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 07:38:31,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-01-31 07:38:31,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-01-31 07:38:31,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504996118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:31,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:31,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-01-31 07:38:31,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529608445] [2022-01-31 07:38:31,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:31,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 07:38:31,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:31,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 07:38:31,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-31 07:38:31,603 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 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 07:38:32,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:32,326 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2022-01-31 07:38:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 07:38:32,326 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 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 91 [2022-01-31 07:38:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:32,327 INFO L225 Difference]: With dead ends: 163 [2022-01-31 07:38:32,328 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 07:38:32,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 07:38:32,329 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 252 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:32,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 52 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 07:38:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 07:38:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-01-31 07:38:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.0384615384615385) internal successors, (162), 156 states have internal predecessors, (162), 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 07:38:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2022-01-31 07:38:32,337 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 91 [2022-01-31 07:38:32,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:32,338 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2022-01-31 07:38:32,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 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 07:38:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2022-01-31 07:38:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 07:38:32,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:32,344 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:32,364 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 07:38:32,545 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 07:38:32,545 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:32,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:32,546 INFO L85 PathProgramCache]: Analyzing trace with hash -347480677, now seen corresponding path program 5 times [2022-01-31 07:38:32,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:32,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989281854] [2022-01-31 07:38:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:32,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:32,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-01-31 07:38:32,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:32,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989281854] [2022-01-31 07:38:32,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989281854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:32,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982911317] [2022-01-31 07:38:32,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:38:32,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:32,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:32,789 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 07:38:32,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process