/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-crafted/zero_sum5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:56:34,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:56:34,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:56:34,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:56:34,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:56:34,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:56:34,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:56:34,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:56:34,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:56:34,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:56:34,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:56:34,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:56:34,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:56:34,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:56:34,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:56:34,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:56:34,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:56:34,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:56:34,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:56:34,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:56:34,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:56:34,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:56:34,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:56:34,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:56:34,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:56:34,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 09:56:34,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 09:56:34,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 09:56:34,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 09:56:34,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 09:56:34,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 09:56:34,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 09:56:34,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 09:56:34,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:56:34,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:56:34,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:56:34,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:56:34,493 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:56:34,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:56:34,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:56:34,495 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:56:34,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:56:34,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:56:34,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:56:34,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:56:34,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:56:34,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:56:34,496 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:56:34,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:56:34,496 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:56:34,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:56:34,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:56:34,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:56:34,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:56:34,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:56:34,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:56:34,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:56:34,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:56:34,498 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:56:34,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:56:34,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:56:34,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:56:34,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:56:34,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:56:34,676 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:56:34,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum5.c [2022-01-31 09:56:34,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347fe8096/b9cc9876ba694ecaae98345e0ef599a5/FLAG5e2366742 [2022-01-31 09:56:35,148 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:56:35,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum5.c [2022-01-31 09:56:35,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347fe8096/b9cc9876ba694ecaae98345e0ef599a5/FLAG5e2366742 [2022-01-31 09:56:35,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347fe8096/b9cc9876ba694ecaae98345e0ef599a5 [2022-01-31 09:56:35,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:56:35,553 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:56:35,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:56:35,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:56:35,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:56:35,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:56:35" (1/1) ... [2022-01-31 09:56:35,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30e67631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:56:35, skipping insertion in model container [2022-01-31 09:56:35,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:56:35" (1/1) ... [2022-01-31 09:56:35,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:56:35,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:56:35,696 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-crafted/zero_sum5.c[400,413] [2022-01-31 09:56:35,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:56:35,744 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:56:35,751 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-crafted/zero_sum5.c[400,413] [2022-01-31 09:56:35,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:56:35,767 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:56:35,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:56:35 WrapperNode [2022-01-31 09:56:35,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:56:35,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:56:35,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:56:35,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:56:35,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:56:35" (1/1) ... [2022-01-31 09:56:35,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:56:35" (1/1) ... [2022-01-31 09:56:35,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:56:35" (1/1) ... [2022-01-31 09:56:35,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:56:35" (1/1) ... [2022-01-31 09:56:35,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:56:35" (1/1) ... [2022-01-31 09:56:35,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:56:35" (1/1) ... [2022-01-31 09:56:35,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:56:35" (1/1) ... [2022-01-31 09:56:35,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:56:35,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:56:35,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:56:35,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:56:35,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:56:35" (1/1) ... [2022-01-31 09:56:35,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:56:35,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:56:35,852 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 09:56:35,871 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 09:56:35,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:56:35,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:56:35,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:56:35,898 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:56:35,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:56:35,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:56:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:56:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:56:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:56:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:56:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:56:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:56:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 09:56:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:56:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:56:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:56:35,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:56:35,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:56:35,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:56:35,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:56:35,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:56:35,963 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:56:35,965 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:56:36,202 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:56:36,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:56:36,207 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-01-31 09:56:36,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:56:36 BoogieIcfgContainer [2022-01-31 09:56:36,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:56:36,208 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:56:36,209 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:56:36,211 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:56:36,213 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:56:36" (1/1) ... [2022-01-31 09:56:36,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:56:36 BasicIcfg [2022-01-31 09:56:36,234 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:56:36,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:56:36,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:56:36,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:56:36,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:56:35" (1/4) ... [2022-01-31 09:56:36,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc7b266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:56:36, skipping insertion in model container [2022-01-31 09:56:36,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:56:35" (2/4) ... [2022-01-31 09:56:36,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc7b266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:56:36, skipping insertion in model container [2022-01-31 09:56:36,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:56:36" (3/4) ... [2022-01-31 09:56:36,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc7b266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:56:36, skipping insertion in model container [2022-01-31 09:56:36,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:56:36" (4/4) ... [2022-01-31 09:56:36,242 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum5.cJordan [2022-01-31 09:56:36,246 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:56:36,246 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:56:36,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:56:36,296 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 09:56:36,296 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:56:36,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 45 states have internal predecessors, (69), 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 09:56:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 09:56:36,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:56:36,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:56:36,320 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:56:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:56:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash 66783397, now seen corresponding path program 1 times [2022-01-31 09:56:36,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:56:36,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907012808] [2022-01-31 09:56:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:36,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:56:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:36,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:56:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:36,499 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 09:56:36,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:56:36,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907012808] [2022-01-31 09:56:36,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907012808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:56:36,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:56:36,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:56:36,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944674507] [2022-01-31 09:56:36,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:56:36,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:56:36,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:56:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:56:36,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:56:36,532 INFO L87 Difference]: Start difference. First operand has 52 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 45 states have internal predecessors, (69), 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 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 09:56:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:56:36,624 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-01-31 09:56:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:56:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 32 [2022-01-31 09:56:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:56:36,635 INFO L225 Difference]: With dead ends: 52 [2022-01-31 09:56:36,635 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 09:56:36,637 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 09:56:36,640 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:56:36,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 67 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:56:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 09:56:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 09:56:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 3 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 09:56:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-01-31 09:56:36,667 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2022-01-31 09:56:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:56:36,667 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-01-31 09:56:36,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 09:56:36,668 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-01-31 09:56:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 09:56:36,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:56:36,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:56:36,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:56:36,670 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:56:36,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:56:36,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1547302544, now seen corresponding path program 1 times [2022-01-31 09:56:36,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:56:36,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074486911] [2022-01-31 09:56:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:36,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:56:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:36,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:56:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:36,722 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 09:56:36,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:56:36,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074486911] [2022-01-31 09:56:36,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074486911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:56:36,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:56:36,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:56:36,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024982263] [2022-01-31 09:56:36,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:56:36,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:56:36,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:56:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:56:36,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:56:36,726 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 09:56:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:56:36,819 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-01-31 09:56:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:56:36,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 32 [2022-01-31 09:56:36,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:56:36,820 INFO L225 Difference]: With dead ends: 46 [2022-01-31 09:56:36,820 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 09:56:36,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:56:36,821 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:56:36,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 79 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:56:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 09:56:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-01-31 09:56:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 3 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 09:56:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-01-31 09:56:36,826 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 32 [2022-01-31 09:56:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:56:36,826 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-01-31 09:56:36,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 09:56:36,827 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-01-31 09:56:36,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 09:56:36,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:56:36,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:56:36,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:56:36,828 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:56:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:56:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash 730729805, now seen corresponding path program 1 times [2022-01-31 09:56:36,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:56:36,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52853045] [2022-01-31 09:56:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:36,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:56:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:36,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:56:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:36,899 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 09:56:36,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:56:36,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52853045] [2022-01-31 09:56:36,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52853045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:56:36,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:56:36,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:56:36,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601446115] [2022-01-31 09:56:36,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:56:36,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:56:36,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:56:36,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:56:36,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:56:36,904 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 09:56:37,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:56:37,031 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-01-31 09:56:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:56:37,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 34 [2022-01-31 09:56:37,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:56:37,033 INFO L225 Difference]: With dead ends: 65 [2022-01-31 09:56:37,033 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 09:56:37,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:56:37,038 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 67 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:56:37,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 29 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:56:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 09:56:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-01-31 09:56:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 3 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 09:56:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-01-31 09:56:37,055 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 34 [2022-01-31 09:56:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:56:37,055 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-01-31 09:56:37,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 09:56:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-01-31 09:56:37,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 09:56:37,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:56:37,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:56:37,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 09:56:37,056 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:56:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:56:37,057 INFO L85 PathProgramCache]: Analyzing trace with hash -353143719, now seen corresponding path program 1 times [2022-01-31 09:56:37,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:56:37,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887395794] [2022-01-31 09:56:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:37,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:56:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:37,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:56:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 09:56:37,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:56:37,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887395794] [2022-01-31 09:56:37,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887395794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:56:37,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704229861] [2022-01-31 09:56:37,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:37,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:56:37,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:56:37,127 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 09:56:37,133 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 09:56:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:37,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:56:37,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:56:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 09:56:37,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:56:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 09:56:37,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704229861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:56:37,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:56:37,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 09:56:37,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538125656] [2022-01-31 09:56:37,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:56:37,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:56:37,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:56:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:56:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:56:37,424 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 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 09:56:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:56:37,491 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-01-31 09:56:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:56:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 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 54 [2022-01-31 09:56:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:56:37,492 INFO L225 Difference]: With dead ends: 58 [2022-01-31 09:56:37,492 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 09:56:37,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:56:37,493 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:56:37,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 129 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:56:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 09:56:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-01-31 09:56:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 3 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 09:56:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-01-31 09:56:37,497 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2022-01-31 09:56:37,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:56:37,497 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-01-31 09:56:37,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 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 09:56:37,497 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-01-31 09:56:37,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:56:37,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:56:37,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:56:37,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 09:56:37,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:56:37,717 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:56:37,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:56:37,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1906801546, now seen corresponding path program 2 times [2022-01-31 09:56:37,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:56:37,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823409692] [2022-01-31 09:56:37,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:37,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:56:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:37,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:56:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 09:56:37,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:56:37,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823409692] [2022-01-31 09:56:37,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823409692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:56:37,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231520973] [2022-01-31 09:56:37,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:56:37,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:56:37,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:56:37,776 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 09:56:37,783 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 09:56:37,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:56:37,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:56:37,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:56:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:56:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 09:56:37,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:56:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 09:56:38,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231520973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:56:38,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:56:38,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-31 09:56:38,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415225419] [2022-01-31 09:56:38,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:56:38,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 09:56:38,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:56:38,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 09:56:38,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:56:38,082 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 8 states have internal predecessors, (79), 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 09:56:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:56:38,174 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2022-01-31 09:56:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 09:56:38,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 8 states have internal predecessors, (79), 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 56 [2022-01-31 09:56:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:56:38,175 INFO L225 Difference]: With dead ends: 87 [2022-01-31 09:56:38,176 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 09:56:38,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-31 09:56:38,176 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:56:38,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 38 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:56:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 09:56:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2022-01-31 09:56:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 3 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 09:56:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2022-01-31 09:56:38,180 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56 [2022-01-31 09:56:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:56:38,181 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2022-01-31 09:56:38,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 8 states have internal predecessors, (79), 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 09:56:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2022-01-31 09:56:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 09:56:38,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:56:38,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:56:38,218 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 09:56:38,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:56:38,400 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:56:38,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:56:38,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1307276546, now seen corresponding path program 3 times [2022-01-31 09:56:38,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:56:38,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787715555] [2022-01-31 09:56:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:56:38,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:56:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:39,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:56:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:56:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:56:39,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:56:39,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787715555] [2022-01-31 09:56:39,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787715555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:56:39,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345050921] [2022-01-31 09:56:39,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:56:39,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:56:39,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:56:39,787 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 09:56:39,839 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 09:56:39,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:56:39,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:56:39,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 101 conjunts are in the unsatisfiable core [2022-01-31 09:56:39,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:56:41,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:56:41,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:56:41,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2022-01-31 09:56:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:56:41,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:56:54,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:56:54,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2022-01-31 09:56:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:56:57,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345050921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:56:57,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:56:57,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 30] total 63 [2022-01-31 09:56:57,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757678134] [2022-01-31 09:56:57,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:56:57,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 09:56:57,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:56:57,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 09:56:57,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=3556, Unknown=3, NotChecked=0, Total=3906 [2022-01-31 09:56:57,759 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 63 states, 63 states have (on average 3.2857142857142856) internal successors, (207), 60 states have internal predecessors, (207), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:57:00,625 INFO L93 Difference]: Finished difference Result 263 states and 305 transitions. [2022-01-31 09:57:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 09:57:00,625 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.2857142857142856) internal successors, (207), 60 states have internal predecessors, (207), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 09:57:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:57:00,628 INFO L225 Difference]: With dead ends: 263 [2022-01-31 09:57:00,628 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 09:57:00,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 111 SyntacticMatches, 51 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3949 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=885, Invalid=8814, Unknown=3, NotChecked=0, Total=9702 [2022-01-31 09:57:00,631 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 137 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1365 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:57:00,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 291 Invalid, 2259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 810 Invalid, 0 Unknown, 1365 Unchecked, 0.4s Time] [2022-01-31 09:57:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 09:57:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 130. [2022-01-31 09:57:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.16) internal successors, (145), 125 states have internal predecessors, (145), 3 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 09:57:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2022-01-31 09:57:00,638 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2022-01-31 09:57:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:57:00,639 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2022-01-31 09:57:00,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.2857142857142856) internal successors, (207), 60 states have internal predecessors, (207), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:57:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2022-01-31 09:57:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 09:57:00,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:57:00,640 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:57:00,657 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 09:57:00,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:00,854 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:57:00,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:57:00,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1221255424, now seen corresponding path program 4 times [2022-01-31 09:57:00,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:57:00,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558445992] [2022-01-31 09:57:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:57:00,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:57:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:00,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:57:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:57:00,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:57:00,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558445992] [2022-01-31 09:57:00,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558445992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:57:00,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116302163] [2022-01-31 09:57:00,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:57:00,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:57:00,977 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 09:57:00,981 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 09:57:01,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:57:01,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:57:01,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:57:01,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:57:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:57:01,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:57:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:57:01,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116302163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:57:01,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:57:01,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 09:57:01,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854135157] [2022-01-31 09:57:01,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:57:01,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:57:01,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:57:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:57:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:57:01,342 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 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 09:57:01,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:57:01,542 INFO L93 Difference]: Finished difference Result 193 states and 212 transitions. [2022-01-31 09:57:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:57:01,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 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 78 [2022-01-31 09:57:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:57:01,546 INFO L225 Difference]: With dead ends: 193 [2022-01-31 09:57:01,546 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 09:57:01,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:57:01,547 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 133 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:57:01,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 130 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:57:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 09:57:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-01-31 09:57:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 127 states have internal predecessors, (147), 3 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 09:57:01,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2022-01-31 09:57:01,571 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 78 [2022-01-31 09:57:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:57:01,573 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2022-01-31 09:57:01,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 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 09:57:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2022-01-31 09:57:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 09:57:01,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:57:01,577 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:57:01,594 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 09:57:01,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:01,778 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:57:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:57:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1176311779, now seen corresponding path program 5 times [2022-01-31 09:57:01,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:57:01,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145212493] [2022-01-31 09:57:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:57:01,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:57:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:01,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:57:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-31 09:57:01,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:57:01,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145212493] [2022-01-31 09:57:01,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145212493] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:57:01,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417959513] [2022-01-31 09:57:01,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:57:01,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:01,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:57:01,879 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 09:57:01,880 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 09:57:01,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 09:57:01,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:57:01,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:57:01,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:57:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-31 09:57:02,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:57:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-31 09:57:02,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417959513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:57:02,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:57:02,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-31 09:57:02,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683216051] [2022-01-31 09:57:02,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:57:02,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 09:57:02,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:57:02,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 09:57:02,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:57:02,251 INFO L87 Difference]: Start difference. First operand 132 states and 151 transitions. Second operand has 20 states, 20 states have (on average 5.55) internal successors, (111), 19 states have internal predecessors, (111), 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 09:57:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:57:02,612 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2022-01-31 09:57:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:57:02,612 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.55) internal successors, (111), 19 states have internal predecessors, (111), 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 80 [2022-01-31 09:57:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:57:02,613 INFO L225 Difference]: With dead ends: 109 [2022-01-31 09:57:02,613 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 09:57:02,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-01-31 09:57:02,614 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 229 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:57:02,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 77 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:57:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 09:57:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2022-01-31 09:57:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 3 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 09:57:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2022-01-31 09:57:02,617 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 80 [2022-01-31 09:57:02,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:57:02,617 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2022-01-31 09:57:02,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.55) internal successors, (111), 19 states have internal predecessors, (111), 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 09:57:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2022-01-31 09:57:02,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 09:57:02,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:57:02,618 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:57:02,638 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 09:57:02,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:02,827 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:57:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:57:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash -317654165, now seen corresponding path program 6 times [2022-01-31 09:57:02,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:57:02,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42786340] [2022-01-31 09:57:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:57:02,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:57:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:05,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:57:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:57:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:57:05,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:57:05,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42786340] [2022-01-31 09:57:05,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42786340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:57:05,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767426988] [2022-01-31 09:57:05,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:57:05,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:57:05,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:57:05,328 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 09:57:05,329 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 09:57:05,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 09:57:05,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:57:05,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 137 conjunts are in the unsatisfiable core [2022-01-31 09:57:05,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:57:05,456 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 09:57:07,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:57:07,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:57:07,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:57:07,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 49 [2022-01-31 09:57:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:57:07,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:57:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:57:43,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767426988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:57:43,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:57:43,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 37, 40] total 106 [2022-01-31 09:57:43,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114275129] [2022-01-31 09:57:43,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:57:43,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 09:57:43,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:57:43,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 09:57:43,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=10359, Unknown=7, NotChecked=0, Total=11130 [2022-01-31 09:57:43,247 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 106 states, 106 states have (on average 2.490566037735849) internal successors, (264), 103 states have internal predecessors, (264), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:04,357 WARN L228 SmtUtils]: Spent 7.16s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 09:59:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:04,695 INFO L93 Difference]: Finished difference Result 247 states and 275 transitions. [2022-01-31 09:59:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 09:59:04,696 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.490566037735849) internal successors, (264), 103 states have internal predecessors, (264), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 09:59:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:04,697 INFO L225 Difference]: With dead ends: 247 [2022-01-31 09:59:04,697 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 09:59:04,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 140 SyntacticMatches, 30 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6275 ImplicationChecksByTransitivity, 116.0s TimeCoverageRelationStatistics Valid=988, Invalid=15238, Unknown=30, NotChecked=0, Total=16256 [2022-01-31 09:59:04,700 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 3840 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 7473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 3840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3162 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:04,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 398 Invalid, 7473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 3840 Invalid, 0 Unknown, 3162 Unchecked, 2.0s Time] [2022-01-31 09:59:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 09:59:04,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 172. [2022-01-31 09:59:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.1317365269461077) internal successors, (189), 167 states have internal predecessors, (189), 3 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 09:59:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 193 transitions. [2022-01-31 09:59:04,707 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 193 transitions. Word has length 98 [2022-01-31 09:59:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:04,707 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 193 transitions. [2022-01-31 09:59:04,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.490566037735849) internal successors, (264), 103 states have internal predecessors, (264), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 193 transitions. [2022-01-31 09:59:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 09:59:04,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:04,708 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:04,731 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 09:59:04,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:04,923 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:04,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:04,924 INFO L85 PathProgramCache]: Analyzing trace with hash 588427049, now seen corresponding path program 7 times [2022-01-31 09:59:04,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:04,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12255120] [2022-01-31 09:59:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:04,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:05,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 09:59:05,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:05,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12255120] [2022-01-31 09:59:05,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12255120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:05,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921881433] [2022-01-31 09:59:05,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:59:05,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:05,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:05,008 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 09:59:05,009 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 09:59:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:59:05,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 09:59:05,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 09:59:05,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921881433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:05,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:05,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 09:59:05,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139129456] [2022-01-31 09:59:05,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:05,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:59:05,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:05,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:59:05,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:59:05,444 INFO L87 Difference]: Start difference. First operand 172 states and 193 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 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 09:59:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:05,817 INFO L93 Difference]: Finished difference Result 255 states and 276 transitions. [2022-01-31 09:59:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:59:05,817 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 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 100 [2022-01-31 09:59:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:05,818 INFO L225 Difference]: With dead ends: 255 [2022-01-31 09:59:05,818 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 09:59:05,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:59:05,819 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:05,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 130 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:59:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 09:59:05,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-01-31 09:59:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.1301775147928994) internal successors, (191), 169 states have internal predecessors, (191), 3 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 09:59:05,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 195 transitions. [2022-01-31 09:59:05,822 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 195 transitions. Word has length 100 [2022-01-31 09:59:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:05,822 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 195 transitions. [2022-01-31 09:59:05,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 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 09:59:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 195 transitions. [2022-01-31 09:59:05,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 09:59:05,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:05,823 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:05,855 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 09:59:06,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:06,024 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:06,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:06,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1896737658, now seen corresponding path program 8 times [2022-01-31 09:59:06,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:06,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188778062] [2022-01-31 09:59:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:06,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:06,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-31 09:59:06,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:06,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188778062] [2022-01-31 09:59:06,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188778062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:06,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685040091] [2022-01-31 09:59:06,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:59:06,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:06,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:06,124 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 09:59:06,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:59:06,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:59:06,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:06,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:59:06,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-31 09:59:06,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-31 09:59:06,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685040091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:06,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:06,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 09:59:06,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363123429] [2022-01-31 09:59:06,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:06,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:59:06,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:06,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:59:06,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:59:06,513 INFO L87 Difference]: Start difference. First operand 174 states and 195 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 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 09:59:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:06,823 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2022-01-31 09:59:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:59:06,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 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 102 [2022-01-31 09:59:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:06,824 INFO L225 Difference]: With dead ends: 131 [2022-01-31 09:59:06,824 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 09:59:06,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-01-31 09:59:06,825 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 320 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:06,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 63 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:59:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 09:59:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-01-31 09:59:06,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 116 states have internal predecessors, (127), 3 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 09:59:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2022-01-31 09:59:06,828 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 102 [2022-01-31 09:59:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:06,828 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2022-01-31 09:59:06,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 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 09:59:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2022-01-31 09:59:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 09:59:06,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:06,829 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:06,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 09:59:07,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 09:59:07,047 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:07,047 INFO L85 PathProgramCache]: Analyzing trace with hash 898824084, now seen corresponding path program 9 times [2022-01-31 09:59:07,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:07,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731460100] [2022-01-31 09:59:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:07,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:12,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 2 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:59:12,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:12,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731460100] [2022-01-31 09:59:12,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731460100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:12,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453072775] [2022-01-31 09:59:12,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:59:12,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:12,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:12,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:12,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:59:12,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 09:59:12,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:12,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 184 conjunts are in the unsatisfiable core [2022-01-31 09:59:12,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:12,353 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 09:59:22,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:22,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:59:22,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:59:22,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 59 [2022-01-31 09:59:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 7 proven. 160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:59:22,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:59:33,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453072775] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:33,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:33,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 27, 24] total 112 [2022-01-31 09:59:33,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029510487] [2022-01-31 09:59:33,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:33,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 09:59:33,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 09:59:33,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=11761, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 09:59:33,998 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 112 states, 112 states have (on average 2.9017857142857144) internal successors, (325), 109 states have internal predecessors, (325), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:52,058 INFO L93 Difference]: Finished difference Result 294 states and 323 transitions. [2022-01-31 09:59:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 09:59:52,059 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.9017857142857144) internal successors, (325), 109 states have internal predecessors, (325), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 09:59:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:52,060 INFO L225 Difference]: With dead ends: 294 [2022-01-31 09:59:52,060 INFO L226 Difference]: Without dead ends: 291 [2022-01-31 09:59:52,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 183 SyntacticMatches, 49 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12769 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=2439, Invalid=38161, Unknown=2, NotChecked=0, Total=40602 [2022-01-31 09:59:52,065 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 82 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 3435 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 5792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 3435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1917 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:52,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 466 Invalid, 5792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 3435 Invalid, 0 Unknown, 1917 Unchecked, 1.9s Time] [2022-01-31 09:59:52,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-01-31 09:59:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 240. [2022-01-31 09:59:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.1063829787234043) internal successors, (260), 235 states have internal predecessors, (260), 3 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 09:59:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 264 transitions. [2022-01-31 09:59:52,071 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 264 transitions. Word has length 120 [2022-01-31 09:59:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:52,071 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 264 transitions. [2022-01-31 09:59:52,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.9017857142857144) internal successors, (325), 109 states have internal predecessors, (325), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:59:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 264 transitions. [2022-01-31 09:59:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 09:59:52,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:52,072 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:52,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:59:52,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:52,291 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1392919826, now seen corresponding path program 10 times [2022-01-31 09:59:52,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:52,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779300901] [2022-01-31 09:59:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:52,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:52,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 09:59:52,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779300901] [2022-01-31 09:59:52,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779300901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574555335] [2022-01-31 09:59:52,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:59:52,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:52,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:52,425 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:52,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:59:52,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:59:52,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:52,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:59:52,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 09:59:52,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 09:59:52,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574555335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:52,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:52,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 09:59:52,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260391836] [2022-01-31 09:59:52,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:52,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 09:59:52,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 09:59:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-01-31 09:59:52,995 INFO L87 Difference]: Start difference. First operand 240 states and 264 transitions. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 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 09:59:53,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:53,444 INFO L93 Difference]: Finished difference Result 309 states and 328 transitions. [2022-01-31 09:59:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:59:53,444 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 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 122 [2022-01-31 09:59:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:53,445 INFO L225 Difference]: With dead ends: 309 [2022-01-31 09:59:53,445 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 09:59:53,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-01-31 09:59:53,446 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:53,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 130 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 09:59:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 09:59:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-01-31 09:59:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 203 states have internal predecessors, (223), 3 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 09:59:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 227 transitions. [2022-01-31 09:59:53,451 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 227 transitions. Word has length 122 [2022-01-31 09:59:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:53,451 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 227 transitions. [2022-01-31 09:59:53,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 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 09:59:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 227 transitions. [2022-01-31 09:59:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 09:59:53,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:53,452 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:53,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:59:53,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 09:59:53,669 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:53,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2095016273, now seen corresponding path program 11 times [2022-01-31 09:59:53,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:53,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185778781] [2022-01-31 09:59:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:53,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:53,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:59:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:59:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-01-31 09:59:53,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:59:53,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185778781] [2022-01-31 09:59:53,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185778781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:59:53,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538727782] [2022-01-31 09:59:53,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:59:53,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:59:53,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:59:53,793 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:59:53,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:59:54,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 09:59:54,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:59:54,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:59:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:59:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-01-31 09:59:54,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:59:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-01-31 09:59:54,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538727782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:59:54,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:59:54,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 09:59:54,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023733944] [2022-01-31 09:59:54,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:59:54,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 09:59:54,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:59:54,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 09:59:54,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-01-31 09:59:54,599 INFO L87 Difference]: Start difference. First operand 208 states and 227 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 20 states have internal predecessors, (104), 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 09:59:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:59:54,989 INFO L93 Difference]: Finished difference Result 153 states and 163 transitions. [2022-01-31 09:59:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 09:59:54,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 20 states have internal predecessors, (104), 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 124 [2022-01-31 09:59:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:59:54,990 INFO L225 Difference]: With dead ends: 153 [2022-01-31 09:59:54,990 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 09:59:54,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=598, Unknown=0, NotChecked=0, Total=812 [2022-01-31 09:59:54,991 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 388 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:59:54,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 81 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:59:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 09:59:54,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 143. [2022-01-31 09:59:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 3 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 09:59:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2022-01-31 09:59:54,994 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 124 [2022-01-31 09:59:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:59:54,994 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2022-01-31 09:59:54,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 20 states have internal predecessors, (104), 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 09:59:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2022-01-31 09:59:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 09:59:54,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:59:54,995 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:59:55,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 09:59:55,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 09:59:55,203 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:59:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:59:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1335076483, now seen corresponding path program 12 times [2022-01-31 09:59:55,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:59:55,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505388196] [2022-01-31 09:59:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:59:55,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:59:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:01,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:00:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 18 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:00:01,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:00:01,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505388196] [2022-01-31 10:00:01,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505388196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:00:01,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185216470] [2022-01-31 10:00:01,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:00:01,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:01,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:00:01,923 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:00:01,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 10:00:02,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 10:00:02,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:00:02,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 230 conjunts are in the unsatisfiable core [2022-01-31 10:00:02,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:00:02,129 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 10:00:08,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:00:08,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2022-01-31 10:00:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 3 proven. 271 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:00:08,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:00:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:00:23,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185216470] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:00:23,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:00:23,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 34, 28] total 125 [2022-01-31 10:00:23,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087145836] [2022-01-31 10:00:23,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:00:23,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 10:00:23,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:00:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 10:00:23,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=14786, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 10:00:23,515 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 125 states, 125 states have (on average 3.08) internal successors, (385), 122 states have internal predecessors, (385), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:00:37,723 INFO L93 Difference]: Finished difference Result 283 states and 305 transitions. [2022-01-31 10:00:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 10:00:37,724 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 3.08) internal successors, (385), 122 states have internal predecessors, (385), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 10:00:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:00:37,725 INFO L225 Difference]: With dead ends: 283 [2022-01-31 10:00:37,725 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 10:00:37,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 219 SyntacticMatches, 77 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16036 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=2184, Invalid=40046, Unknown=0, NotChecked=0, Total=42230 [2022-01-31 10:00:37,728 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 3503 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 6989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 3503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3060 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:00:37,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 537 Invalid, 6989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 3503 Invalid, 0 Unknown, 3060 Unchecked, 2.1s Time] [2022-01-31 10:00:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 10:00:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 208. [2022-01-31 10:00:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.083743842364532) internal successors, (220), 203 states have internal predecessors, (220), 3 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 10:00:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 224 transitions. [2022-01-31 10:00:37,731 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 224 transitions. Word has length 142 [2022-01-31 10:00:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:00:37,731 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 224 transitions. [2022-01-31 10:00:37,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 3.08) internal successors, (385), 122 states have internal predecessors, (385), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:00:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 224 transitions. [2022-01-31 10:00:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 10:00:37,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:00:37,733 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:00:37,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 10:00:37,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 10:00:37,952 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:00:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:00:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2098122939, now seen corresponding path program 13 times [2022-01-31 10:00:37,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:00:37,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169366334] [2022-01-31 10:00:37,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:00:37,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:00:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:38,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:00:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-01-31 10:00:38,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:00:38,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169366334] [2022-01-31 10:00:38,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169366334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:00:38,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781174025] [2022-01-31 10:00:38,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:00:38,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:38,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:00:38,099 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:00:38,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 10:00:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:38,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 10:00:38,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:00:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-01-31 10:00:38,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:00:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-01-31 10:00:38,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781174025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:00:38,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:00:38,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 10:00:38,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797201472] [2022-01-31 10:00:38,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:00:38,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 10:00:38,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:00:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 10:00:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:00:38,748 INFO L87 Difference]: Start difference. First operand 208 states and 224 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 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 10:00:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:00:39,269 INFO L93 Difference]: Finished difference Result 331 states and 347 transitions. [2022-01-31 10:00:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 10:00:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 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 144 [2022-01-31 10:00:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:00:39,271 INFO L225 Difference]: With dead ends: 331 [2022-01-31 10:00:39,271 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 10:00:39,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2022-01-31 10:00:39,272 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 199 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:00:39,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 146 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:00:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 10:00:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-01-31 10:00:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0829268292682928) internal successors, (222), 205 states have internal predecessors, (222), 3 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 10:00:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 226 transitions. [2022-01-31 10:00:39,275 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 226 transitions. Word has length 144 [2022-01-31 10:00:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:00:39,275 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 226 transitions. [2022-01-31 10:00:39,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 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 10:00:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 226 transitions. [2022-01-31 10:00:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 10:00:39,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:00:39,276 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:00:39,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-31 10:00:39,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 10:00:39,477 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:00:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:00:39,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1871797912, now seen corresponding path program 14 times [2022-01-31 10:00:39,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:00:39,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508771191] [2022-01-31 10:00:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:00:39,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:00:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:39,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:00:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-01-31 10:00:39,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:00:39,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508771191] [2022-01-31 10:00:39,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508771191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:00:39,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285143405] [2022-01-31 10:00:39,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:00:39,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:39,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:00:39,616 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:00:39,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 10:00:39,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:00:39,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:00:39,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 10:00:39,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:00:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-01-31 10:00:39,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:00:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-01-31 10:00:40,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285143405] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:00:40,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:00:40,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 10:00:40,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639290895] [2022-01-31 10:00:40,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:00:40,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 10:00:40,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:00:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 10:00:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:00:40,012 INFO L87 Difference]: Start difference. First operand 210 states and 226 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 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 10:00:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:00:40,289 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2022-01-31 10:00:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 10:00:40,290 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 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 146 [2022-01-31 10:00:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:00:40,295 INFO L225 Difference]: With dead ends: 175 [2022-01-31 10:00:40,295 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 10:00:40,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 284 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:00:40,305 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 392 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:00:40,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 89 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:00:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 10:00:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2022-01-31 10:00:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.06875) internal successors, (171), 160 states have internal predecessors, (171), 3 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 10:00:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2022-01-31 10:00:40,310 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 146 [2022-01-31 10:00:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:00:40,310 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2022-01-31 10:00:40,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 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 10:00:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2022-01-31 10:00:40,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 10:00:40,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:00:40,311 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:00:40,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-31 10:00:40,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:40,528 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:00:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:00:40,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1855712986, now seen corresponding path program 15 times [2022-01-31 10:00:40,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:00:40,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276631781] [2022-01-31 10:00:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:00:40,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:00:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:50,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:00:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:00:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 12 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:00:50,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:00:50,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276631781] [2022-01-31 10:00:50,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276631781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:00:50,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138946643] [2022-01-31 10:00:50,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:00:50,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:00:50,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:00:50,414 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:00:50,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 10:00:50,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 10:00:50,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:00:50,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 272 conjunts are in the unsatisfiable core [2022-01-31 10:00:50,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:00:50,784 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 10:01:00,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:00,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:00,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:00,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:00,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:01:00,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:01:00,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 103 [2022-01-31 10:01:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 7 proven. 380 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:01:00,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 10:01:22,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138946643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:22,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:22,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 37, 32] total 155 [2022-01-31 10:01:22,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788457935] [2022-01-31 10:01:22,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:22,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-01-31 10:01:22,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:22,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-01-31 10:01:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1571, Invalid=22299, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 10:01:22,718 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand has 155 states, 155 states have (on average 2.9612903225806453) internal successors, (459), 152 states have internal predecessors, (459), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:39,432 INFO L93 Difference]: Finished difference Result 573 states and 614 transitions. [2022-01-31 10:01:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 10:01:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.9612903225806453) internal successors, (459), 152 states have internal predecessors, (459), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-01-31 10:01:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:39,434 INFO L225 Difference]: With dead ends: 573 [2022-01-31 10:01:39,434 INFO L226 Difference]: Without dead ends: 568 [2022-01-31 10:01:39,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 228 SyntacticMatches, 96 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22922 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=3080, Invalid=46426, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 10:01:39,437 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 110 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 6771 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 16100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 6771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8575 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:39,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 505 Invalid, 16100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 6771 Invalid, 0 Unknown, 8575 Unchecked, 3.9s Time] [2022-01-31 10:01:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-31 10:01:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 413. [2022-01-31 10:01:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 408 states have (on average 1.0735294117647058) internal successors, (438), 408 states have internal predecessors, (438), 3 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 10:01:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 442 transitions. [2022-01-31 10:01:39,443 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 442 transitions. Word has length 164 [2022-01-31 10:01:39,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:39,444 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 442 transitions. [2022-01-31 10:01:39,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.9612903225806453) internal successors, (459), 152 states have internal predecessors, (459), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:01:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 442 transitions. [2022-01-31 10:01:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 10:01:39,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:39,445 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:39,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-31 10:01:39,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 10:01:39,670 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:39,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1417816994, now seen corresponding path program 16 times [2022-01-31 10:01:39,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:39,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003684634] [2022-01-31 10:01:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:39,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:39,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 51 proven. 49 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-01-31 10:01:39,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:39,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003684634] [2022-01-31 10:01:39,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003684634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:39,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619499633] [2022-01-31 10:01:39,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:01:39,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:39,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:39,832 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:39,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 10:01:39,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:01:39,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:39,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 10:01:39,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 62 proven. 36 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-01-31 10:01:40,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 62 proven. 36 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-01-31 10:01:40,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619499633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:40,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:40,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 28 [2022-01-31 10:01:40,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073449459] [2022-01-31 10:01:40,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:40,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 10:01:40,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:40,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 10:01:40,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2022-01-31 10:01:40,595 INFO L87 Difference]: Start difference. First operand 413 states and 442 transitions. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 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 10:01:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:41,188 INFO L93 Difference]: Finished difference Result 425 states and 444 transitions. [2022-01-31 10:01:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 10:01:41,188 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 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 168 [2022-01-31 10:01:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:41,189 INFO L225 Difference]: With dead ends: 425 [2022-01-31 10:01:41,189 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 10:01:41,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 10:01:41,190 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 191 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:41,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 113 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 10:01:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 10:01:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2022-01-31 10:01:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.07168458781362) internal successors, (299), 279 states have internal predecessors, (299), 3 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 10:01:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 303 transitions. [2022-01-31 10:01:41,194 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 303 transitions. Word has length 168 [2022-01-31 10:01:41,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:41,195 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 303 transitions. [2022-01-31 10:01:41,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 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 10:01:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 303 transitions. [2022-01-31 10:01:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 10:01:41,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:41,195 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:41,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 10:01:41,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:41,407 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1573692351, now seen corresponding path program 17 times [2022-01-31 10:01:41,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:41,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543356236] [2022-01-31 10:01:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:41,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:41,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-01-31 10:01:41,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:41,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543356236] [2022-01-31 10:01:41,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543356236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:41,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37260505] [2022-01-31 10:01:41,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:01:41,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:41,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:41,592 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:41,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 10:01:41,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 10:01:41,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:41,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 10:01:41,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-01-31 10:01:42,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:01:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-01-31 10:01:42,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37260505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:01:42,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:01:42,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-01-31 10:01:42,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809284065] [2022-01-31 10:01:42,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:01:42,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 10:01:42,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:01:42,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 10:01:42,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 10:01:42,371 INFO L87 Difference]: Start difference. First operand 284 states and 303 transitions. Second operand has 40 states, 40 states have (on average 3.775) internal successors, (151), 39 states have internal predecessors, (151), 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 10:01:42,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:01:42,891 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2022-01-31 10:01:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 10:01:42,891 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.775) internal successors, (151), 39 states have internal predecessors, (151), 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 168 [2022-01-31 10:01:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:01:42,892 INFO L225 Difference]: With dead ends: 197 [2022-01-31 10:01:42,892 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 10:01:42,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 10:01:42,893 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 468 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:01:42,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 89 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:01:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 10:01:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2022-01-31 10:01:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0604395604395604) internal successors, (193), 182 states have internal predecessors, (193), 3 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 10:01:42,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 197 transitions. [2022-01-31 10:01:42,896 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 197 transitions. Word has length 168 [2022-01-31 10:01:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:01:42,896 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 197 transitions. [2022-01-31 10:01:42,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.775) internal successors, (151), 39 states have internal predecessors, (151), 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 10:01:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 197 transitions. [2022-01-31 10:01:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 10:01:42,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:01:42,897 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:01:42,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 10:01:43,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:43,116 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:01:43,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:01:43,117 INFO L85 PathProgramCache]: Analyzing trace with hash 101518991, now seen corresponding path program 18 times [2022-01-31 10:01:43,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:01:43,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949872951] [2022-01-31 10:01:43,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:01:43,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:01:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:56,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:01:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:01:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 90 proven. 449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:01:56,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:01:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949872951] [2022-01-31 10:01:56,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949872951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:01:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523801177] [2022-01-31 10:01:56,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:01:56,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:01:56,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:01:56,573 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:01:56,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 10:01:56,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 10:01:56,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:01:56,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 310 conjunts are in the unsatisfiable core [2022-01-31 10:01:56,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:01:57,061 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 10:02:09,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:02:09,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:02:09,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 181 treesize of output 257 [2022-01-31 10:02:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 13 proven. 490 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 10:02:10,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:02:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 503 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 10:02:37,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523801177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:02:37,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:02:37,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 39, 36] total 178 [2022-01-31 10:02:37,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585569027] [2022-01-31 10:02:37,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:02:37,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2022-01-31 10:02:37,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:02:37,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2022-01-31 10:02:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1662, Invalid=29844, Unknown=0, NotChecked=0, Total=31506 [2022-01-31 10:02:37,315 INFO L87 Difference]: Start difference. First operand 187 states and 197 transitions. Second operand has 178 states, 178 states have (on average 2.8707865168539324) internal successors, (511), 175 states have internal predecessors, (511), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:11,339 INFO L93 Difference]: Finished difference Result 340 states and 361 transitions. [2022-01-31 10:03:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 10:03:11,340 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 2.8707865168539324) internal successors, (511), 175 states have internal predecessors, (511), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-01-31 10:03:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:11,341 INFO L225 Difference]: With dead ends: 340 [2022-01-31 10:03:11,341 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 10:03:11,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 311 SyntacticMatches, 64 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31947 ImplicationChecksByTransitivity, 63.7s TimeCoverageRelationStatistics Valid=4391, Invalid=76549, Unknown=0, NotChecked=0, Total=80940 [2022-01-31 10:03:11,345 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 6099 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 9804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 6099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3163 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:11,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 581 Invalid, 9804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 6099 Invalid, 0 Unknown, 3163 Unchecked, 4.1s Time] [2022-01-31 10:03:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 10:03:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 272. [2022-01-31 10:03:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.0636704119850187) internal successors, (284), 267 states have internal predecessors, (284), 3 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 10:03:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 288 transitions. [2022-01-31 10:03:11,354 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 288 transitions. Word has length 186 [2022-01-31 10:03:11,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:11,354 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 288 transitions. [2022-01-31 10:03:11,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 2.8707865168539324) internal successors, (511), 175 states have internal predecessors, (511), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:03:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 288 transitions. [2022-01-31 10:03:11,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 10:03:11,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:11,355 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:11,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 10:03:11,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:11,574 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:11,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:11,574 INFO L85 PathProgramCache]: Analyzing trace with hash -313095859, now seen corresponding path program 19 times [2022-01-31 10:03:11,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:11,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051056826] [2022-01-31 10:03:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:11,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:11,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-01-31 10:03:11,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:11,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051056826] [2022-01-31 10:03:11,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051056826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667896901] [2022-01-31 10:03:11,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:03:11,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:11,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:11,777 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:03:11,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 10:03:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:11,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 10:03:11,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-01-31 10:03:12,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-01-31 10:03:12,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667896901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:12,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:12,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 10:03:12,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847438342] [2022-01-31 10:03:12,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:12,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 10:03:12,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:12,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 10:03:12,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-01-31 10:03:12,608 INFO L87 Difference]: Start difference. First operand 272 states and 288 transitions. Second operand has 30 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 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 10:03:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:13,338 INFO L93 Difference]: Finished difference Result 435 states and 451 transitions. [2022-01-31 10:03:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 10:03:13,339 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 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 188 [2022-01-31 10:03:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:13,340 INFO L225 Difference]: With dead ends: 435 [2022-01-31 10:03:13,340 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 10:03:13,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 367 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=338, Invalid=1222, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 10:03:13,340 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 219 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:13,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 143 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 10:03:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 10:03:13,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2022-01-31 10:03:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.063197026022305) internal successors, (286), 269 states have internal predecessors, (286), 3 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 10:03:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 290 transitions. [2022-01-31 10:03:13,344 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 290 transitions. Word has length 188 [2022-01-31 10:03:13,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:13,344 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 290 transitions. [2022-01-31 10:03:13,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 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 10:03:13,344 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 290 transitions. [2022-01-31 10:03:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 10:03:13,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:13,345 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:13,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-31 10:03:13,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:13,555 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1396605014, now seen corresponding path program 20 times [2022-01-31 10:03:13,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:13,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830568367] [2022-01-31 10:03:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:13,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:13,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-01-31 10:03:13,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:13,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830568367] [2022-01-31 10:03:13,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830568367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:13,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709942302] [2022-01-31 10:03:13,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:03:13,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:13,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:13,811 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:03:13,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 10:03:13,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:03:13,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:03:13,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 10:03:13,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-01-31 10:03:14,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:03:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-01-31 10:03:14,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709942302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:03:14,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:03:14,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 10:03:14,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656622385] [2022-01-31 10:03:14,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:03:14,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 10:03:14,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:03:14,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 10:03:14,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 10:03:14,569 INFO L87 Difference]: Start difference. First operand 274 states and 290 transitions. Second operand has 30 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 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 10:03:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:03:15,181 INFO L93 Difference]: Finished difference Result 219 states and 229 transitions. [2022-01-31 10:03:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 10:03:15,181 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 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 190 [2022-01-31 10:03:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:03:15,182 INFO L225 Difference]: With dead ends: 219 [2022-01-31 10:03:15,182 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 10:03:15,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 370 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=436, Invalid=1204, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 10:03:15,182 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 632 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:03:15,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 69 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 10:03:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 10:03:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 209. [2022-01-31 10:03:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.053921568627451) internal successors, (215), 204 states have internal predecessors, (215), 3 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 10:03:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 219 transitions. [2022-01-31 10:03:15,185 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 219 transitions. Word has length 190 [2022-01-31 10:03:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:03:15,185 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 219 transitions. [2022-01-31 10:03:15,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 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 10:03:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 219 transitions. [2022-01-31 10:03:15,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 10:03:15,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:03:15,186 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:03:15,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 10:03:15,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-31 10:03:15,387 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:03:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:03:15,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1153843640, now seen corresponding path program 21 times [2022-01-31 10:03:15,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:03:15,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421393016] [2022-01-31 10:03:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:03:15,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:03:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:35,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:03:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:03:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 74 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:03:35,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:03:35,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421393016] [2022-01-31 10:03:35,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421393016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:03:35,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180151825] [2022-01-31 10:03:35,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:03:35,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:03:35,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:03:35,860 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:03:35,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 10:03:36,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 10:03:36,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:03:36,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 356 conjunts are in the unsatisfiable core [2022-01-31 10:03:36,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:03:36,255 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 10:03:58,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:03:58,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:03:58,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 175 [2022-01-31 10:03:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 9 proven. 679 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:03:59,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:04:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 655 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 10:04:39,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180151825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:04:39,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:04:39,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 46, 40] total 200 [2022-01-31 10:04:39,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399080348] [2022-01-31 10:04:39,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:04:39,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-01-31 10:04:39,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:04:39,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-01-31 10:04:39,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2167, Invalid=37633, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 10:04:39,811 INFO L87 Difference]: Start difference. First operand 209 states and 219 transitions. Second operand has 200 states, 200 states have (on average 2.825) internal successors, (565), 197 states have internal predecessors, (565), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:04:42,228 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-01-31 10:04:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 10:04:42,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 332 SyntacticMatches, 71 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28689 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=2298, Invalid=42434, Unknown=0, NotChecked=0, Total=44732 [2022-01-31 10:04:42,231 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 10:04:42,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 385 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1099 Invalid, 0 Unknown, 480 Unchecked, 0.7s Time] [2022-01-31 10:04:42,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-01-31 10:04:42,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 10:04:42,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 10:04:42,432 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 49 more [2022-01-31 10:04:42,435 INFO L158 Benchmark]: Toolchain (without parser) took 486882.59ms. Allocated memory was 201.3MB in the beginning and 914.4MB in the end (delta: 713.0MB). Free memory was 152.1MB in the beginning and 345.0MB in the end (delta: -192.9MB). Peak memory consumption was 520.6MB. Max. memory is 8.0GB. [2022-01-31 10:04:42,436 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 201.3MB. Free memory was 168.4MB in the beginning and 168.3MB in the end (delta: 127.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 10:04:42,436 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.86ms. Allocated memory is still 201.3MB. Free memory was 151.8MB in the beginning and 177.0MB in the end (delta: -25.2MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-01-31 10:04:42,436 INFO L158 Benchmark]: Boogie Preprocessor took 54.63ms. Allocated memory is still 201.3MB. Free memory was 177.0MB in the beginning and 175.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 10:04:42,436 INFO L158 Benchmark]: RCFGBuilder took 384.35ms. Allocated memory is still 201.3MB. Free memory was 175.4MB in the beginning and 161.2MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-01-31 10:04:42,436 INFO L158 Benchmark]: IcfgTransformer took 26.10ms. Allocated memory is still 201.3MB. Free memory was 161.2MB in the beginning and 159.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 10:04:42,436 INFO L158 Benchmark]: TraceAbstraction took 486198.84ms. Allocated memory was 201.3MB in the beginning and 914.4MB in the end (delta: 713.0MB). Free memory was 159.1MB in the beginning and 345.0MB in the end (delta: -185.8MB). Peak memory consumption was 528.2MB. Max. memory is 8.0GB. [2022-01-31 10:04:42,437 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 201.3MB. Free memory was 168.4MB in the beginning and 168.3MB in the end (delta: 127.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 212.86ms. Allocated memory is still 201.3MB. Free memory was 151.8MB in the beginning and 177.0MB in the end (delta: -25.2MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 54.63ms. Allocated memory is still 201.3MB. Free memory was 177.0MB in the beginning and 175.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 384.35ms. Allocated memory is still 201.3MB. Free memory was 175.4MB in the beginning and 161.2MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 26.10ms. Allocated memory is still 201.3MB. Free memory was 161.2MB in the beginning and 159.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 486198.84ms. Allocated memory was 201.3MB in the beginning and 914.4MB in the end (delta: 713.0MB). Free memory was 159.1MB in the beginning and 345.0MB in the end (delta: -185.8MB). Peak memory consumption was 528.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...