/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:23:39,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:23:39,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:23:39,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:23:39,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:23:39,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:23:39,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:23:39,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:23:39,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:23:39,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:23:39,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:23:39,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:23:39,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:23:39,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:23:39,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:23:39,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:23:39,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:23:39,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:23:39,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:23:39,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:23:39,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:23:39,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:23:39,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:23:39,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:23:39,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:23:39,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:23:39,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:23:39,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:23:39,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:23:39,401 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:23:39,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:23:39,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:23:39,402 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:23:39,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:23:39,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:23:39,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:23:39,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:23:39,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:23:39,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:23:39,404 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:23:39,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:23:39,404 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:23:39,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:23:39,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:23:39,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:23:39,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:23:39,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:23:39,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:39,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:23:39,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:23:39,406 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:23:39,406 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:23:39,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:23:39,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:23:39,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:23:39,629 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:23:39,629 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:23:39,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2022-01-31 07:23:39,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71f445f12/019c4f177d0047cd826fbae2ca70ef44/FLAGeefebb285 [2022-01-31 07:23:40,024 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:23:40,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2022-01-31 07:23:40,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71f445f12/019c4f177d0047cd826fbae2ca70ef44/FLAGeefebb285 [2022-01-31 07:23:40,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71f445f12/019c4f177d0047cd826fbae2ca70ef44 [2022-01-31 07:23:40,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:23:40,053 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:23:40,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:40,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:23:40,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:23:40,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2f1213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:23:40,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:23:40,236 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2022-01-31 07:23:40,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:40,314 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:23:40,324 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2022-01-31 07:23:40,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:40,352 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:23:40,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40 WrapperNode [2022-01-31 07:23:40,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:40,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:23:40,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:23:40,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:23:40,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:23:40,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:23:40,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:23:40,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:23:40,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:40,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:40,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 07:23:40,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 07:23:40,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:23:40,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:23:40,486 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:23:40,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:23:40,487 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2022-01-31 07:23:40,487 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2022-01-31 07:23:40,487 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:23:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:23:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:23:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:23:40,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:23:40,489 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:23:40,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:23:40,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:23:40,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:23:40,490 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2022-01-31 07:23:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:23:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2022-01-31 07:23:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:23:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:23:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:23:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:23:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:23:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:23:40,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:23:40,549 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:23:40,551 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:23:40,740 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:23:40,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:23:40,744 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-31 07:23:40,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:40 BoogieIcfgContainer [2022-01-31 07:23:40,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:23:40,746 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:23:40,746 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:23:40,748 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:23:40,751 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:40 BasicIcfg [2022-01-31 07:23:40,766 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:23:40,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:23:40,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:23:40,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:23:40,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:23:40" (1/4) ... [2022-01-31 07:23:40,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98e1d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (2/4) ... [2022-01-31 07:23:40,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98e1d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:40" (3/4) ... [2022-01-31 07:23:40,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98e1d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:40" (4/4) ... [2022-01-31 07:23:40,771 INFO L111 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.iJordan [2022-01-31 07:23:40,774 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:23:40,775 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:23:40,805 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:23:40,809 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 07:23:40,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:23:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 07:23:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 07:23:40,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:40,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:40,825 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:40,828 INFO L85 PathProgramCache]: Analyzing trace with hash -10592045, now seen corresponding path program 1 times [2022-01-31 07:23:40,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:40,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806942069] [2022-01-31 07:23:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:40,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:40,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:40,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:40,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806942069] [2022-01-31 07:23:40,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806942069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:40,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:40,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:23:40,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755053555] [2022-01-31 07:23:40,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:40,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:40,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:41,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:41,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:23:41,005 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:41,063 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-01-31 07:23:41,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:41,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 07:23:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:41,072 INFO L225 Difference]: With dead ends: 54 [2022-01-31 07:23:41,072 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 07:23:41,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:23:41,077 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 49 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:41,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 63 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 07:23:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-01-31 07:23:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-01-31 07:23:41,109 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2022-01-31 07:23:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:41,110 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-01-31 07:23:41,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-01-31 07:23:41,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 07:23:41,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:23:41,112 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1732218290, now seen corresponding path program 1 times [2022-01-31 07:23:41,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639882244] [2022-01-31 07:23:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:41,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639882244] [2022-01-31 07:23:41,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639882244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:41,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:41,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:23:41,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721937176] [2022-01-31 07:23:41,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:41,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:23:41,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:41,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:23:41,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:23:41,183 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:41,326 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-01-31 07:23:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:23:41,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 07:23:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:41,330 INFO L225 Difference]: With dead ends: 75 [2022-01-31 07:23:41,330 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 07:23:41,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:41,335 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 93 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:41,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 55 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:41,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 07:23:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2022-01-31 07:23:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:41,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-01-31 07:23:41,344 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 14 [2022-01-31 07:23:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:41,344 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-01-31 07:23:41,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-01-31 07:23:41,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 07:23:41,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:23:41,345 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,346 INFO L85 PathProgramCache]: Analyzing trace with hash -137801612, now seen corresponding path program 1 times [2022-01-31 07:23:41,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382014996] [2022-01-31 07:23:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:41,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382014996] [2022-01-31 07:23:41,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382014996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:41,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608615461] [2022-01-31 07:23:41,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:41,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:41,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 07:23:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:23:41,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608615461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:41,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:41,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:23:41,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237233998] [2022-01-31 07:23:41,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:41,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:23:41,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:41,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:23:41,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:23:41,588 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:41,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:41,858 INFO L93 Difference]: Finished difference Result 152 states and 202 transitions. [2022-01-31 07:23:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:23:41,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 16 [2022-01-31 07:23:41,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:41,864 INFO L225 Difference]: With dead ends: 152 [2022-01-31 07:23:41,865 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 07:23:41,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:23:41,867 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 318 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:41,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 60 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:23:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 07:23:41,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 56. [2022-01-31 07:23:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-01-31 07:23:41,885 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 16 [2022-01-31 07:23:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:41,885 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-01-31 07:23:41,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-01-31 07:23:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 07:23:41,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,886 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,923 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 07:23:42,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:42,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1050486202, now seen corresponding path program 2 times [2022-01-31 07:23:42,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:42,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145483636] [2022-01-31 07:23:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:23:42,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:42,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145483636] [2022-01-31 07:23:42,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145483636] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:42,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:42,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:23:42,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749691408] [2022-01-31 07:23:42,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:42,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:42,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:42,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:42,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:42,198 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:42,276 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-01-31 07:23:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:23:42,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 22 [2022-01-31 07:23:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:42,279 INFO L225 Difference]: With dead ends: 60 [2022-01-31 07:23:42,279 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 07:23:42,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:42,288 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 76 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:42,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 52 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 07:23:42,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-01-31 07:23:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-01-31 07:23:42,297 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 22 [2022-01-31 07:23:42,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:42,297 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-01-31 07:23:42,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-01-31 07:23:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 07:23:42,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:42,298 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:42,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 07:23:42,299 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:42,299 INFO L85 PathProgramCache]: Analyzing trace with hash -630602074, now seen corresponding path program 1 times [2022-01-31 07:23:42,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:42,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337838516] [2022-01-31 07:23:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:23:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 07:23:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 07:23:42,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:42,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337838516] [2022-01-31 07:23:42,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337838516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:42,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:42,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:23:42,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931777253] [2022-01-31 07:23:42,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:42,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:42,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:42,400 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:42,487 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-01-31 07:23:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 07:23:42,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-01-31 07:23:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:42,488 INFO L225 Difference]: With dead ends: 66 [2022-01-31 07:23:42,488 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 07:23:42,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:42,489 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 66 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:42,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 41 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 07:23:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-01-31 07:23:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-01-31 07:23:42,492 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 43 [2022-01-31 07:23:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:42,493 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-01-31 07:23:42,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-01-31 07:23:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 07:23:42,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:42,494 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:42,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 07:23:42,494 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:42,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash -914472990, now seen corresponding path program 1 times [2022-01-31 07:23:42,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:42,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136811035] [2022-01-31 07:23:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 07:23:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 07:23:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 07:23:42,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:42,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136811035] [2022-01-31 07:23:42,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136811035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:42,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638421964] [2022-01-31 07:23:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:42,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:42,555 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:42,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 07:23:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:23:42,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:23:42,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:23:42,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638421964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:42,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:42,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-01-31 07:23:42,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485175761] [2022-01-31 07:23:42,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:42,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 07:23:42,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:42,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 07:23:42,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-01-31 07:23:42,872 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:23:43,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:43,258 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2022-01-31 07:23:43,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 07:23:43,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2022-01-31 07:23:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:43,259 INFO L225 Difference]: With dead ends: 152 [2022-01-31 07:23:43,259 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 07:23:43,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=586, Unknown=0, NotChecked=0, Total=870 [2022-01-31 07:23:43,260 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 300 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:43,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 44 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:23:43,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 07:23:43,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 79. [2022-01-31 07:23:43,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 66 states have internal predecessors, (76), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 07:23:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2022-01-31 07:23:43,264 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 45 [2022-01-31 07:23:43,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:43,265 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2022-01-31 07:23:43,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:23:43,265 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2022-01-31 07:23:43,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 07:23:43,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:43,266 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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] [2022-01-31 07:23:43,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 07:23:43,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-31 07:23:43,477 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:43,478 INFO L85 PathProgramCache]: Analyzing trace with hash -365173552, now seen corresponding path program 1 times [2022-01-31 07:23:43,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:43,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976995876] [2022-01-31 07:23:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 07:23:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 07:23:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 07:23:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-01-31 07:23:43,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:43,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976995876] [2022-01-31 07:23:43,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976995876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:43,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:43,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 07:23:43,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517140463] [2022-01-31 07:23:43,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:43,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 07:23:43,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:43,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 07:23:43,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:23:43,604 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 07:23:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:43,701 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2022-01-31 07:23:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:23:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2022-01-31 07:23:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:43,710 INFO L225 Difference]: With dead ends: 87 [2022-01-31 07:23:43,710 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 07:23:43,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 07:23:43,711 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:43,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 46 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 07:23:43,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-01-31 07:23:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-31 07:23:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-01-31 07:23:43,719 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 69 [2022-01-31 07:23:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:43,720 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-01-31 07:23:43,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 07:23:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-01-31 07:23:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 07:23:43,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:43,725 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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] [2022-01-31 07:23:43,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 07:23:43,725 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:43,726 INFO L85 PathProgramCache]: Analyzing trace with hash 636819632, now seen corresponding path program 1 times [2022-01-31 07:23:43,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:43,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379721809] [2022-01-31 07:23:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 07:23:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 07:23:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 07:23:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 07:23:43,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:43,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379721809] [2022-01-31 07:23:43,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379721809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:43,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926737262] [2022-01-31 07:23:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:43,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:43,858 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:43,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 07:23:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:23:43,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 07:23:44,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 07:23:44,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926737262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:44,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:44,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2022-01-31 07:23:44,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250319471] [2022-01-31 07:23:44,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:44,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 07:23:44,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:44,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 07:23:44,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-01-31 07:23:44,249 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 25 states have internal predecessors, (87), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:23:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:44,853 INFO L93 Difference]: Finished difference Result 241 states and 299 transitions. [2022-01-31 07:23:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 07:23:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 25 states have internal predecessors, (87), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-01-31 07:23:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:44,855 INFO L225 Difference]: With dead ends: 241 [2022-01-31 07:23:44,855 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 07:23:44,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=909, Invalid=1641, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 07:23:44,857 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 516 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:44,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 49 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 07:23:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 07:23:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 109. [2022-01-31 07:23:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 95 states have (on average 1.105263157894737) internal successors, (105), 94 states have internal predecessors, (105), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-31 07:23:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2022-01-31 07:23:44,863 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 69 [2022-01-31 07:23:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:44,863 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2022-01-31 07:23:44,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 25 states have internal predecessors, (87), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:23:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2022-01-31 07:23:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 07:23:44,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:44,865 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 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] [2022-01-31 07:23:44,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:45,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:45,082 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:45,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2129898904, now seen corresponding path program 2 times [2022-01-31 07:23:45,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:45,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646566332] [2022-01-31 07:23:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 07:23:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 07:23:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 07:23:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 07:23:45,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:45,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646566332] [2022-01-31 07:23:45,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646566332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:45,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629670398] [2022-01-31 07:23:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:23:45,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:45,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:45,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:45,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 07:23:45,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:23:45,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:45,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 07:23:45,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 07:23:45,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 07:23:46,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629670398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:46,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:46,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 51 [2022-01-31 07:23:46,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962798465] [2022-01-31 07:23:46,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:46,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 07:23:46,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:46,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 07:23:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 07:23:46,281 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand has 51 states, 51 states have (on average 2.6470588235294117) internal successors, (135), 49 states have internal predecessors, (135), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:23:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:47,877 INFO L93 Difference]: Finished difference Result 433 states and 539 transitions. [2022-01-31 07:23:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 07:23:47,878 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.6470588235294117) internal successors, (135), 49 states have internal predecessors, (135), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 93 [2022-01-31 07:23:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:47,880 INFO L225 Difference]: With dead ends: 433 [2022-01-31 07:23:47,880 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 07:23:47,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3537, Invalid=6165, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 07:23:47,882 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1062 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:47,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 43 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 07:23:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 07:23:47,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 157. [2022-01-31 07:23:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 143 states have (on average 1.06993006993007) internal successors, (153), 142 states have internal predecessors, (153), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-31 07:23:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 171 transitions. [2022-01-31 07:23:47,893 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 171 transitions. Word has length 93 [2022-01-31 07:23:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:47,893 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 171 transitions. [2022-01-31 07:23:47,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.6470588235294117) internal successors, (135), 49 states have internal predecessors, (135), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:23:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 171 transitions. [2022-01-31 07:23:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 07:23:47,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:47,894 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 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] [2022-01-31 07:23:47,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:48,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:48,108 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:48,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1022766952, now seen corresponding path program 3 times [2022-01-31 07:23:48,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:48,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829065849] [2022-01-31 07:23:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:48,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-31 07:23:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-31 07:23:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 07:23:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2131 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 07:23:48,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:48,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829065849] [2022-01-31 07:23:48,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829065849] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:48,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997783304] [2022-01-31 07:23:48,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:23:48,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:48,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:48,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:49,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 07:23:49,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 07:23:49,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:49,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 07:23:49,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2131 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-01-31 07:23:49,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2131 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-01-31 07:23:49,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997783304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:49,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:49,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 5, 5] total 57 [2022-01-31 07:23:49,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540719236] [2022-01-31 07:23:49,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:49,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 07:23:49,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 07:23:49,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1207, Invalid=1985, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 07:23:49,523 INFO L87 Difference]: Start difference. First operand 157 states and 171 transitions. Second operand has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 55 states have internal predecessors, (152), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:23:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:51,458 INFO L93 Difference]: Finished difference Result 508 states and 644 transitions. [2022-01-31 07:23:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 07:23:51,459 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 55 states have internal predecessors, (152), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 141 [2022-01-31 07:23:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:51,462 INFO L225 Difference]: With dead ends: 508 [2022-01-31 07:23:51,462 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 07:23:51,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4278, Invalid=8154, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 07:23:51,464 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1251 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:51,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 44 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 07:23:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 07:23:51,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 223. [2022-01-31 07:23:51,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 197 states have (on average 1.0913705583756346) internal successors, (215), 192 states have internal predecessors, (215), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (30), 25 states have call predecessors, (30), 19 states have call successors, (30) [2022-01-31 07:23:51,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 265 transitions. [2022-01-31 07:23:51,473 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 265 transitions. Word has length 141 [2022-01-31 07:23:51,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:51,473 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 265 transitions. [2022-01-31 07:23:51,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 55 states have internal predecessors, (152), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:23:51,474 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 265 transitions. [2022-01-31 07:23:51,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 07:23:51,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:51,475 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:51,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 07:23:51,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 07:23:51,692 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:51,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash 399097038, now seen corresponding path program 4 times [2022-01-31 07:23:51,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:51,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895376609] [2022-01-31 07:23:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:51,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-31 07:23:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 07:23:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 07:23:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 07:23:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 07:23:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 07:23:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 07:23:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 07:23:52,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:52,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895376609] [2022-01-31 07:23:52,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895376609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:52,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639589814] [2022-01-31 07:23:52,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:23:52,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:52,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:52,581 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:52,582 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 07:23:52,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:23:52,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:52,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 07:23:52,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 07:23:53,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 07:23:55,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639589814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:55,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:55,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50, 50] total 101 [2022-01-31 07:23:55,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618161297] [2022-01-31 07:23:55,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:55,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 07:23:55,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:55,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 07:23:55,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 07:23:55,283 INFO L87 Difference]: Start difference. First operand 223 states and 265 transitions. Second operand has 101 states, 101 states have (on average 2.3267326732673266) internal successors, (235), 99 states have internal predecessors, (235), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:24:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:00,772 INFO L93 Difference]: Finished difference Result 897 states and 1131 transitions. [2022-01-31 07:24:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 07:24:00,772 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.3267326732673266) internal successors, (235), 99 states have internal predecessors, (235), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 191 [2022-01-31 07:24:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:00,781 INFO L225 Difference]: With dead ends: 897 [2022-01-31 07:24:00,781 INFO L226 Difference]: Without dead ends: 897 [2022-01-31 07:24:00,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6257 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14562, Invalid=24840, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 07:24:00,786 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2328 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 1252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1252 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:00,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2329 Valid, 53 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1252 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 07:24:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-01-31 07:24:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 321. [2022-01-31 07:24:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 295 states have (on average 1.0610169491525423) internal successors, (313), 290 states have internal predecessors, (313), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (30), 25 states have call predecessors, (30), 19 states have call successors, (30) [2022-01-31 07:24:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 363 transitions. [2022-01-31 07:24:00,811 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 363 transitions. Word has length 191 [2022-01-31 07:24:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:00,811 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 363 transitions. [2022-01-31 07:24:00,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.3267326732673266) internal successors, (235), 99 states have internal predecessors, (235), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:24:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 363 transitions. [2022-01-31 07:24:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-31 07:24:00,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:00,813 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:24:00,833 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 07:24:01,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:01,026 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1534324244, now seen corresponding path program 5 times [2022-01-31 07:24:01,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:01,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017812314] [2022-01-31 07:24:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:01,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-01-31 07:24:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2022-01-31 07:24:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2022-01-31 07:24:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2022-01-31 07:24:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2022-01-31 07:24:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2022-01-31 07:24:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2022-01-31 07:24:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9403 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 07:24:03,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:03,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017812314] [2022-01-31 07:24:03,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017812314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:03,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101734972] [2022-01-31 07:24:03,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:24:03,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:03,955 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 07:24:03,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process