/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/nla-digbench-scaling/egcd2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 05:43:04,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 05:43:04,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 05:43:04,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 05:43:04,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 05:43:04,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 05:43:04,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 05:43:04,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 05:43:04,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 05:43:04,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 05:43:04,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 05:43:04,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 05:43:04,637 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 05:43:04,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 05:43:04,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 05:43:04,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 05:43:04,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 05:43:04,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 05:43:04,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 05:43:04,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 05:43:04,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 05:43:04,651 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 05:43:04,659 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 05:43:04,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 05:43:04,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 05:43:04,661 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 05:43:04,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 05:43:04,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 05:43:04,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 05:43:04,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 05:43:04,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 05:43:04,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 05:43:04,663 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 05:43:04,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 05:43:04,663 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 05:43:04,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 05:43:04,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 05:43:04,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 05:43:04,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 05:43:04,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 05:43:04,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:43:04,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 05:43:04,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 05:43:04,664 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 05:43:04,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 05:43:04,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 05:43:04,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 05:43:04,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 05:43:04,838 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 05:43:04,840 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 05:43:04,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-03-20 05:43:04,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f4bd4d05/7221a6f4d6a146538fbdc11bea5ea9a2/FLAGce96699f1 [2022-03-20 05:43:05,228 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 05:43:05,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-03-20 05:43:05,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f4bd4d05/7221a6f4d6a146538fbdc11bea5ea9a2/FLAGce96699f1 [2022-03-20 05:43:05,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f4bd4d05/7221a6f4d6a146538fbdc11bea5ea9a2 [2022-03-20 05:43:05,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 05:43:05,245 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 05:43:05,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 05:43:05,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 05:43:05,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 05:43:05,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:43:05" (1/1) ... [2022-03-20 05:43:05,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63fa832e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:05, skipping insertion in model container [2022-03-20 05:43:05,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:43:05" (1/1) ... [2022-03-20 05:43:05,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 05:43:05,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 05:43:05,381 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2022-03-20 05:43:05,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:43:05,402 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 05:43:05,409 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2022-03-20 05:43:05,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:43:05,428 INFO L208 MainTranslator]: Completed translation [2022-03-20 05:43:05,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:05 WrapperNode [2022-03-20 05:43:05,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 05:43:05,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 05:43:05,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 05:43:05,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 05:43:05,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:05" (1/1) ... [2022-03-20 05:43:05,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:05" (1/1) ... [2022-03-20 05:43:05,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:05" (1/1) ... [2022-03-20 05:43:05,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:05" (1/1) ... [2022-03-20 05:43:05,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:05" (1/1) ... [2022-03-20 05:43:05,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:05" (1/1) ... [2022-03-20 05:43:05,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:05" (1/1) ... [2022-03-20 05:43:05,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 05:43:05,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 05:43:05,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 05:43:05,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 05:43:05,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:05" (1/1) ... [2022-03-20 05:43:05,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:43:05,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:05,500 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) [2022-03-20 05:43:05,506 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 [2022-03-20 05:43:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 05:43:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 05:43:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 05:43:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 05:43:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 05:43:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 05:43:05,526 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 05:43:05,526 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 05:43:05,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 05:43:05,571 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 05:43:05,572 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 05:43:05,698 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 05:43:05,706 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 05:43:05,706 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 05:43:05,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:43:05 BoogieIcfgContainer [2022-03-20 05:43:05,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 05:43:05,708 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 05:43:05,708 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 05:43:05,709 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 05:43:05,711 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:43:05" (1/1) ... [2022-03-20 05:43:05,720 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 05:43:05,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:43:05 BasicIcfg [2022-03-20 05:43:05,746 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 05:43:05,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 05:43:05,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 05:43:05,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 05:43:05,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:43:05" (1/4) ... [2022-03-20 05:43:05,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341d6bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:43:05, skipping insertion in model container [2022-03-20 05:43:05,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:05" (2/4) ... [2022-03-20 05:43:05,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341d6bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:43:05, skipping insertion in model container [2022-03-20 05:43:05,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:43:05" (3/4) ... [2022-03-20 05:43:05,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341d6bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:43:05, skipping insertion in model container [2022-03-20 05:43:05,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:43:05" (4/4) ... [2022-03-20 05:43:05,751 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.cJordan [2022-03-20 05:43:05,754 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 05:43:05,754 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 05:43:05,786 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 05:43:05,795 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 [2022-03-20 05:43:05,796 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 05:43:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 05:43:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 05:43:05,817 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:05,818 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:05,818 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:05,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-03-20 05:43:05,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:05,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302513976] [2022-03-20 05:43:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:05,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 05:43:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:05,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 05:43:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:05,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 05:43:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:05,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 05:43:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:05,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 05:43:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:05,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 05:43:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:06,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 05:43:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 05:43:06,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:06,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302513976] [2022-03-20 05:43:06,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302513976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:06,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:06,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 05:43:06,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857250430] [2022-03-20 05:43:06,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:06,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 05:43:06,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:06,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 05:43:06,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 05:43:06,035 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:43:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:06,125 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-03-20 05:43:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 05:43:06,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-20 05:43:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:06,132 INFO L225 Difference]: With dead ends: 40 [2022-03-20 05:43:06,132 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 05:43:06,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 05:43:06,135 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:06,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 05:43:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 05:43:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 05:43:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-20 05:43:06,159 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-20 05:43:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:06,159 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-20 05:43:06,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:43:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-20 05:43:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 05:43:06,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:06,162 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:06,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 05:43:06,162 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-03-20 05:43:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:06,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383223531] [2022-03-20 05:43:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:06,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:06,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:06,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420845591] [2022-03-20 05:43:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:06,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:06,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:06,181 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) [2022-03-20 05:43:06,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 05:43:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 05:43:06,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 05:43:06,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 05:43:06,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:06,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383223531] [2022-03-20 05:43:06,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420845591] [2022-03-20 05:43:06,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420845591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:06,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:06,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 05:43:06,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023872632] [2022-03-20 05:43:06,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:06,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 05:43:06,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:06,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 05:43:06,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 05:43:06,584 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:43:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:06,672 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-03-20 05:43:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 05:43:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-20 05:43:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:06,676 INFO L225 Difference]: With dead ends: 44 [2022-03-20 05:43:06,676 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 05:43:06,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:43:06,677 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:06,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 124 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 05:43:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 05:43:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 05:43:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-20 05:43:06,697 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-20 05:43:06,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:06,698 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-20 05:43:06,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:43:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-20 05:43:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 05:43:06,701 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:06,701 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:06,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:06,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:06,904 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:06,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:06,904 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-03-20 05:43:06,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:06,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211131544] [2022-03-20 05:43:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:06,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:06,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735997489] [2022-03-20 05:43:06,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:06,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:06,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:06,932 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) [2022-03-20 05:43:06,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 05:43:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:06,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 05:43:06,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 05:43:07,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 05:43:07,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211131544] [2022-03-20 05:43:07,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735997489] [2022-03-20 05:43:07,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735997489] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 05:43:07,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:43:07,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 05:43:07,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878230952] [2022-03-20 05:43:07,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:07,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:43:07,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:07,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:43:07,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:43:07,231 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 05:43:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:07,262 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-03-20 05:43:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:43:07,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-20 05:43:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:07,264 INFO L225 Difference]: With dead ends: 41 [2022-03-20 05:43:07,264 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 05:43:07,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:43:07,266 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:07,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 05:43:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-20 05:43:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 05:43:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-20 05:43:07,282 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-03-20 05:43:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:07,282 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-20 05:43:07,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 05:43:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-20 05:43:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 05:43:07,283 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:07,284 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:07,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:07,495 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,SelfDestructingSolverStorable2 [2022-03-20 05:43:07,496 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:07,496 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-03-20 05:43:07,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:07,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980725683] [2022-03-20 05:43:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:07,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:07,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:07,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115708575] [2022-03-20 05:43:07,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:07,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:07,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:07,513 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) [2022-03-20 05:43:07,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 05:43:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:07,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 05:43:07,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 05:43:07,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:07,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:07,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980725683] [2022-03-20 05:43:07,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:07,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115708575] [2022-03-20 05:43:07,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115708575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:43:07,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:43:07,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 05:43:07,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652398476] [2022-03-20 05:43:07,807 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:07,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 05:43:07,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:07,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 05:43:07,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:43:07,808 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 05:43:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:07,930 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-20 05:43:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 05:43:07,930 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-20 05:43:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:07,931 INFO L225 Difference]: With dead ends: 52 [2022-03-20 05:43:07,931 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 05:43:07,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:43:07,932 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:07,932 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 05:43:07,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-20 05:43:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 05:43:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-03-20 05:43:07,936 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-03-20 05:43:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:07,936 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-03-20 05:43:07,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 05:43:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-03-20 05:43:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 05:43:07,946 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:07,946 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:07,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 05:43:08,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:08,150 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-03-20 05:43:08,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:08,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374088055] [2022-03-20 05:43:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:08,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:08,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:08,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278019170] [2022-03-20 05:43:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:08,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:08,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:08,161 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) [2022-03-20 05:43:08,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 05:43:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:08,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 05:43:08,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 05:43:08,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 05:43:08,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:08,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374088055] [2022-03-20 05:43:08,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:08,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278019170] [2022-03-20 05:43:08,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278019170] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 05:43:08,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:43:08,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 05:43:08,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595099376] [2022-03-20 05:43:08,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:08,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:43:08,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:43:08,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:43:08,468 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 05:43:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:08,498 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-03-20 05:43:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:43:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-03-20 05:43:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:08,499 INFO L225 Difference]: With dead ends: 56 [2022-03-20 05:43:08,499 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 05:43:08,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:43:08,500 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:08,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 05:43:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-20 05:43:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 05:43:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-20 05:43:08,504 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-03-20 05:43:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:08,504 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-20 05:43:08,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 05:43:08,504 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-20 05:43:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 05:43:08,505 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:08,505 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:08,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:08,705 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:08,705 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-03-20 05:43:08,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:08,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159435014] [2022-03-20 05:43:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:08,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:08,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:08,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115109847] [2022-03-20 05:43:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:08,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:08,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:08,720 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) [2022-03-20 05:43:08,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 05:43:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:08,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 05:43:08,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-20 05:43:08,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:09,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:09,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159435014] [2022-03-20 05:43:09,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:09,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115109847] [2022-03-20 05:43:09,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115109847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:43:09,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:43:09,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 05:43:09,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239321965] [2022-03-20 05:43:09,013 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:09,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 05:43:09,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:09,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 05:43:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:43:09,014 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 05:43:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:09,087 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-03-20 05:43:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 05:43:09,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-20 05:43:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:09,088 INFO L225 Difference]: With dead ends: 60 [2022-03-20 05:43:09,088 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 05:43:09,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:43:09,089 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:09,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 05:43:09,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 05:43:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 05:43:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-20 05:43:09,092 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-03-20 05:43:09,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:09,093 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-20 05:43:09,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 05:43:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-20 05:43:09,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 05:43:09,093 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:09,094 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:09,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:09,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:09,300 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-03-20 05:43:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:09,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781067173] [2022-03-20 05:43:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:09,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:09,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:09,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041258799] [2022-03-20 05:43:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:09,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:09,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:09,315 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) [2022-03-20 05:43:09,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 05:43:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:09,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 05:43:09,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 05:43:09,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 05:43:09,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:09,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781067173] [2022-03-20 05:43:09,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:09,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041258799] [2022-03-20 05:43:09,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041258799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:09,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:09,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 05:43:09,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966945736] [2022-03-20 05:43:09,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:09,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 05:43:09,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:09,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 05:43:09,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:43:09,608 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 05:43:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:09,736 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-03-20 05:43:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 05:43:09,737 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-20 05:43:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:09,739 INFO L225 Difference]: With dead ends: 98 [2022-03-20 05:43:09,739 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 05:43:09,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:43:09,740 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:09,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 281 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 05:43:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-20 05:43:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 05:43:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-20 05:43:09,756 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-20 05:43:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:09,757 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-20 05:43:09,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 05:43:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-20 05:43:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 05:43:09,759 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:09,759 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:09,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:09,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:09,976 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-03-20 05:43:09,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:09,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205409882] [2022-03-20 05:43:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:09,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:09,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:09,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858604791] [2022-03-20 05:43:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:09,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:09,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:09,988 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) [2022-03-20 05:43:09,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 05:43:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:10,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 05:43:10,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 05:43:10,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 05:43:10,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:10,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205409882] [2022-03-20 05:43:10,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:10,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858604791] [2022-03-20 05:43:10,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858604791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:10,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:10,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 05:43:10,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846111110] [2022-03-20 05:43:10,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:10,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 05:43:10,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 05:43:10,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-20 05:43:10,338 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 05:43:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:10,519 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2022-03-20 05:43:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 05:43:10,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-03-20 05:43:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:10,522 INFO L225 Difference]: With dead ends: 130 [2022-03-20 05:43:10,522 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 05:43:10,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-20 05:43:10,523 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:10,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 329 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:10,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 05:43:10,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-03-20 05:43:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 05:43:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-03-20 05:43:10,529 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-03-20 05:43:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:10,529 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-03-20 05:43:10,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 05:43:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-03-20 05:43:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 05:43:10,530 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:10,530 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:10,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:10,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:10,739 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-03-20 05:43:10,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:10,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147420674] [2022-03-20 05:43:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:10,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:10,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:10,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926029987] [2022-03-20 05:43:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:43:10,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:10,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:10,767 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) [2022-03-20 05:43:10,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 05:43:10,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:43:10,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:43:10,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 05:43:10,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-20 05:43:11,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-20 05:43:11,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:11,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147420674] [2022-03-20 05:43:11,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:11,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926029987] [2022-03-20 05:43:11,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926029987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:11,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:11,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-20 05:43:11,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893245119] [2022-03-20 05:43:11,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:11,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 05:43:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:11,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 05:43:11,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-20 05:43:11,392 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 05:43:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:12,690 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2022-03-20 05:43:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 05:43:12,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-03-20 05:43:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:12,699 INFO L225 Difference]: With dead ends: 126 [2022-03-20 05:43:12,699 INFO L226 Difference]: Without dead ends: 126 [2022-03-20 05:43:12,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-20 05:43:12,700 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:12,700 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 330 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 05:43:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-20 05:43:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-03-20 05:43:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 05:43:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-03-20 05:43:12,705 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-03-20 05:43:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:12,706 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-03-20 05:43:12,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 05:43:12,706 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-03-20 05:43:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 05:43:12,706 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:12,706 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:12,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:12,922 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,SelfDestructingSolverStorable8 [2022-03-20 05:43:12,923 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:12,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:12,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-03-20 05:43:12,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:12,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519891007] [2022-03-20 05:43:12,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:12,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:12,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:12,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235156407] [2022-03-20 05:43:12,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 05:43:12,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:12,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:12,934 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) [2022-03-20 05:43:12,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 05:43:12,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 05:43:12,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:43:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 05:43:12,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-20 05:43:13,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:13,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:13,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519891007] [2022-03-20 05:43:13,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:13,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235156407] [2022-03-20 05:43:13,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235156407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:43:13,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:43:13,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 05:43:13,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309009326] [2022-03-20 05:43:13,397 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:13,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 05:43:13,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 05:43:13,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:43:13,399 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 05:43:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:13,563 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-03-20 05:43:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 05:43:13,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-03-20 05:43:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:13,567 INFO L225 Difference]: With dead ends: 142 [2022-03-20 05:43:13,567 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 05:43:13,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:43:13,568 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:13,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 05:43:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-03-20 05:43:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 05:43:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-03-20 05:43:13,573 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-03-20 05:43:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:13,573 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-03-20 05:43:13,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 05:43:13,574 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-03-20 05:43:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 05:43:13,574 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:13,574 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:13,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:13,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 05:43:13,780 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-03-20 05:43:13,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:13,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840131752] [2022-03-20 05:43:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:13,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:13,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:13,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640702957] [2022-03-20 05:43:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:13,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:13,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:13,789 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:43:13,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 05:43:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:13,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 05:43:13,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 05:43:14,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 05:43:14,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:14,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840131752] [2022-03-20 05:43:14,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:14,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640702957] [2022-03-20 05:43:14,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640702957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:14,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:14,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 05:43:14,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956884059] [2022-03-20 05:43:14,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:14,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 05:43:14,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:14,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 05:43:14,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:43:14,505 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 05:43:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:16,551 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2022-03-20 05:43:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 05:43:16,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-03-20 05:43:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:16,553 INFO L225 Difference]: With dead ends: 226 [2022-03-20 05:43:16,553 INFO L226 Difference]: Without dead ends: 220 [2022-03-20 05:43:16,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-20 05:43:16,554 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 58 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:16,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 402 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 05:43:16,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-20 05:43:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-03-20 05:43:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-20 05:43:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-03-20 05:43:16,562 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-03-20 05:43:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:16,562 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-03-20 05:43:16,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 05:43:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-03-20 05:43:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 05:43:16,563 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:16,563 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:16,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:16,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 05:43:16,792 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:16,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-03-20 05:43:16,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:16,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317342742] [2022-03-20 05:43:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:16,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:16,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:16,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958399455] [2022-03-20 05:43:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:16,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:16,811 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:43:16,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 05:43:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:16,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 05:43:16,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 05:43:17,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 85 proven. 37 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 05:43:22,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:22,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317342742] [2022-03-20 05:43:22,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:22,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958399455] [2022-03-20 05:43:22,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958399455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:22,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:22,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-03-20 05:43:22,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336691028] [2022-03-20 05:43:22,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:22,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 05:43:22,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:22,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 05:43:22,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=285, Unknown=1, NotChecked=0, Total=380 [2022-03-20 05:43:22,023 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 20 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-20 05:43:31,186 WARN L232 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:43:33,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:43:35,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:43:37,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:06,028 WARN L232 SmtUtils]: Spent 28.34s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:44:08,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:10,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:14,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:17,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:19,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:22,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:24,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:26,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:27,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:44:27,005 INFO L93 Difference]: Finished difference Result 229 states and 310 transitions. [2022-03-20 05:44:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 05:44:27,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 11 states have call successors, (31) Word has length 107 [2022-03-20 05:44:27,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:44:27,008 INFO L225 Difference]: With dead ends: 229 [2022-03-20 05:44:27,008 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 05:44:27,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=191, Invalid=562, Unknown=3, NotChecked=0, Total=756 [2022-03-20 05:44:27,008 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 85 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 137 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2022-03-20 05:44:27,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 335 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 313 Invalid, 11 Unknown, 0 Unchecked, 25.2s Time] [2022-03-20 05:44:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 05:44:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 218. [2022-03-20 05:44:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 118 states have internal predecessors, (138), 81 states have call successors, (81), 20 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-20 05:44:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 298 transitions. [2022-03-20 05:44:27,022 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 298 transitions. Word has length 107 [2022-03-20 05:44:27,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:44:27,023 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 298 transitions. [2022-03-20 05:44:27,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-20 05:44:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 298 transitions. [2022-03-20 05:44:27,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 05:44:27,024 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:44:27,024 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:44:27,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 05:44:27,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 05:44:27,235 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:44:27,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:44:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1614224774, now seen corresponding path program 2 times [2022-03-20 05:44:27,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:44:27,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443957438] [2022-03-20 05:44:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:44:27,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:44:27,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:44:27,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400970440] [2022-03-20 05:44:27,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:44:27,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:44:27,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:44:27,248 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:44:27,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 05:44:27,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:44:27,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:44:27,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 05:44:27,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:44:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-20 05:44:27,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:44:27,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:44:27,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443957438] [2022-03-20 05:44:27,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:44:27,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400970440] [2022-03-20 05:44:27,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400970440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:44:27,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:44:27,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:44:27,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396713872] [2022-03-20 05:44:27,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:44:27,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:44:27,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:44:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:44:27,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:44:27,443 INFO L87 Difference]: Start difference. First operand 218 states and 298 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-20 05:44:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:44:27,494 INFO L93 Difference]: Finished difference Result 199 states and 260 transitions. [2022-03-20 05:44:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 05:44:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2022-03-20 05:44:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:44:27,495 INFO L225 Difference]: With dead ends: 199 [2022-03-20 05:44:27,495 INFO L226 Difference]: Without dead ends: 199 [2022-03-20 05:44:27,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 05:44:27,496 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:44:27,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:44:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-20 05:44:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 123. [2022-03-20 05:44:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 05:44:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2022-03-20 05:44:27,501 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 116 [2022-03-20 05:44:27,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:44:27,502 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2022-03-20 05:44:27,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-20 05:44:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2022-03-20 05:44:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 05:44:27,504 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:44:27,504 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:44:27,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 05:44:27,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 05:44:27,724 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:44:27,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:44:27,724 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 3 times [2022-03-20 05:44:27,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:44:27,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827262148] [2022-03-20 05:44:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:44:27,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:44:27,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:44:27,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716387380] [2022-03-20 05:44:27,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 05:44:27,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:44:27,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:44:27,733 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:44:27,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 05:44:27,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 05:44:27,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:44:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 05:44:27,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:44:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-20 05:44:28,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:44:28,863 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:44:28,870 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:44:31,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:44:31,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827262148] [2022-03-20 05:44:31,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:44:31,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716387380] [2022-03-20 05:44:31,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716387380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:44:31,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:44:31,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 05:44:31,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771332857] [2022-03-20 05:44:31,148 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:44:31,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 05:44:31,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:44:31,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 05:44:31,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=347, Unknown=1, NotChecked=0, Total=420 [2022-03-20 05:44:31,149 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-20 05:44:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:44:31,778 INFO L93 Difference]: Finished difference Result 196 states and 258 transitions. [2022-03-20 05:44:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 05:44:31,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) Word has length 138 [2022-03-20 05:44:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:44:31,780 INFO L225 Difference]: With dead ends: 196 [2022-03-20 05:44:31,780 INFO L226 Difference]: Without dead ends: 193 [2022-03-20 05:44:31,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=108, Invalid=541, Unknown=1, NotChecked=0, Total=650 [2022-03-20 05:44:31,781 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 34 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 05:44:31,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 513 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 05:44:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-20 05:44:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2022-03-20 05:44:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 100 states have (on average 1.13) internal successors, (113), 100 states have internal predecessors, (113), 69 states have call successors, (69), 19 states have call predecessors, (69), 17 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-20 05:44:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 249 transitions. [2022-03-20 05:44:31,786 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 249 transitions. Word has length 138 [2022-03-20 05:44:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:44:31,787 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 249 transitions. [2022-03-20 05:44:31,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-20 05:44:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 249 transitions. [2022-03-20 05:44:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 05:44:31,788 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:44:31,788 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:44:31,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 05:44:32,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 05:44:32,006 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:44:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:44:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1947214227, now seen corresponding path program 4 times [2022-03-20 05:44:32,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:44:32,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901460285] [2022-03-20 05:44:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:44:32,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:44:32,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:44:32,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492873051] [2022-03-20 05:44:32,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 05:44:32,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:44:32,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:44:32,018 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:44:32,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 05:44:32,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 05:44:32,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:44:32,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 05:44:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:44:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 72 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-03-20 05:44:33,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:44:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 72 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-03-20 05:44:36,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:44:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901460285] [2022-03-20 05:44:36,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:44:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492873051] [2022-03-20 05:44:36,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492873051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:44:36,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:44:36,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2022-03-20 05:44:36,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157361862] [2022-03-20 05:44:36,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:44:36,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 05:44:36,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:44:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 05:44:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-03-20 05:44:36,274 INFO L87 Difference]: Start difference. First operand 187 states and 249 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) [2022-03-20 05:45:13,082 WARN L232 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 122 DAG size of output: 112 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:45:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:45:13,445 INFO L93 Difference]: Finished difference Result 295 states and 414 transitions. [2022-03-20 05:45:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 05:45:13,446 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) Word has length 157 [2022-03-20 05:45:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:45:13,447 INFO L225 Difference]: With dead ends: 295 [2022-03-20 05:45:13,447 INFO L226 Difference]: Without dead ends: 291 [2022-03-20 05:45:13,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 05:45:13,448 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 92 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-03-20 05:45:13,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 878 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2022-03-20 05:45:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-20 05:45:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 259. [2022-03-20 05:45:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 133 states have (on average 1.150375939849624) internal successors, (153), 133 states have internal predecessors, (153), 105 states have call successors, (105), 22 states have call predecessors, (105), 20 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-20 05:45:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2022-03-20 05:45:13,456 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 157 [2022-03-20 05:45:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:45:13,456 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2022-03-20 05:45:13,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) [2022-03-20 05:45:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2022-03-20 05:45:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 05:45:13,458 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:45:13,458 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:45:13,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 05:45:13,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:13,667 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:45:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:45:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash 915217378, now seen corresponding path program 5 times [2022-03-20 05:45:13,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:45:13,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623640915] [2022-03-20 05:45:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:45:13,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:45:13,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:45:13,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659329974] [2022-03-20 05:45:13,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 05:45:13,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:13,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:45:13,676 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:45:13,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 05:45:13,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-20 05:45:13,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:45:13,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 05:45:13,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:45:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-03-20 05:45:14,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:45:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-03-20 05:45:16,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:45:16,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623640915] [2022-03-20 05:45:16,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:45:16,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659329974] [2022-03-20 05:45:16,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659329974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:45:16,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:45:16,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 05:45:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289251084] [2022-03-20 05:45:16,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:45:16,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 05:45:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:45:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 05:45:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-03-20 05:45:16,457 INFO L87 Difference]: Start difference. First operand 259 states and 361 transitions. Second operand has 24 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-03-20 05:46:05,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:46:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:46:05,842 INFO L93 Difference]: Finished difference Result 424 states and 619 transitions. [2022-03-20 05:46:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 05:46:05,843 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) Word has length 160 [2022-03-20 05:46:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:46:05,845 INFO L225 Difference]: With dead ends: 424 [2022-03-20 05:46:05,845 INFO L226 Difference]: Without dead ends: 420 [2022-03-20 05:46:05,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=874, Invalid=3818, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 05:46:05,846 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 128 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2022-03-20 05:46:05,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1353 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 25.5s Time] [2022-03-20 05:46:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-03-20 05:46:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 343. [2022-03-20 05:46:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 170 states have (on average 1.1705882352941177) internal successors, (199), 170 states have internal predecessors, (199), 149 states have call successors, (149), 25 states have call predecessors, (149), 23 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-20 05:46:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2022-03-20 05:46:05,859 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 160 [2022-03-20 05:46:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:46:05,859 INFO L478 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2022-03-20 05:46:05,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-03-20 05:46:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2022-03-20 05:46:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 05:46:05,861 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:46:05,861 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:46:05,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 05:46:06,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 05:46:06,075 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:46:06,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:46:06,076 INFO L85 PathProgramCache]: Analyzing trace with hash -970371602, now seen corresponding path program 6 times [2022-03-20 05:46:06,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:46:06,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536908118] [2022-03-20 05:46:06,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:46:06,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:46:06,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:46:06,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513327836] [2022-03-20 05:46:06,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 05:46:06,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:46:06,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:46:06,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:46:06,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 05:46:06,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 05:46:06,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:46:06,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 05:46:06,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:46:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-03-20 05:46:07,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:46:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-03-20 05:46:09,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:46:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536908118] [2022-03-20 05:46:09,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:46:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513327836] [2022-03-20 05:46:09,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513327836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:46:09,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:46:09,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-03-20 05:46:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132980438] [2022-03-20 05:46:09,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:46:09,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 05:46:09,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:46:09,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 05:46:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-20 05:46:09,989 INFO L87 Difference]: Start difference. First operand 343 states and 495 transitions. Second operand has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-03-20 05:46:59,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:47:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:47:03,265 INFO L93 Difference]: Finished difference Result 515 states and 760 transitions. [2022-03-20 05:47:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 05:47:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) Word has length 160 [2022-03-20 05:47:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:47:03,267 INFO L225 Difference]: With dead ends: 515 [2022-03-20 05:47:03,267 INFO L226 Difference]: Without dead ends: 511 [2022-03-20 05:47:03,269 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=1108, Invalid=4592, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 05:47:03,269 INFO L913 BasicCegarLoop]: 142 mSDtfsCounter, 129 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2022-03-20 05:47:03,269 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 956 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 24.3s Time] [2022-03-20 05:47:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-20 05:47:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 443. [2022-03-20 05:47:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 218 states have (on average 1.1697247706422018) internal successors, (255), 218 states have internal predecessors, (255), 197 states have call successors, (197), 29 states have call predecessors, (197), 27 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2022-03-20 05:47:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 647 transitions. [2022-03-20 05:47:03,280 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 647 transitions. Word has length 160 [2022-03-20 05:47:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:47:03,281 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 647 transitions. [2022-03-20 05:47:03,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-03-20 05:47:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 647 transitions. [2022-03-20 05:47:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-03-20 05:47:03,282 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:47:03,283 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:47:03,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 05:47:03,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 05:47:03,499 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:47:03,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:47:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash -74761106, now seen corresponding path program 7 times [2022-03-20 05:47:03,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:47:03,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293726293] [2022-03-20 05:47:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:47:03,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:47:03,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:47:03,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741200478] [2022-03-20 05:47:03,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 05:47:03,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:47:03,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:47:03,512 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:47:03,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 05:47:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:47:03,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-20 05:47:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:47:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 300 proven. 369 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-03-20 05:47:05,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:47:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 385 proven. 38 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2022-03-20 05:47:11,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:47:11,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293726293] [2022-03-20 05:47:11,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:47:11,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741200478] [2022-03-20 05:47:11,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741200478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:47:11,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:47:11,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 29 [2022-03-20 05:47:11,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403912975] [2022-03-20 05:47:11,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:47:11,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 05:47:11,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:47:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 05:47:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-03-20 05:47:11,319 INFO L87 Difference]: Start difference. First operand 443 states and 647 transitions. Second operand has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 18 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (51), 16 states have call predecessors, (51), 16 states have call successors, (51) [2022-03-20 05:47:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:47:25,892 INFO L93 Difference]: Finished difference Result 535 states and 777 transitions. [2022-03-20 05:47:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 05:47:25,902 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 18 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (51), 16 states have call predecessors, (51), 16 states have call successors, (51) Word has length 204 [2022-03-20 05:47:25,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:47:25,903 INFO L225 Difference]: With dead ends: 535 [2022-03-20 05:47:25,903 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 05:47:25,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 374 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=483, Invalid=1773, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 05:47:25,904 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 77 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:47:25,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 855 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-03-20 05:47:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 05:47:25,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 05:47:25,904 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) [2022-03-20 05:47:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 05:47:25,905 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2022-03-20 05:47:25,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:47:25,905 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 05:47:25,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 18 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (51), 16 states have call predecessors, (51), 16 states have call successors, (51) [2022-03-20 05:47:25,905 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 05:47:25,905 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 05:47:25,907 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 05:47:25,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 05:47:26,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 05:47:26,110 INFO L719 BasicCegarLoop]: Path program histogram: [7, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:47:26,111 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 05:47:26,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:47:26 BasicIcfg [2022-03-20 05:47:26,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 05:47:26,113 INFO L158 Benchmark]: Toolchain (without parser) took 260868.11ms. Allocated memory was 189.8MB in the beginning and 288.4MB in the end (delta: 98.6MB). Free memory was 140.1MB in the beginning and 248.6MB in the end (delta: -108.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 05:47:26,113 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 189.8MB. Free memory was 157.0MB in the beginning and 156.9MB in the end (delta: 143.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 05:47:26,113 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.81ms. Allocated memory is still 189.8MB. Free memory was 139.8MB in the beginning and 165.0MB in the end (delta: -25.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 05:47:26,113 INFO L158 Benchmark]: Boogie Preprocessor took 35.12ms. Allocated memory is still 189.8MB. Free memory was 165.0MB in the beginning and 163.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 05:47:26,114 INFO L158 Benchmark]: RCFGBuilder took 242.65ms. Allocated memory is still 189.8MB. Free memory was 163.6MB in the beginning and 152.0MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 05:47:26,114 INFO L158 Benchmark]: IcfgTransformer took 38.34ms. Allocated memory is still 189.8MB. Free memory was 152.0MB in the beginning and 150.8MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 05:47:26,114 INFO L158 Benchmark]: TraceAbstraction took 260365.38ms. Allocated memory was 189.8MB in the beginning and 288.4MB in the end (delta: 98.6MB). Free memory was 150.4MB in the beginning and 248.6MB in the end (delta: -98.3MB). Peak memory consumption was 978.1kB. Max. memory is 8.0GB. [2022-03-20 05:47:26,115 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 189.8MB. Free memory was 157.0MB in the beginning and 156.9MB in the end (delta: 143.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 182.81ms. Allocated memory is still 189.8MB. Free memory was 139.8MB in the beginning and 165.0MB in the end (delta: -25.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.12ms. Allocated memory is still 189.8MB. Free memory was 165.0MB in the beginning and 163.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 242.65ms. Allocated memory is still 189.8MB. Free memory was 163.6MB in the beginning and 152.0MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 38.34ms. Allocated memory is still 189.8MB. Free memory was 152.0MB in the beginning and 150.8MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 260365.38ms. Allocated memory was 189.8MB in the beginning and 288.4MB in the end (delta: 98.6MB). Free memory was 150.4MB in the beginning and 248.6MB in the end (delta: -98.3MB). Peak memory consumption was 978.1kB. 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: 13]: 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 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 260.3s, OverallIterations: 18, TraceHistogramMax: 29, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 224.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 11 mSolverCounterUnknown, 936 SdHoareTripleChecker+Valid, 96.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 819 mSDsluCounter, 7471 SdHoareTripleChecker+Invalid, 95.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6407 mSDsCounter, 1891 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8366 IncrementalHoareTripleChecker+Invalid, 10268 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1891 mSolverCounterUnsat, 1064 mSDtfsCounter, 8366 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3199 GetRequests, 2749 SyntacticMatches, 24 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 140.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=443occurred in iteration=17, InterpolantAutomatonStates: 313, 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, 18 MinimizatonAttempts, 344 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 30.4s InterpolantComputationTime, 1739 NumberOfCodeBlocks, 1650 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 2956 ConstructedInterpolants, 0 QuantifiedInterpolants, 20196 SizeOfPredicates, 124 NumberOfNonLiveVariables, 4055 ConjunctsInSsa, 636 ConjunctsInUnsatCore, 30 InterpolantComputations, 4 PerfectInterpolantSequences, 11437/12529 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! [2022-03-20 05:47:26,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...