/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:21:32,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:21:32,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:21:32,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 08:21:32,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:21:32,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:21:32,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:21:32,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:21:32,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:21:32,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:21:32,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:21:32,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:21:32,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:21:32,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:21:32,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:21:32,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:21:32,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:21:32,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:21:32,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:21:32,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:21:32,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:21:32,534 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:21:32,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:21:32,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:21:32,535 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:21:32,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:21:32,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:21:32,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:21:32,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:21:32,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:21:32,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:21:32,541 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:21:32,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:21:32,541 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:21:32,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:21:32,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:21:32,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:21:32,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:21:32,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:21:32,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:21:32,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:21:32,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:21:32,543 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:21:32,543 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:21:32,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:21:32,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:21:32,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:21:32,761 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:21:32,763 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:21:32,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2022-01-31 08:21:32,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbae7391b/13535b5d9ea34f7fb62280706fd39342/FLAGe107ddf28 [2022-01-31 08:21:33,158 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:21:33,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2022-01-31 08:21:33,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbae7391b/13535b5d9ea34f7fb62280706fd39342/FLAGe107ddf28 [2022-01-31 08:21:33,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbae7391b/13535b5d9ea34f7fb62280706fd39342 [2022-01-31 08:21:33,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:21:33,183 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:21:33,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:21:33,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:21:33,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:21:33,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:21:33" (1/1) ... [2022-01-31 08:21:33,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@687a29ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:21:33, skipping insertion in model container [2022-01-31 08:21:33,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:21:33" (1/1) ... [2022-01-31 08:21:33,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:21:33,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:21:33,371 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i[821,834] [2022-01-31 08:21:33,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:21:33,393 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:21:33,409 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i[821,834] [2022-01-31 08:21:33,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:21:33,434 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:21:33,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:21:33 WrapperNode [2022-01-31 08:21:33,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:21:33,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:21:33,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:21:33,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:21:33,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:21:33" (1/1) ... [2022-01-31 08:21:33,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:21:33" (1/1) ... [2022-01-31 08:21:33,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:21:33" (1/1) ... [2022-01-31 08:21:33,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:21:33" (1/1) ... [2022-01-31 08:21:33,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:21:33" (1/1) ... [2022-01-31 08:21:33,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:21:33" (1/1) ... [2022-01-31 08:21:33,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:21:33" (1/1) ... [2022-01-31 08:21:33,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:21:33,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:21:33,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:21:33,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:21:33,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:21:33" (1/1) ... [2022-01-31 08:21:33,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:21:33,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:21:33,483 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 08:21:33,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 08:21:33,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:21:33,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:21:33,509 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:21:33,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:21:33,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:21:33,509 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:21:33,509 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:21:33,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:21:33,559 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:21:33,561 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:21:33,714 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:21:33,718 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:21:33,718 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 08:21:33,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:21:33 BoogieIcfgContainer [2022-01-31 08:21:33,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:21:33,720 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:21:33,720 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:21:33,726 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:21:33,728 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:21:33" (1/1) ... [2022-01-31 08:21:33,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:21:33 BasicIcfg [2022-01-31 08:21:33,756 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:21:33,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:21:33,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:21:33,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:21:33,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:21:33" (1/4) ... [2022-01-31 08:21:33,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c0ca65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:21:33, skipping insertion in model container [2022-01-31 08:21:33,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:21:33" (2/4) ... [2022-01-31 08:21:33,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c0ca65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:21:33, skipping insertion in model container [2022-01-31 08:21:33,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:21:33" (3/4) ... [2022-01-31 08:21:33,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c0ca65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:21:33, skipping insertion in model container [2022-01-31 08:21:33,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:21:33" (4/4) ... [2022-01-31 08:21:33,761 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.iJordan [2022-01-31 08:21:33,765 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:21:33,765 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:21:33,824 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:21:33,832 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:21:33,833 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:21:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:21:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 08:21:33,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:21:33,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:21:33,856 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:21:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:21:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1652866577, now seen corresponding path program 1 times [2022-01-31 08:21:33,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:21:33,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614932717] [2022-01-31 08:21:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:21:33,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:21:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:34,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:21:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:21:34,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:21:34,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614932717] [2022-01-31 08:21:34,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614932717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:21:34,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:21:34,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:21:34,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161609007] [2022-01-31 08:21:34,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:21:34,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:21:34,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:21:34,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:21:34,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:21:34,066 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:21:34,094 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-01-31 08:21:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:21:34,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 08:21:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:21:34,101 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:21:34,101 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 08:21:34,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:21:34,106 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:21:34,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:21:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 08:21:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 08:21:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:21:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-01-31 08:21:34,130 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2022-01-31 08:21:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:21:34,131 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-01-31 08:21:34,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-01-31 08:21:34,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 08:21:34,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:21:34,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:21:34,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:21:34,134 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:21:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:21:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash -899290384, now seen corresponding path program 1 times [2022-01-31 08:21:34,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:21:34,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134476146] [2022-01-31 08:21:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:21:34,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:21:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:34,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:21:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:21:34,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:21:34,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134476146] [2022-01-31 08:21:34,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134476146] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:21:34,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:21:34,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:21:34,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476045501] [2022-01-31 08:21:34,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:21:34,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:21:34,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:21:34,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:21:34,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:21:34,214 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:21:34,294 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-01-31 08:21:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:21:34,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 08:21:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:21:34,295 INFO L225 Difference]: With dead ends: 33 [2022-01-31 08:21:34,295 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 08:21:34,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:21:34,296 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:21:34,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 25 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:21:34,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 08:21:34,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-01-31 08:21:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:21:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 08:21:34,300 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2022-01-31 08:21:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:21:34,300 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 08:21:34,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 08:21:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 08:21:34,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:21:34,301 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:21:34,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:21:34,302 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:21:34,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:21:34,302 INFO L85 PathProgramCache]: Analyzing trace with hash 847417356, now seen corresponding path program 1 times [2022-01-31 08:21:34,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:21:34,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540931507] [2022-01-31 08:21:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:21:34,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:21:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:34,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:21:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:21:34,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:21:34,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540931507] [2022-01-31 08:21:34,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540931507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:21:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549792942] [2022-01-31 08:21:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:21:34,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:34,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:21:34,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:21:34,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:21:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:21:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:21:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:21:34,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:21:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:21:34,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549792942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:21:34,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:21:34,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:21:34,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965670035] [2022-01-31 08:21:34,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:21:34,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:21:34,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:21:34,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:21:34,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:21:34,625 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:21:34,761 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2022-01-31 08:21:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:21:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 08:21:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:21:34,765 INFO L225 Difference]: With dead ends: 53 [2022-01-31 08:21:34,765 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 08:21:34,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:21:34,769 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:21:34,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 24 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:21:34,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 08:21:34,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-01-31 08:21:34,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:21:34,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2022-01-31 08:21:34,777 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 22 [2022-01-31 08:21:34,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:21:34,777 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2022-01-31 08:21:34,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2022-01-31 08:21:34,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 08:21:34,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:21:34,779 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:21:34,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 08:21:34,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:34,997 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:21:34,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:21:34,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1591201552, now seen corresponding path program 2 times [2022-01-31 08:21:34,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:21:34,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462120260] [2022-01-31 08:21:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:21:34,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:21:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:35,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:21:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:21:35,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:21:35,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462120260] [2022-01-31 08:21:35,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462120260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:21:35,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708166684] [2022-01-31 08:21:35,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:21:35,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:35,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:21:35,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:21:35,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:21:35,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:21:35,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:21:35,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:21:35,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:21:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:21:35,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:21:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:21:35,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708166684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:21:35,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:21:35,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-31 08:21:35,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171595858] [2022-01-31 08:21:35,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:21:35,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:21:35,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:21:35,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:21:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:21:35,441 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:21:35,794 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2022-01-31 08:21:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:21:35,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 08:21:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:21:35,797 INFO L225 Difference]: With dead ends: 107 [2022-01-31 08:21:35,797 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 08:21:35,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:21:35,798 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 278 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:21:35,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 34 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:21:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 08:21:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2022-01-31 08:21:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.3793103448275863) internal successors, (120), 87 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:21:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2022-01-31 08:21:35,810 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 40 [2022-01-31 08:21:35,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:21:35,811 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2022-01-31 08:21:35,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2022-01-31 08:21:35,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 08:21:35,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:21:35,814 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:21:35,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 08:21:36,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 08:21:36,028 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:21:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:21:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1919314637, now seen corresponding path program 3 times [2022-01-31 08:21:36,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:21:36,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196670579] [2022-01-31 08:21:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:21:36,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:21:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:36,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:21:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-01-31 08:21:36,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:21:36,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196670579] [2022-01-31 08:21:36,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196670579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:21:36,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101579852] [2022-01-31 08:21:36,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:21:36,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:36,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:21:36,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:21:36,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:21:36,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 08:21:36,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:21:36,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 08:21:36,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:21:36,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 08:21:36,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-01-31 08:21:36,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-31 08:21:36,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-31 08:21:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-01-31 08:21:36,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:21:36,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:21:36,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-01-31 08:21:36,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-01-31 08:21:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-01-31 08:21:36,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101579852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:21:36,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:21:36,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2022-01-31 08:21:36,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900611543] [2022-01-31 08:21:36,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:21:36,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:21:36,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:21:36,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:21:36,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:21:36,548 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:36,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:21:36,902 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2022-01-31 08:21:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 08:21:36,903 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 08:21:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:21:36,907 INFO L225 Difference]: With dead ends: 137 [2022-01-31 08:21:36,907 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 08:21:36,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 08:21:36,908 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 366 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:21:36,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 42 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:21:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 08:21:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2022-01-31 08:21:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.3) internal successors, (143), 110 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:21:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2022-01-31 08:21:36,920 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 79 [2022-01-31 08:21:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:21:36,920 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2022-01-31 08:21:36,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2022-01-31 08:21:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 08:21:36,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:21:36,921 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:21:36,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:21:37,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:37,127 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:21:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:21:37,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1791852656, now seen corresponding path program 1 times [2022-01-31 08:21:37,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:21:37,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554745717] [2022-01-31 08:21:37,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:21:37,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:21:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:37,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:21:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 08:21:37,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:21:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554745717] [2022-01-31 08:21:37,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554745717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:21:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836842785] [2022-01-31 08:21:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:21:37,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:37,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:21:37,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:21:37,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:21:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:37,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:21:37,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:21:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 08:21:37,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:21:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 08:21:37,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836842785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:21:37,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:21:37,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 08:21:37,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901806472] [2022-01-31 08:21:37,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:21:37,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:21:37,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:21:37,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:21:37,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:21:37,731 INFO L87 Difference]: Start difference. First operand 116 states and 148 transitions. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:21:38,272 INFO L93 Difference]: Finished difference Result 259 states and 337 transitions. [2022-01-31 08:21:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 08:21:38,274 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 08:21:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:21:38,275 INFO L225 Difference]: With dead ends: 259 [2022-01-31 08:21:38,275 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 08:21:38,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 08:21:38,276 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 709 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:21:38,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 49 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:21:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 08:21:38,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 227. [2022-01-31 08:21:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.3122171945701357) internal successors, (290), 221 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:21:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 295 transitions. [2022-01-31 08:21:38,284 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 295 transitions. Word has length 82 [2022-01-31 08:21:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:21:38,284 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 295 transitions. [2022-01-31 08:21:38,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 295 transitions. [2022-01-31 08:21:38,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 08:21:38,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:21:38,286 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:21:38,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:21:38,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:38,496 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:21:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:21:38,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1742050995, now seen corresponding path program 2 times [2022-01-31 08:21:38,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:21:38,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809321875] [2022-01-31 08:21:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:21:38,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:21:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:38,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:21:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 08:21:38,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:21:38,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809321875] [2022-01-31 08:21:38,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809321875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:21:38,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743112523] [2022-01-31 08:21:38,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:21:38,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:38,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:21:38,805 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:21:38,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:21:38,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:21:38,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:21:38,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 08:21:38,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:21:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 08:21:39,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:21:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 08:21:39,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743112523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:21:39,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:21:39,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 08:21:39,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536704836] [2022-01-31 08:21:39,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:21:39,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 08:21:39,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:21:39,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 08:21:39,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 08:21:39,992 INFO L87 Difference]: Start difference. First operand 227 states and 295 transitions. Second operand has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:41,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:21:41,516 INFO L93 Difference]: Finished difference Result 523 states and 685 transitions. [2022-01-31 08:21:41,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 08:21:41,516 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-01-31 08:21:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:21:41,518 INFO L225 Difference]: With dead ends: 523 [2022-01-31 08:21:41,518 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 08:21:41,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 08:21:41,521 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1452 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:21:41,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 44 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:21:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 08:21:41,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 455. [2022-01-31 08:21:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 449 states have (on average 1.3140311804008908) internal successors, (590), 449 states have internal predecessors, (590), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:21:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 595 transitions. [2022-01-31 08:21:41,542 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 595 transitions. Word has length 157 [2022-01-31 08:21:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:21:41,542 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 595 transitions. [2022-01-31 08:21:41,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:41,542 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 595 transitions. [2022-01-31 08:21:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-31 08:21:41,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:21:41,547 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:21:41,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:21:41,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:41,761 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:21:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:21:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash 813602829, now seen corresponding path program 3 times [2022-01-31 08:21:41,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:21:41,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069698973] [2022-01-31 08:21:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:21:41,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:21:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:42,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:21:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-01-31 08:21:42,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:21:42,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069698973] [2022-01-31 08:21:42,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069698973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:21:42,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723321066] [2022-01-31 08:21:42,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:21:42,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:42,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:21:42,692 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:21:42,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:21:44,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-01-31 08:21:44,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:21:44,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 08:21:44,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:21:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-31 08:21:44,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:21:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-31 08:21:46,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723321066] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:21:46,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:21:46,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 26, 26] total 75 [2022-01-31 08:21:46,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419282295] [2022-01-31 08:21:46,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:21:46,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 08:21:46,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:21:46,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 08:21:46,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 08:21:46,047 INFO L87 Difference]: Start difference. First operand 455 states and 595 transitions. Second operand has 75 states, 75 states have (on average 5.253333333333333) internal successors, (394), 74 states have internal predecessors, (394), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:21:49,399 INFO L93 Difference]: Finished difference Result 807 states and 1025 transitions. [2022-01-31 08:21:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 08:21:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 5.253333333333333) internal successors, (394), 74 states have internal predecessors, (394), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-01-31 08:21:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:21:49,403 INFO L225 Difference]: With dead ends: 807 [2022-01-31 08:21:49,403 INFO L226 Difference]: Without dead ends: 807 [2022-01-31 08:21:49,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7958, Invalid=13212, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 08:21:49,408 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3085 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3086 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:21:49,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3086 Valid, 45 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 08:21:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-31 08:21:49,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 799. [2022-01-31 08:21:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 793 states have (on average 1.2723833543505674) internal successors, (1009), 793 states have internal predecessors, (1009), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:21:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1014 transitions. [2022-01-31 08:21:49,421 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1014 transitions. Word has length 313 [2022-01-31 08:21:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:21:49,422 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 1014 transitions. [2022-01-31 08:21:49,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 5.253333333333333) internal successors, (394), 74 states have internal predecessors, (394), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:21:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1014 transitions. [2022-01-31 08:21:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-01-31 08:21:49,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:21:49,429 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:21:49,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:21:49,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:49,645 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:21:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:21:49,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1003373139, now seen corresponding path program 4 times [2022-01-31 08:21:49,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:21:49,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806171864] [2022-01-31 08:21:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:21:49,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:21:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:51,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:21:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:21:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-01-31 08:21:51,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:21:51,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806171864] [2022-01-31 08:21:51,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806171864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:21:51,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315639881] [2022-01-31 08:21:51,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:21:51,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:21:51,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:21:51,397 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:21:51,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:21:51,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:21:51,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:21:51,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-31 08:21:51,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:21:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-01-31 08:21:52,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:21:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-01-31 08:21:57,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315639881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:21:57,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:21:57,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-01-31 08:21:57,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541704045] [2022-01-31 08:21:57,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:21:57,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 08:21:57,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:21:57,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 08:21:57,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 08:21:57,401 INFO L87 Difference]: Start difference. First operand 799 states and 1014 transitions. Second operand has 148 states, 148 states have (on average 4.9391891891891895) internal successors, (731), 147 states have internal predecessors, (731), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:22:12,592 INFO L93 Difference]: Finished difference Result 1601 states and 2106 transitions. [2022-01-31 08:22:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 08:22:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 4.9391891891891895) internal successors, (731), 147 states have internal predecessors, (731), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 582 [2022-01-31 08:22:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:22:12,597 INFO L225 Difference]: With dead ends: 1601 [2022-01-31 08:22:12,597 INFO L226 Difference]: Without dead ends: 1601 [2022-01-31 08:22:12,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13278 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=31902, Invalid=53070, Unknown=0, NotChecked=0, Total=84972 [2022-01-31 08:22:12,602 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6117 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 1199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6117 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1199 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:22:12,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6117 Valid, 49 Invalid, 2999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1199 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 08:22:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2022-01-31 08:22:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1386. [2022-01-31 08:22:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1380 states have (on average 1.315217391304348) internal successors, (1815), 1380 states have internal predecessors, (1815), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:22:12,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 1820 transitions. [2022-01-31 08:22:12,619 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 1820 transitions. Word has length 582 [2022-01-31 08:22:12,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:22:12,619 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 1820 transitions. [2022-01-31 08:22:12,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 4.9391891891891895) internal successors, (731), 147 states have internal predecessors, (731), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 1820 transitions. [2022-01-31 08:22:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2022-01-31 08:22:12,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:22:12,638 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 144, 144, 144, 73, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:22:12,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 08:22:12,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:12,856 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:22:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:22:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash -853843344, now seen corresponding path program 5 times [2022-01-31 08:22:12,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:22:12,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544441418] [2022-01-31 08:22:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:22:12,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:22:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:18,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:22:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 59436 backedges. 0 proven. 51624 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-01-31 08:22:18,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:22:18,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544441418] [2022-01-31 08:22:18,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544441418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:22:18,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402013851] [2022-01-31 08:22:18,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:22:18,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:18,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:22:18,994 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:22:18,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process