/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/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:00:55,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:00:55,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:00:55,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 15:00:55,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 15:00:55,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 15:00:55,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 15:00:55,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 15:00:55,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 15:00:55,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 15:00:55,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 15:00:55,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 15:00:55,233 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 15:00:55,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 15:00:55,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 15:00:55,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 15:00:55,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 15:00:55,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 15:00:55,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:00:55,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:00:55,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:00:55,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:00:55,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:00:55,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:00:55,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:00:55,251 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:00:55,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:00:55,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:00:55,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:00:55,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:00:55,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:00:55,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:00:55,252 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:00:55,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:00:55,252 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:00:55,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:00:55,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:00:55,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:00:55,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:00:55,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:00:55,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:00:55,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:00:55,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:00:55,253 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:00:55,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:00:55,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:00:55,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:00:55,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:00:55,429 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:00:55,430 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:00:55,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2022-03-17 15:00:55,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45561881f/9044c7bd7fb14299b438fa9c35a78179/FLAG82cad576f [2022-03-17 15:00:55,773 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:00:55,774 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i [2022-03-17 15:00:55,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45561881f/9044c7bd7fb14299b438fa9c35a78179/FLAG82cad576f [2022-03-17 15:00:56,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45561881f/9044c7bd7fb14299b438fa9c35a78179 [2022-03-17 15:00:56,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:00:56,232 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:00:56,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:00:56,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:00:56,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:00:56,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:00:56" (1/1) ... [2022-03-17 15:00:56,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d122b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:56, skipping insertion in model container [2022-03-17 15:00:56,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:00:56" (1/1) ... [2022-03-17 15:00:56,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:00:56,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:00:56,393 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i[895,908] [2022-03-17 15:00:56,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:00:56,409 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:00:56,417 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i[895,908] [2022-03-17 15:00:56,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:00:56,430 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:00:56,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:56 WrapperNode [2022-03-17 15:00:56,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:00:56,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:00:56,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:00:56,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:00:56,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:56" (1/1) ... [2022-03-17 15:00:56,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:56" (1/1) ... [2022-03-17 15:00:56,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:56" (1/1) ... [2022-03-17 15:00:56,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:56" (1/1) ... [2022-03-17 15:00:56,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:56" (1/1) ... [2022-03-17 15:00:56,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:56" (1/1) ... [2022-03-17 15:00:56,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:56" (1/1) ... [2022-03-17 15:00:56,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:00:56,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:00:56,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:00:56,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:00:56,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:56" (1/1) ... [2022-03-17 15:00:56,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:00:56,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:56,491 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) [2022-03-17 15:00:56,519 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 [2022-03-17 15:00:56,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:00:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:00:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:00:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 15:00:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:00:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:00:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:00:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:00:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 15:00:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 15:00:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:00:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:00:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 15:00:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:00:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 15:00:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:00:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:00:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:00:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:00:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:00:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:00:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:00:56,592 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:00:56,593 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:00:56,700 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:00:56,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:00:56,704 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 15:00:56,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:00:56 BoogieIcfgContainer [2022-03-17 15:00:56,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:00:56,706 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:00:56,706 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:00:56,707 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:00:56,708 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:00:56" (1/1) ... [2022-03-17 15:00:56,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:00:56 BasicIcfg [2022-03-17 15:00:56,726 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:00:56,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:00:56,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:00:56,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:00:56,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:00:56" (1/4) ... [2022-03-17 15:00:56,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab1422f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:00:56, skipping insertion in model container [2022-03-17 15:00:56,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:00:56" (2/4) ... [2022-03-17 15:00:56,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab1422f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:00:56, skipping insertion in model container [2022-03-17 15:00:56,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:00:56" (3/4) ... [2022-03-17 15:00:56,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab1422f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:00:56, skipping insertion in model container [2022-03-17 15:00:56,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:00:56" (4/4) ... [2022-03-17 15:00:56,748 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.iJordan [2022-03-17 15:00:56,752 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:00:56,752 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:00:56,790 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:00:56,794 INFO L340 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 [2022-03-17 15:00:56,794 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:00:56,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-03-17 15:00:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 15:00:56,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:56,810 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:56,811 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:56,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2102751182, now seen corresponding path program 1 times [2022-03-17 15:00:56,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:56,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170465636] [2022-03-17 15:00:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:56,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:56,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:56,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170465636] [2022-03-17 15:00:56,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170465636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:00:56,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:00:56,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:00:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639681589] [2022-03-17 15:00:56,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:00:56,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:00:56,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:56,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:00:56,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:00:56,972 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-17 15:00:56,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:56,998 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-03-17 15:00:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:00:57,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-03-17 15:00:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:57,004 INFO L225 Difference]: With dead ends: 20 [2022-03-17 15:00:57,005 INFO L226 Difference]: Without dead ends: 13 [2022-03-17 15:00:57,008 INFO L911 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 [2022-03-17 15:00:57,011 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 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 [2022-03-17 15:00:57,012 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:00:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-17 15:00:57,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-17 15:00:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-17 15:00:57,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-17 15:00:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:57,032 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-17 15:00:57,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-17 15:00:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-17 15:00:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 15:00:57,033 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:57,033 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:57,034 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:00:57,034 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2101827661, now seen corresponding path program 1 times [2022-03-17 15:00:57,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:57,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149363547] [2022-03-17 15:00:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:57,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:57,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:57,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:57,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149363547] [2022-03-17 15:00:57,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149363547] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:00:57,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:00:57,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 15:00:57,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501477620] [2022-03-17 15:00:57,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:00:57,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 15:00:57,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:57,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 15:00:57,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 15:00:57,104 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-17 15:00:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:57,135 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-03-17 15:00:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 15:00:57,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-03-17 15:00:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:57,136 INFO L225 Difference]: With dead ends: 15 [2022-03-17 15:00:57,136 INFO L226 Difference]: Without dead ends: 15 [2022-03-17 15:00:57,136 INFO L911 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 [2022-03-17 15:00:57,137 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:57,138 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:00:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-17 15:00:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-17 15:00:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-17 15:00:57,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-17 15:00:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:57,140 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-17 15:00:57,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-17 15:00:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-17 15:00:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 15:00:57,141 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:57,141 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:57,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 15:00:57,141 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash -311341615, now seen corresponding path program 1 times [2022-03-17 15:00:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:57,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683344798] [2022-03-17 15:00:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:57,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:57,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:57,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683344798] [2022-03-17 15:00:57,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683344798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:00:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897050873] [2022-03-17 15:00:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:57,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:57,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:57,182 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) [2022-03-17 15:00:57,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 15:00:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:57,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 15:00:57,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:00:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:57,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:00:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:00:57,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897050873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:00:57,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:00:57,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-17 15:00:57,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088732209] [2022-03-17 15:00:57,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:00:57,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 15:00:57,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:57,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 15:00:57,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 15:00:57,308 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-03-17 15:00:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:57,359 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-03-17 15:00:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 15:00:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 13 [2022-03-17 15:00:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:57,360 INFO L225 Difference]: With dead ends: 20 [2022-03-17 15:00:57,360 INFO L226 Difference]: Without dead ends: 20 [2022-03-17 15:00:57,361 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-17 15:00:57,361 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:57,362 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:00:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-17 15:00:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-17 15:00:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-17 15:00:57,364 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-03-17 15:00:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:57,364 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-17 15:00:57,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-03-17 15:00:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-17 15:00:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-17 15:00:57,365 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:57,365 INFO L500 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:57,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 15:00:57,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:57,584 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1743415465, now seen corresponding path program 1 times [2022-03-17 15:00:57,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:57,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260647712] [2022-03-17 15:00:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:57,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:57,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:00:57,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:57,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260647712] [2022-03-17 15:00:57,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260647712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:00:57,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411268437] [2022-03-17 15:00:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:57,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:57,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:57,651 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) [2022-03-17 15:00:57,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 15:00:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:57,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 15:00:57,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:00:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:00:57,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:00:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:00:57,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411268437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:00:57,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:00:57,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-17 15:00:57,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573056701] [2022-03-17 15:00:57,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:00:57,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 15:00:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 15:00:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-17 15:00:57,863 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-03-17 15:00:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:57,952 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-03-17 15:00:57,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 15:00:57,952 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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 19 [2022-03-17 15:00:57,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:57,954 INFO L225 Difference]: With dead ends: 28 [2022-03-17 15:00:57,954 INFO L226 Difference]: Without dead ends: 28 [2022-03-17 15:00:57,954 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-17 15:00:57,957 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:57,958 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:00:57,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-17 15:00:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-17 15:00:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-17 15:00:57,967 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-03-17 15:00:57,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:57,968 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-17 15:00:57,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-03-17 15:00:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-17 15:00:57,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 15:00:57,970 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:57,970 INFO L500 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:57,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 15:00:58,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 15:00:58,187 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:58,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1783682015, now seen corresponding path program 2 times [2022-03-17 15:00:58,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:58,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431986458] [2022-03-17 15:00:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:58,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:58,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:00:58,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:58,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431986458] [2022-03-17 15:00:58,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431986458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:00:58,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694553758] [2022-03-17 15:00:58,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:00:58,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:58,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:58,306 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) [2022-03-17 15:00:58,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 15:00:58,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:00:58,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:00:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 15:00:58,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:00:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:00:58,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:00:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:00:58,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694553758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:00:58,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:00:58,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-17 15:00:58,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370733631] [2022-03-17 15:00:58,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:00:58,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 15:00:58,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 15:00:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:00:58,558 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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) [2022-03-17 15:00:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:58,738 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-03-17 15:00:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 15:00:58,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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 27 [2022-03-17 15:00:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:58,739 INFO L225 Difference]: With dead ends: 44 [2022-03-17 15:00:58,740 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 15:00:58,740 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-17 15:00:58,741 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:58,741 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 24 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:00:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 15:00:58,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-17 15:00:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-17 15:00:58,744 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-03-17 15:00:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:58,744 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-17 15:00:58,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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) [2022-03-17 15:00:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-17 15:00:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-17 15:00:58,745 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:58,745 INFO L500 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:58,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 15:00:58,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:58,956 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:58,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1181496559, now seen corresponding path program 3 times [2022-03-17 15:00:58,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:58,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805893757] [2022-03-17 15:00:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:58,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:59,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:00:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:00:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:00:59,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:00:59,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805893757] [2022-03-17 15:00:59,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805893757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:00:59,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100732995] [2022-03-17 15:00:59,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 15:00:59,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:59,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:00:59,143 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) [2022-03-17 15:00:59,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 15:00:59,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-17 15:00:59,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:00:59,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 15:00:59,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:00:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-17 15:00:59,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:00:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-17 15:00:59,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100732995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:00:59,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:00:59,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-03-17 15:00:59,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229013403] [2022-03-17 15:00:59,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:00:59,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 15:00:59,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:00:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 15:00:59,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-17 15:00:59,397 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 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) [2022-03-17 15:00:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:00:59,743 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-17 15:00:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 15:00:59,744 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 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 43 [2022-03-17 15:00:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:00:59,745 INFO L225 Difference]: With dead ends: 54 [2022-03-17 15:00:59,745 INFO L226 Difference]: Without dead ends: 54 [2022-03-17 15:00:59,746 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-03-17 15:00:59,747 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:00:59,747 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 28 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:00:59,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-17 15:00:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-17 15:00:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:00:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-03-17 15:00:59,750 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2022-03-17 15:00:59,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:00:59,751 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-03-17 15:00:59,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 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) [2022-03-17 15:00:59,751 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-03-17 15:00:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-17 15:00:59,752 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:00:59,752 INFO L500 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:00:59,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 15:00:59,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:00:59,968 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:00:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:00:59,969 INFO L85 PathProgramCache]: Analyzing trace with hash 91100323, now seen corresponding path program 4 times [2022-03-17 15:00:59,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:00:59,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544804254] [2022-03-17 15:00:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:00:59,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:00:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:00,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 15:01:00,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:00,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544804254] [2022-03-17 15:01:00,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544804254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:00,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22310809] [2022-03-17 15:01:00,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 15:01:00,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:00,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:00,141 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) [2022-03-17 15:01:00,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 15:01:00,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 15:01:00,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 15:01:00,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 15:01:00,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 15:01:00,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22310809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:00,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:00,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-17 15:01:00,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953358147] [2022-03-17 15:01:00,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:00,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-17 15:01:00,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:00,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-17 15:01:00,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-17 15:01:00,577 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 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) [2022-03-17 15:01:01,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:01,103 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-03-17 15:01:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-17 15:01:01,103 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 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 53 [2022-03-17 15:01:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:01,104 INFO L225 Difference]: With dead ends: 88 [2022-03-17 15:01:01,104 INFO L226 Difference]: Without dead ends: 88 [2022-03-17 15:01:01,105 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-17 15:01:01,106 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:01,106 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 44 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:01:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-17 15:01:01,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-17 15:01:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:01:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-03-17 15:01:01,110 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 53 [2022-03-17 15:01:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:01,110 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-03-17 15:01:01,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 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) [2022-03-17 15:01:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-03-17 15:01:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-17 15:01:01,111 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:01,112 INFO L500 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:01,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:01,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:01,323 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:01,324 INFO L85 PathProgramCache]: Analyzing trace with hash 303694625, now seen corresponding path program 5 times [2022-03-17 15:01:01,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:01,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442290522] [2022-03-17 15:01:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:01,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:01,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 15:01:01,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:01,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442290522] [2022-03-17 15:01:01,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442290522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:01,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991002625] [2022-03-17 15:01:01,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 15:01:01,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:01,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:01,779 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) [2022-03-17 15:01:01,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 15:01:01,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-03-17 15:01:01,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:01,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-17 15:01:01,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 15:01:01,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 15:01:02,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991002625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:02,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:02,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 54 [2022-03-17 15:01:02,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499654330] [2022-03-17 15:01:02,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:02,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-17 15:01:02,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-17 15:01:02,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-17 15:01:02,590 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 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) [2022-03-17 15:01:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:03,540 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-03-17 15:01:03,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-17 15:01:03,541 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 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 87 [2022-03-17 15:01:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:03,542 INFO L225 Difference]: With dead ends: 124 [2022-03-17 15:01:03,542 INFO L226 Difference]: Without dead ends: 124 [2022-03-17 15:01:03,544 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-03-17 15:01:03,545 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:03,545 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 49 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:01:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-17 15:01:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-17 15:01:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0588235294117647) internal successors, (126), 119 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:01:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2022-03-17 15:01:03,555 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 87 [2022-03-17 15:01:03,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:03,555 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2022-03-17 15:01:03,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 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) [2022-03-17 15:01:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2022-03-17 15:01:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-17 15:01:03,556 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:03,556 INFO L500 BasicCegarLoop]: trace histogram [56, 50, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:03,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:03,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:03,773 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:03,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:03,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1836286909, now seen corresponding path program 6 times [2022-03-17 15:01:03,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:03,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415886539] [2022-03-17 15:01:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:03,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:04,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:04,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:04,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415886539] [2022-03-17 15:01:04,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415886539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:04,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519521151] [2022-03-17 15:01:04,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 15:01:04,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:04,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:04,764 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) [2022-03-17 15:01:04,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 15:01:04,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-17 15:01:04,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:04,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 15:01:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-17 15:01:04,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-17 15:01:05,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519521151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:05,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:05,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 9, 9] total 67 [2022-03-17 15:01:05,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586978806] [2022-03-17 15:01:05,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:05,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-17 15:01:05,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-17 15:01:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-03-17 15:01:05,367 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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) [2022-03-17 15:01:06,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:06,818 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2022-03-17 15:01:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-17 15:01:06,818 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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 123 [2022-03-17 15:01:06,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:06,819 INFO L225 Difference]: With dead ends: 140 [2022-03-17 15:01:06,819 INFO L226 Difference]: Without dead ends: 140 [2022-03-17 15:01:06,822 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-03-17 15:01:06,822 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 134 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:06,822 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 48 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:01:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-17 15:01:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-03-17 15:01:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 135 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:01:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2022-03-17 15:01:06,827 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 123 [2022-03-17 15:01:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:06,827 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2022-03-17 15:01:06,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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) [2022-03-17 15:01:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2022-03-17 15:01:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-17 15:01:06,828 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:06,828 INFO L500 BasicCegarLoop]: trace histogram [64, 50, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:06,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 15:01:07,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:07,045 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:07,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1500719781, now seen corresponding path program 7 times [2022-03-17 15:01:07,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:07,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463997776] [2022-03-17 15:01:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:07,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:08,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:08,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:08,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463997776] [2022-03-17 15:01:08,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463997776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:08,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223324502] [2022-03-17 15:01:08,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 15:01:08,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:08,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:08,489 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) [2022-03-17 15:01:08,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 15:01:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:08,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-17 15:01:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:08,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:01:10,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223324502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:10,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:10,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 104 [2022-03-17 15:01:10,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011068865] [2022-03-17 15:01:10,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:10,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-17 15:01:10,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:10,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-17 15:01:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-17 15:01:10,395 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 104 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 103 states have internal predecessors, (225), 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) [2022-03-17 15:01:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:13,319 INFO L93 Difference]: Finished difference Result 212 states and 262 transitions. [2022-03-17 15:01:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-17 15:01:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 103 states have internal predecessors, (225), 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 139 [2022-03-17 15:01:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:13,324 INFO L225 Difference]: With dead ends: 212 [2022-03-17 15:01:13,324 INFO L226 Difference]: Without dead ends: 212 [2022-03-17 15:01:13,328 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5906 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2022-03-17 15:01:13,328 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:13,329 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 58 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 15:01:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-17 15:01:13,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-17 15:01:13,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2463768115942029) internal successors, (258), 207 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:01:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 262 transitions. [2022-03-17 15:01:13,359 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 262 transitions. Word has length 139 [2022-03-17 15:01:13,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:13,359 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 262 transitions. [2022-03-17 15:01:13,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 103 states have internal predecessors, (225), 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) [2022-03-17 15:01:13,359 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 262 transitions. [2022-03-17 15:01:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-17 15:01:13,361 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:13,361 INFO L500 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:13,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:13,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 15:01:13,580 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:13,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:13,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1560556615, now seen corresponding path program 8 times [2022-03-17 15:01:13,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:13,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281065468] [2022-03-17 15:01:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:13,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:14,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-17 15:01:14,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:14,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281065468] [2022-03-17 15:01:14,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281065468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:01:14,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311566821] [2022-03-17 15:01:14,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:01:14,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:14,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:01:14,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:01:14,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 15:01:14,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:01:14,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:01:14,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-17 15:01:14,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:01:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-17 15:01:15,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:01:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-17 15:01:16,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311566821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:01:16,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:01:16,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 58 [2022-03-17 15:01:16,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476375814] [2022-03-17 15:01:16,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:01:16,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-17 15:01:16,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-17 15:01:16,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2022-03-17 15:01:16,152 INFO L87 Difference]: Start difference. First operand 212 states and 262 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:01:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:19,238 INFO L93 Difference]: Finished difference Result 2866 states and 4241 transitions. [2022-03-17 15:01:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-17 15:01:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-03-17 15:01:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:19,246 INFO L225 Difference]: With dead ends: 2866 [2022-03-17 15:01:19,246 INFO L226 Difference]: Without dead ends: 2863 [2022-03-17 15:01:19,248 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 417 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=332, Invalid=11878, Unknown=0, NotChecked=0, Total=12210 [2022-03-17 15:01:19,248 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 164 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 8486 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 8486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:19,248 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 384 Invalid, 8540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 8486 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-17 15:01:19,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-03-17 15:01:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 214. [2022-03-17 15:01:19,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.2488038277511961) internal successors, (261), 209 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:01:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 265 transitions. [2022-03-17 15:01:19,265 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 265 transitions. Word has length 211 [2022-03-17 15:01:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:19,266 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 265 transitions. [2022-03-17 15:01:19,266 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:01:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 265 transitions. [2022-03-17 15:01:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-17 15:01:19,269 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:01:19,269 INFO L500 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:01:19,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 15:01:19,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:01:19,483 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:01:19,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:01:19,484 INFO L85 PathProgramCache]: Analyzing trace with hash 187719926, now seen corresponding path program 9 times [2022-03-17 15:01:19,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:01:19,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488594796] [2022-03-17 15:01:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:01:19,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:01:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:20,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:01:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:01:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-17 15:01:20,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:01:20,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488594796] [2022-03-17 15:01:20,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488594796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:01:20,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:01:20,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-17 15:01:20,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887020472] [2022-03-17 15:01:20,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:01:20,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-17 15:01:20,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:01:20,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-17 15:01:20,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-17 15:01:20,289 INFO L87 Difference]: Start difference. First operand 214 states and 265 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 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) [2022-03-17 15:01:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:01:21,092 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2022-03-17 15:01:21,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-17 15:01:21,093 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 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 213 [2022-03-17 15:01:21,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:01:21,093 INFO L225 Difference]: With dead ends: 207 [2022-03-17 15:01:21,093 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 15:01:21,095 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-03-17 15:01:21,095 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:01:21,095 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:01:21,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 15:01:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 15:01:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 15:01:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 15:01:21,096 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 213 [2022-03-17 15:01:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:01:21,096 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 15:01:21,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 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) [2022-03-17 15:01:21,096 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 15:01:21,096 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 15:01:21,098 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 15:01:21,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-17 15:01:21,100 INFO L718 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1] [2022-03-17 15:01:21,101 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 15:01:21,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:01:21 BasicIcfg [2022-03-17 15:01:21,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 15:01:21,105 INFO L158 Benchmark]: Toolchain (without parser) took 24872.63ms. Allocated memory was 175.1MB in the beginning and 253.8MB in the end (delta: 78.6MB). Free memory was 126.1MB in the beginning and 126.6MB in the end (delta: -418.8kB). Peak memory consumption was 79.0MB. Max. memory is 8.0GB. [2022-03-17 15:01:21,105 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 175.1MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 15:01:21,105 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.57ms. Allocated memory is still 175.1MB. Free memory was 125.9MB in the beginning and 152.4MB in the end (delta: -26.5MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. [2022-03-17 15:01:21,105 INFO L158 Benchmark]: Boogie Preprocessor took 27.66ms. Allocated memory is still 175.1MB. Free memory was 152.4MB in the beginning and 150.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 15:01:21,106 INFO L158 Benchmark]: RCFGBuilder took 246.11ms. Allocated memory is still 175.1MB. Free memory was 150.9MB in the beginning and 140.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 15:01:21,106 INFO L158 Benchmark]: IcfgTransformer took 20.47ms. Allocated memory is still 175.1MB. Free memory was 140.9MB in the beginning and 139.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 15:01:21,107 INFO L158 Benchmark]: TraceAbstraction took 24377.32ms. Allocated memory was 175.1MB in the beginning and 253.8MB in the end (delta: 78.6MB). Free memory was 139.1MB in the beginning and 126.6MB in the end (delta: 12.6MB). Peak memory consumption was 92.8MB. Max. memory is 8.0GB. [2022-03-17 15:01:21,111 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 175.1MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 191.57ms. Allocated memory is still 175.1MB. Free memory was 125.9MB in the beginning and 152.4MB in the end (delta: -26.5MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.66ms. Allocated memory is still 175.1MB. Free memory was 152.4MB in the beginning and 150.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 246.11ms. Allocated memory is still 175.1MB. Free memory was 150.9MB in the beginning and 140.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 20.47ms. Allocated memory is still 175.1MB. Free memory was 140.9MB in the beginning and 139.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 24377.32ms. Allocated memory was 175.1MB in the beginning and 253.8MB in the end (delta: 78.6MB). Free memory was 139.1MB in the beginning and 126.6MB in the end (delta: 12.6MB). Peak memory consumption was 92.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 24.3s, OverallIterations: 12, TraceHistogramMax: 101, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 10.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 747 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 746 mSDsluCounter, 760 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 515 mSDsCounter, 1230 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9796 IncrementalHoareTripleChecker+Invalid, 11026 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1230 mSolverCounterUnsat, 245 mSDtfsCounter, 9796 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2233 GetRequests, 1415 SyntacticMatches, 8 SemanticMatches, 810 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13368 ImplicationChecksByTransitivity, 13.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=11, InterpolantAutomatonStates: 431, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 2649 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 1665 NumberOfCodeBlocks, 1583 NumberOfCodeBlocksAsserted, 93 NumberOfCheckSat, 2350 ConstructedInterpolants, 0 QuantifiedInterpolants, 8130 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1685 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 26464/68563 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-17 15:01:21,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...